Categories
Analog Electronics Economics Politics Renewable Energy

Barack Obama Further Lays Out Renewable Energy Plan

I take a personal interest in Barack Obama‘s new plan to increase investment in renewable energy technologies, as I think and hope my long-term plan of working on renewable energies will come to fruition.


Skip to 9:38 to hear about his plans for renewable energy

I don’t seek to point out any political messages other than to focus on his determination to make renewables a viable part of the American economy, much like Thomas Friedman points out in Hot, Flat & Crowded. A green revolution or economy will help to return America as an arbiter of international issues by once again showing our leadership and innovation abilities (not to mention our economic strength). While I will point out that John McCain has also shown some initiatives for renewable energy (not to mention he does not believe that drilling for oil is the only solution), I feel that his focus on nuclear as the only true long term solution in his administration would not put enough money into the hands of people that will drive the “green revolution”. Given the possibility of recession in this country (or is it already here?), I believe that direct government investment in renewables will help to jump start the economy by driving job growth. And it won’t just come from the presidential administration either; people in the house and senate all need to push these new green energy agendas to really allow for new legislation. Great examples of this are Alice Kryzan, running for the 26th congressional district in New York and Dan Maffei who is running for theĀ  25th district, also in New York.

Probably the point that I would like to point out most in this video is his call upon the American people to reduce their consumption AND take personal responsibility in their lives (i.e. childhood education). Sure, we could use our innovative techniques to create energy at the cost of the environment ad nauseum. But why not instead work on power saving techniques? Why not inflate your car tires to increase gas mileage, instead of pushing for faster ramp ups of offshore drilling? Why not tell people to turn off their lights, recycle their garbage, stop watering their lawns and driving gas-guzzling cars? Because it’s tough telling people that stuff. It’s not going to work at first, but it will over time, and that’s why I thought this was a good video.

I always welcome comments on renewable energy, but given the touchiness of politics, please be extra gentle when commenting. What do you think of the renewable energy plan? Is it a pipe dream? Do you think there are pieces that both candidates are missing?

Categories
Economics Life Politics Renewable Energy

The Simple Ways to Help

I remember reading a book called “50 Simple Things Kids Can Do To Save The Earth” when I was about 10. It was a really great book and had some interesting conservation ideas. Then for my teenage years and beyond, conservation definitely took a backseat because no one was talking about it and teenagers think about other stuff, apparently. But now, writing about energy conservation and renewable energy more regularly, I’ve looked around and seen some really dumb things that I do in my everyday life that consume a lot of resources and energy.

The thing is, it’s not just about turning off lights when you leave a room or figuring out how much power your TV is wasting when it’s “off” (although these things are important). It’s also about reviewing products we use everyday and looking beyond what the final product is; what kind of resources were required to get that product to us and how much energy and resources did it take to make it?

Some of the simplest things I’ve noticed have been the disposable products I use. It was brought into sharp relief when I read Duncan Drennan’s post on traveling to the US and he pointed out how much stuff Americans throw away. Here’s some of the steps I’ve taken to reduce my daily waste; while most of them revolve around eating and work, it helps me sleep at night knowing I’m not piling up quite as much trash.

  1. Bring in a spoon to work — Stupid, right? But every time I went to grab a plastic fork and spoon at work to eat my lunch, I ended up throwing them away. I mean, that’s what they’re made for, right? But why not bring in a reusable piece of “equipment” (aka. spoon)? This is also a big problem in China, as throwaway chopsticks are becoming a larger and larger contributor to de-forestation.
  2. Get a reusable lunch bag and use Tupperware — Again with the food, but I’m amazed at how many times I would end up throwing stuff away…simply because it’s disposable. I switched out the plastic bag holding my lunch and the tiny bags holding my sandwiches and other items because there are other good options. I also think about how much plastic ends up in the ocean and how DISGUSTING that is, and it really makes me want to cut back on the plastic I dispose.
  3. Stopped drinking milk — This one was accidental, as we never have milk in our house anymore. However, it takes over 250 gallons of water to make just one quart of milk, as told by Dean Kamen. I think that there are better things that can be done with those kinds of resources and my body doesn’t particularly like milk anyway.
  4. Recycling — Trash day is amazing for me. When we get up early to walk the dog, I have a really great opportunity to scope out other peoples’ junk. Wow. I know that I don’t have kids who eat non-stop or anything, but when I see other peoples’ 4 overflowing trash cans and no recycling versus our half filled trash cans and some cans, it makes me wonder. I like to give people the benefit of the doubt that they don’t know about recycling in our area, but that’s a weak argument. I’m not saying we’re better than other people, just that public knowledge can help with conservation.
  5. Coffee — It makes the work world run, right? Well anytime I bought a cuppa at our company cafe, I’d buy the paper cup, use the stirrer, dump it all in my travel mug and then throw everything away. Stupid, stupid, stupid. I negotiated with the lunch ladies to use my cup in the first place, only to find out this was OK all along. Sometimes you just gotta ask.
  6. Turn off the computer — Even in power save mode, leaving a computer on overnight can be costly. Now think about a high rise in NYC or somewhere else and all the needless energy burning there. This comes down to electricity being cheap and therefore employers not pushing their employees to conserve. If we see prices spike, expect managers to ask you to shutdown the ol’ PC at night. Even if we can’t access our files all night long (wee!), Mother Nature will appreciate whatever extra coal plant output (electricity and pollution) we save due to turning the computer off.
  7. Eating less meat — Now that I think of it, cows can be pretty detrimental as consumers — from the water they consume, the amount of feed they require and the gas they emit. Eating less meat is not only a good thing economically and ecologically, it may become a necessity as the possibility of recession looms and more and more of China and India enter the middle class.

Of course, these are stupidly simple things people can do to help out. And it’s not always about saving the world. Using one more or less napkin at lunch? Nah, it won’t hurt the planet that much. But take 6 billion people using one extra napkin a day for even a year and you start seeing forests disappear for no good reason. I’m not one to harp on conservation because I understand that some consumption is going to happen, whether we like it or not. This blog is also about analog electronics and renewable energy, not conservation, so I don’t want to stray too far from that by giving regular tips on how to save the world. However, it is a pressing issue, both in energy consumption the world over and good conscience about making waste unnecessarily. Try your best to reduce your overall consumption today and leave any additional ideas you have in the comments.

Categories
Economics Renewable Energy

The Renewable Energy Singularity

It’s gonna happen. Some day.

Some day, we (as the human race) will reach a point–or a singularity–where it will be more economically viable to create renewable energy than to harvest oil or coal out of the ground; there won’t be any going back. We started toeing that line a few months ago. Oil just about crossed the $150 mark before dropping way back, thanks to the possibility of recession. Now that we’re back into cheap oil land, we will probably suffer a setback on developing newer more efficient energy solutions (not even necessarily renewable ones). But once we cross that threshold where renewable energy is cheaper than hydrocarbon based energy, the world can only change for the better.

Let’s look at things that will accelerate the pace at which we (are forced to) develop new energy technologies:

  1. We run out of oil — Whoops! Can that really happen? You’re darn skippy it can happen. And will happen, if growth continues as it had for the past few years. China and India are waking up as new middle class citizens and they are thirsty for oil. There were only so many dinosaurs and other critters that are now our oil supplies.
  2. The oil that is left is REALLY hard to get to — Recently Cuba found out they have one of the largest oil reserves in the world just off their coast. Too bad it’s a mile or more under the ocean. That’s a lot of water to get through just to get at the oil. It’s even tougher if you have primitive oil companies trying to get at that oil. If the price of oil is high enough there’s likely to be someone crazy enough to go get it, but that might raise the price even more.
  3. The oil and coal the US imports is no longer available — The main reason would be “conflict” a.k.a. War. We make Iran or other friends of OPEC angry enough and they might decide to stop sending us 55 gallon drums of crude (that’s just how they measure it…not ship it, right?).
  4. We can’t afford it anymore — Since we’ve been sending China our money for a long time, they are sitting on some significantly larger piles of cash (in US dollars, thank you very much). If it comes down to an eBay style bidding war, the bigger pile is going to win. Even bidding at the last moment won’t help!

OK, so we’ve decided what might get us into this mess. But what else can get us out of this mess? It’s pretty clear that the next US presidential administration will have some serious sway over how renewable energies are governed and encouraged. If they read, or better yet employ the author of “Hot, Flat and Crowded” — Thomas Friedman, then they will have a level headed economist with some great ideas on their side. More important than one man or even one administration is a multi-point plan of attack for reducing the cost of renewable energy.

Remember, the thing we’re concentrating on is that point where it’s more cost efficient to harvest renewable sources than to dig up carbon based sources. In theory, this makes a lot of sense. Sunshine is definitely free, even if it is harder to come by in the great north. Wind is prevalent just about everywhere, just look at Kansas. But until the infrastructure and the methods are in place, all of these elements won’t contribute to our renewable energy solution, they will just sit useless until everybody jumps on board. Let’s look at a list of hurdles we will have to pass in order to make renewable energy, and more importantly energy independence, a reality:

  1. Efficiently storing energy– From what I’ve seen so far, this will probably be done by splitting H20 into hydrogen and oxygen. While I don’t like the idea of liquid or gaseous hydrogen sitting in my car, basement, etc, I would hope material technologies catch up so catastrophic events aren’t as often as we might think. Unless some game changing technology such as batteries or super capacitors comes and proves it can store energy better than electrolysis, then splitting molecules will be the way to go.
  2. A newer and better power grid — This is one whopper of a problem. You know how you hate going to Best Buy to purchase a 10 ft length of cable because the one coming out of your wall won’t reach your TV? You know how they totally overcharge you because those are their high margin products? Well even if there was NO margin, imagine how expensive it would be to run one wire all the way across the United States. Now imagine criss-crossing those wires across every town and city across the United States. Oh and those really huge amounts of cable? Well, let’s make them out of copper, which is currently at some all time price highs right now. A better routed and controlled power grid is a good first step to increasing the efficiency of power transport. But until we as a country begin to revamp the aging infrastructure of this country, renewable energy will not be a reality for locally generated power sold to the masses or at a central power station system where excess power can be put on the grid at any time it is available.
  3. Bringing in the big boys — Like it or not, the big energy companies need to be a part of it. Until BP or Chevron can continue to make the profits they are making with oil, then there will be problems.  I’m not saying that the king cannot be dethroned (ahem, GM), but I think that if the big boys are in on the action, they will be less likely to lobby the government for oil and maybe even turn their interest towards lobbying for renewables. Who wouldn’t want to get free energy (solar)? All you do is plop down the infrastructure and collect those deliciously free solar rays.  On another note about the big boys, I am happy to say that they have started recognizing some of the potential in renewable energy, although it is unlikely that they will be turning in their oil rigs for solar panels anytime in the next few years. Oil rigs are expensive!
  4. Progressive tax credit reforms — Again, this is likely to hinge on the upcoming election and ensuing presidency but in the event that point 3 does not go through and oil companies continue to lobby for hydrocarbon use, tax credits will be needed so individuals are encouraged to buy their own wind, solar and geothermal systems.  Sure, the lowered costs help, but until there is governmental push, it’ll be slower adoption on the part of big business.
  5. Finding replacements for current solutions — I once visited the GE Aviation facility in Cincinnati and I can tell you, that facility is HUGE. It must be miles of offices and test bays completely dedicated to producing engines that run on jet fuel. Until THEY decide to switch over and try new methods of propulsion, having an abundance of hydrogen might not do them (or us) any good. The end products (in this case engines) require jet fuel and until they require something other than jet fuel (and therefore drive the demand down and the impetus to go find and sell more of it down), then the cost of renewables will remain high by association (because there will be less demand for it).

As much as we wish it was, making cheaper solar panels isn’t the only solution to reducing costs of renewable energy. There are many different aspects that feed into making renewable energy a final solution for the human race. If you can think of more milestones we’ll have to reach before this vision becomes a reality, please post them in the comments.

Categories
Engineering Life Work

Engineering soft skills and stepping outside your circle of competence

My great great grandfather was a preacher. My grandfather was a great salesman. My father is a great salesman. I am an engineer. One of these things is not the same here. How did I enter a profession often associated with introverts and socially challenged people? Am I doomed to fulfill this stereotype? What kinds of skills must I develop to be a better engineer all around?

I write about these things for two reasons. One, because the skills I’m about to list are necessary in every aspect of life, not just work. And two, because most engineers do not stay engineers for their entire career. Either because of desire for higher pay grade, natural promotion or just wanting to be in charge, most engineers end up in management eventually. I will leave opinions about whether this is the correct path to the comments.

  1. Public speaking — One of the most feared activities the world over, this is a good one to force yourself to practice.Ā  Granted, not many new grads will have much to present about; but once you are tapped for that first presentation, it is likely it is an important reason. It’s probably better to practice your public speaking in front of your design group or an organization outside of work before you’re chosen to speak in front of the company. The best tip I can give is to slow down. You’ll become more aware of what you’re saying and you’ll be less likely to say “um” when your mouth pauses from its usual mile-a-minute pace.
  2. Presentations — I believe Nate (a good friend and frequent commenter) put it best in my post about getting a job out of college, when he said that the engineering education at our school didn’t focus nearly enough time on giving presentations and communicating our ideas to our superiors. When you look at the percentage of time we present compared to how much time we spend designing a solution, it seems much more important than ever was stressed in school. For tips on presentations and powerpoint, I usually look to Seth Godin, marketing guru and writer extraordinaire.
  3. Conventioneering — Not every engineer goes to conferences on a regular basis, but when you do, you have to know how to work it. Remember, it’s not just a food free for all; nor is it time to go around seeing how many thousand pens you can gather. These are opportunities to check out your competition, find new components for designs, see some cool stuff and maybe even make a few friends (or contacts, if you will).
  4. Small talk — You know what you do a lot of at conventions? You stand around a lot. You know what else you do? You make small talk with strangers. But the skill here is learning how to open people up to talking about more than the OSU football team or the weather. Instead you want to find some meaningful information about them and then relate back to them with stories of your own that fit. Getting people to relate to you will help you build your business contacts, drum up leads for your marketing people and again, help you make friends. You never know who you meet that might be working on the next Google or Apple. You just never know.
  5. Networking — Things don’t last forever. In fact, it’s a skill to know when to quit rather than wait for a job to dead end. Unfortunately, people always extol the virtues of networking but never tell you how to do it. Some say blogging is a good idea for networking, but I haven’t hit the jackpot on that one yet. I’d say the best way I’ve found so far is to bite the bullet and call up some people you don’t know (who happen to know a lot) and ask them for some time to talk about what they do. Sure, this works better when you’re not looking for a job, but it works OK when you’re desperate too. Remember, there are a LOT of people out there and the ones getting calls are mostly the ones everyone knows about (Steve Jobs, Bill Gates, etc). If you happen to catch a name of a local engineer who does something you do, call him or her up and ask to hear about their job for a while. If you don’t think you’ll be overhearing any names anytime soon, go to LinkedIn and snipe some names off of there. The main thing is to be courteous, be honest with them (if they ask if you are doing this to find a job, tell them yes or no) and most of all, be interested. Playing to someone’s ego may sound bad, but it works because people want to feel important and wanted. Don’t forget the thank you notes either. (For more info on networking, I always like “What color is your parachute” by Richard Nelson Bolles. It is updated yearly and has some great information).

Soft skills aren’t limited to the ones above, but they can get you pretty far in life past the lab bench. Remember, these skills aren’t absolutely necessary–they just help engineers round out their skillsets. If you are an engineer who wants to start a company one day, you’re going to have to sell your idea, at least once. So you might want to think about working on developing the skills listed above; at the very least, recognize what they are and partner up with someone who displays these attributes.

Is there a soft skill missing? Am I way off on any of these? Let me know in the comments!

Categories
Blogging Economics Music Politics Renewable Energy

“Hot, Flat and Crowded” By Thomas Friedman — A short review

I love public libraries because it’s like having Amazon.com minus the pesky notion of paying for a book. However, the downside is you don’t get to keep what you’re reading–especially if it is a popular book that other people want before you can renew it. As such, I’m going to review what I’ve read of this book so far, because it’s just that good.

For background, Thomas Friedman also wrote “The World is Flat”, a book detailing how the economy and the world has changed since the September 11th attacks, both good and bad. In that book (written in 2005) he details the benefits of outsourcing and globalization and actually downplays the notion of globalization as an enemy, instead framing it as an opportunity that requires a competitive nature in workers and corporations. While that book was written before there was the possibility of recession, the book explains the rapid growth that is occurring overseas which will likely collapse along with the credit markets. I highly suggest reading that book if you have not, it is a great introduction into Friedman’s writings and is a good preface for the book reviewed here.

Onto the main event. Let’s decode the title of this book:

  • Hot — Not too hard to figure this one out. Global warming is not just a potential threat anymore, it’s real, it’s dangerous and it’s here to stay (or is it?)
  • Flat — See the previous paragraph. The world is quickly trying to elevate more people into the middle class than ever before. This is putting a serious strain on all resources of the planet, including the atmosphere.
  • Crowded — Barring a major war, outbreak or famine, the world population keeps on growing. Add to the mix better drugs, a higher focus on health and longer life expectancies, the people that are here will probably stick around too. Overpopulation is yet another drain and strain on the planet’s resources, multiplicatively so if those people are in the middle class.

Of these, I would put forth that only the “hot” portion has any solution, and at that, reduced consumption and switching to renewable energy will likely only go as far as retaining the current temperature of the earth. For the “flat” and “crowded” parts, the best case scenario is that we find ways to accommodate more and more people entering the middle class and the world in general by changing our perceptions of allowable consumption in the middle class (and any class for that matter). Most notably, Americans who have become accustomed to a particularly wasteful way of life (as chronicled by Duncan)may have to re-assess how they consume products; while it would be nice to think we will do this with conservation in mind, more realistically we will be forced to do this because of the laws of supply and demand are going to make previously cheap products much more expensive.

How do we do it, you ask? With a “green revolution”. This means an economy that is based around locally produced energy that is both renewable and environmentally friendly. Even though it sounds a bit new-agey to conjecture that renewable energy can save the world, it really starts to make sense when you look at current world issues. Here are some problems that a green economy can fix:

  1. Energy supply and demand — The best ways to bring down energy costs is to either flood the market with it (energy) or tell the energy producers you don’t need it. Since the world as a whole will not likely give up our digital and analog electronic gadgets anytime soon and our energy usage will likely increase, it would behoove us to begin making cheap and renewable energy. Since oil doesn’t seem to be an option as cheap energy anymore, we should probably start looking at new exciting options, like solar cells made out of black silicon.
  2. Petropolitics — If we don’t end up going out and figuring out how to make renewable energy, we’ll continue shipping boatloads of money to countries that hate us. Like I had written about these oil barons before, why not hit them where it hurts? In the wallet.
  3. Climate Change — Al Gore knows it and told a lot of the world. There is undeniable climate change happening every day we continue to dump greenhouse gases into the atmosphere. Reduce coal and oil usage and the amount we dump into the air will go down.
  4. Energy Poverty — Without energy, it’s hard to do a lot of things. Most of us would go check into a hotel if the power went out for more than a week. However, one third of the world lives in energy poverty, meaning they cannot even come close to pulling themselves out of monetary poverty; health standards are proven to drop dramatically when people live this way.
  5. Biodiversity Loss — Human consumption of natural resources is threatening damn near every species on the planet, up to and including humans. If we don’t want to have only cockroaches and squirrels running around a polluted planet with us, we need to set up more sanctuaries and reduce

I unfortunately didn’t get to read about all of Friedman’s ideas, but plan to read more as I get my own copy of this book. (More of the basis of his ideas can be read from his entries in the NY Times and Foreign Policy magazine)

I will leave you with one of my favorite statistics and quotes that Friedman puts in the (beginning of the) book; MoisĆ©s NaĆ­m also writes in Foreign Policy about the Chinese and Indian middle class that is emerging and how “the total population of the planet will increase by about 1 billion people in the next 12 years, [but] the ranks of the middle class will swell by as many as 1.8 billion”. Just think about that for a second. 1.8 BILLION more people leaving the lights on, eating cheeseburgers, driving SUVs and doing everything else they’ve been sold as “the American Dream” (or at least way of life). They can’t be stopped and they are constantly told through advertising that they deserve whatever they want. Something has to change, and fast (besides the economy). I want to find solutions for new renewable energy and I hope you do too; but a quick thing that will help everyone is if you switch those lights off at home when you’re not using them, so be sure to do that too.

Scared by all of this? That wasn’t the point of this post, but it scares the heck out of me too. Go out and read this book and leave some comments about what you think about the future of the world.

Categories
Renewable Energy

Is black silicon the way to make cheaper solar power?

I came across an article today talking about how black silicon will revolutionize solar power. The idea developed at Harvard (and now at a company called SiOnyx) is basically to blast the surface of a silicon wafer with a high intensity laser for a very short interval. This short time “melts” the silicon and when it comes back together it has a structure allows the structure of the silicon to absorb more light. They also utilize a new type of doping, (doping is insertion of low quantities of specific elements, such as phosphorus, into silicon in order to change the properties of the silicon. Depending on the type of dopant the silicon may want to release an electron or absorb one); the laser process likely allows better penetration of the dopants into the silicon, which usually are accelerated into the silicon with HUGE magnets. There aren’t specifics about the entire process, but as you can see in the picture below, the silicon seems to stretch upwards creating cones of silicon. I would guess that the process is similar to carbon nano-tubes where they also use a laser to blast the carbon. It also makes sense that the process would work for silicon given the similar structure between carbon and silicon.

Courtesy of SiOnyx

Again, I don’t know the specifics of how the final product works better, but my guess would be that the cones are much better and capturing light, due to the higher surface area. When the light hits these more sensitive nodules, the energy “knocks” an electron loose (just as in regular PV cells), which then contributes to the overall current coming from the cell. Also of note is how the dopants shift the sensitivity of the silicon to a lower wavelength. In this case, it is shifting it down into the red and infrared regions of the spectrum, which allows for more energy to be absorbed by silicon, as opposed to reflected. This also is the namesake characteristic of this technology, because in theory “black” silicon would absorb all light (as opposed to a theoretically worthless “white” silicon that would reflect all light). The higher amount of cells hit by light (due to more surface area) and the greater sensitivity to low wavelength light such as infrared (which our bodies interpret as “heat”) gives this new silicon a much higher overall absorption and translation into usable electrical energy.

I like this idea because it lets existing solar facilities be transformed easily into solar cell facilities. This new capacity could then be absorbed by local micro-factories, putting the solar arrays together and hopefully driving the cost to the consumer down. As more and more fabrication facilities are shut down due to a possible recession, they could quickly be modified to start outputting less complicated solar cells in higher volumes. The SiOnyx equipment would provide the final processing necessary to have the higher efficiency panels.

I only know what I have read online, but I like what I have seen thus far (plus I tend to trust researchers from Harvard more than just some schlub off the street). It seems feasible in the short term and has much broader appeal and use than ideas like “dancing to save the world“. Check out the above article and if you have any thoughts, please leave them in the comments.

Categories
Analog Electronics Digital Electronics Engineering Learning Life Work

How to get a job as a new electrical engineer grad

I was going to call this post “A portrait of an electrical engineer as a young man (or woman)” but decided against it. I’ve got nothing on James Joyce, neither in loquaciousness nor confusing writing.

Anyway, I have been pondering what kind of employee I would hire out of school for an electrical engineering position. There are some basic skill sets that will allow just about any young engineer to succeed if they have these skills (the best situation) or at least appear they will succeed if written on their resume (not the best situation). Either way, let’s look over what a new grad should have on their utility belt before going out into the scary real world.

  1. Conceptual models of passive components — This has been one of the most helpful things I have learned since I have left school…because this kind of thinking is not taught in classrooms (at least it isn’t in the curriculum). The idea is to conceptualize what a component will do, as opposed to what the math is behind a certain component or why the physics of material in a component give it certain properties. Why does this matter? When you’re looking at a 20 page schematic of something you’ve never seen before, you don’t care what kind of dielectric is in a capacitor and how the electric field affects the impedance. Nope, you care about two things: What is the value and how does it affect the system. The first question is easy because it should be written right next to the symbolic notation. The second is different for each type of passive component you might encounter. Let’s look at the common ones
    • Resistors — TheĀ  best way I’ve found to think of resistors is like a pipe. The electrons are like water. The resistance is the opposite of how wide the pipe is (if the resistance is higher, the pipe is smaller, letting fewer electrons through in the form of current). Also, the pressure (voltage) it takes to get water (electrons, current) through a pipe (resistor) will depend on the thickness of the pipe (resistance). Well whaddaya know? V=IR!
    • Capacitors — At DC, a capacitor is essentially an open circuit (think a broken wire). If you apply charge long enough (depending on the capacitance), it can consume some of that charge; after it is charged it will once again act like an open circuit. When considering AC (varying) signals, the best way to think about a capacitor is like a variable resistor. The thing controlling how much the capacitor will resist the circuit is the frequency of the signal trying to get through the capacitor. As the frequency of the signal goes up, the resistance (here it is called “impedance”) will go down. So in the extreme case, if the frequency is super high, the capacitor will appear as though it is not there to the signal (and it will “pass right through”). Taking the opposite approach helps explain the DC case. If the signal is varying so slowly that it appears to be constant (DC), then the impedance of the capacitor will be very high (so high it appears to be a broken wire to the signal).
    • Inductors — Inductors have an opposite effect as capacitors and provide some very interesting effects when you combine them in a circuit with capacitors. In their most basic form, inductors are wires that can be formed into myriad shape but are most often seen as spirals. Inductors are “happy” when low frequency signals go through them; this means that the impedance is low at low frequencies (DC) and is high at high frequencies (AC). This makes sense to me because if the signal is going slow enough, it’s really just passing through a wire, albeit a twisty one. An interesting thing about electrons going through a wire is that when they do, they also product tiny magnetic fields around the wire (as explained by Maxwell’s Equations). When a high frequency signal tries to go through the inductor, the magnetic fields are changing very rapidly, something they intrinsically do not want. Instead it “slows” the electrons, or really increases the impedance. This “stops” higher frequency signals from passing through depending on the inductance of the inductor and the frequency of the signal applied. Looking at the how they react to different frequencies, we can see how inductors and capacitors have opposite effects at the extremes.
    • Diodes — I think of diodes as a one way mirror…except you can’t see through the one way until you get enough energy. The one way nature is useful in blocking unwanted signals, routing signals away from sensitive nodes and even limiting what part of a varying signal will “get through” the diode to the other side.
    • Transistors — I always like thinking of transistors as a variable resistor that is controlled by the gate voltage. The variable resistor doesn’t kick in until the gate voltage hits a certain threshold and sometimes the variable resistor also allows some energy to leak to one of the other terminals.
  2. C coding — Sorry to all you analog purists out there, but at some point as an engineer, you need to know how to code. Furthermore, if you’re going to learn how to code, my personal preference for languages to start with is C. Not too many other languages have been around for as long nor are they as closely tied to hardware (C is good for writing low level drivers that interpret what circuits are saying so they can talk to computers). I’m not saying higher level languages don’t have their place, but I think that C is a much better place to start because many other languages (C++, JAVA, Verilog, etc) have similar structure and can quickly be learned if you know C. Even though the learning curve is higher for C, I think it is worth it in the end and would love to see some college programs migrate back towards these kinds of languages, especially as embedded systems seem to be everywhere these days.
  3. How an op amp works — I set the op amp apart from the passives because it is an active component (duh) and because I think that it’s so much more versatile that it’s important to set it apart conceptually. I’ve always had the most luck anthropomorphizing op amps and figuring out what state they “want” to be in. Combining how you conceptually think about op amps and passives together can help to conceptualize more difficult components, such as active filters and analog to digital converters.
  4. The ability to translate an example — A skill that nearly every engineering class is teaching, with good reason. Ask yourself: are homework problems ever THAT much different from the examples in the book? No. Because they want you to recognize a technique or a idiosyncrasy in a problem, look at the accepted solution and then apply it to your current situation. Amazingly, this is one of the most useful skills learned in the classroom. Everyday engineering involves using example solutions from vendors, research done in white papers/publications and using even your old textbooks to find the most effective, and more importantly, the quickest solution to a problem.
  5. High level system design — This is similar to the first point, but the important skill here is viewing the entire picture. If you are concentrating on the gain of a single amplification stage, you may not notice that it is being used to scale a signal before it goes into an analog-to-digital converter. If you see a component or a node is grounded periodically, but ignore it, you may find out that it changes the entire nature of a circuit. The ability to separate the minutiae from the overarching purpose of a circuit is necessary to quickly diagnose circuits for repair or replication in design.
  6. Basic laws — It is amazing to me how much depth is needed in electrical engineering as opposed to breadth. You don’t need to know all of the equations in the back of your textbook. You need to know 5-10; but you need to know them so well that you could recite them and derive other things from them in your sleep. A good example would be Kirchoff’s laws. Sure, they are two (relatively) simple laws about the currents in a node and the voltage around a loop, but done millions of times and you have a fun little program called SPICE.
  7. Budgeting — There are many important budgets to consider when designing a new project. In a simple op amp circuit, there are many sources of error and inefficiencies. Determining and optimizing an error budget will ensure the most accurate output possible. Finding and determining areas that burn power unnecessarily must be discovered and then power saving techniques must be implemented. The cost is another consideration that is usually left to non-engineering, but is an important consideration in many different projects. Finding cost effective solutions to a problem (including the cost of an engineer’s time) is a skill that will make you friends in management and will help you find practical solutions to many problems.
  8. Math — Ah yes, an oldy but goody. Similar to the passive components, having a conceptual notion of what math is required and how it can be applied to real life situation is more important than the details. Often knowing that an integral function is needed is as important as knowing how to do it. And similar to the basic laws, you don’t need to know the most exotic types of math out there. I have encountered very few situations where I need to take the third derivative of a complicated natural log function; however, I have needed to convert units every single day I have been an engineer. I have needed simple arithmetic, but I’ve needed to do it quickly and correctly. Sure, you get to use a calculator in the real world, but you better learn how to use that quickly too, because your customers don’t want to wait for you to get out your calculator, let alone learn how it works.

Each of these skills could be useful in some capacity for a new electrical engineer grad. There are many different flavors of engineering and the skills listed above are really modeled off what would be good for an analog system engineer (who develop commercial or industrial products). However, a future chip designer and even a digital hardware engineer all could benefit from having the skills listed, as it is sometimes more important to be open to new opportunities (especially given the possibility of recession and potential shifting of job markets).

Did I miss anything? Do you think there are other skills that are necessary for young electrical engineers? What about general skills that could apply to all young engineers?

[xyz_lbx_default_code]

Categories
Analog Electronics Economics Supply Chain

DC powered home

Either my readership has extended to people at multinational corporations or the idea is intrinsically viable enough to actually work! Either way, I’m happy.

Junko Yoshida of EE Times reports that Sharp Corp and TDK corp have both displayed home mock-ups that include DC modules running of of solar cells and do not require any AC/DC or DC/AC conversion (thereby saving power wasted on the conversion process). This is reminiscent of when I asked if DC can power an entire home. They cite instances of using DC power to directly use in LED home lighting, flatscreens and various other commercial products.

Looks like the idea is catching on, I can’t wait until it becomes possible for everyone!

Categories
Engineering Health Life Work

Standing up while working

I had an opportunity to go to a conference last week where I stood in front of a booth for 4+ hours. By the end I was chugging coffee to stay awake and my lower back hurt so bad that I had to lean on the table in order to appear that I was still functional as a presenter and engaged with people that came up to talk to us. I really couldn’t believe how much things have changed. When I was working night shift in the fab, there would be nights where I would stand for 8+ hours of a 12 hour shift, oftentimes standing in front of a machine, modifying something on a touchscreen. I know this could have been even worse and that many people deal with even longer and more strenuous hours, but the difference between my old work environment and my current one is pretty glaring to me.

So once I was back in my comfortable office chair in my cube, kicking back, staring at my computer monitor and once again chugging coffee to stay awake, I realized I have to change something. Even though I enjoy many parts of my job, the computer is a necessity and I have to deal with working on one, sometimes for hours at a time. Like any brash young man, I decided to act first, ask questions later: I hoisted my monitor up on a shelf above my desk, placed my keyboard on top of an unused garbage can turned over and put my computer mouse up on a couple boxes, all roughly at my eye or arm level. I now had a makeshift standing workstation and looked like a certifiable geek. Now that the action was complete, I ask: why would someone want to stand while working? A little Googling resulted in a fine piece of supporting information on why someone might want to stand while working. Allow me to summarize and expand upon these ideas:

  1. It’s healthy — Intuitively, standing makes more sense than sitting at a desk. Evolution has shaped humans so they can hunt, gather, assemble, reproduce, eat, sleep, etc. There wasn’t too much time spent developing as creatures that push buttons while hunched over in front of little screens (obviously this will be the future of the human race). Standing makes sense from many health perspectives, so let’s dive even deeper into this concept.
    1. Bloodflow — Similar to the point above, the human body wants to exist in a straight line, where the heart does not have to pump blood around 90 degree angles (your knees, etc). There are also less places for blood to pool when you are standing (your feet, perhaps) and less chances of circulation being cut off to extremeties (fingers, toes). The tradeoff between potential pooling of blood in the feet (which can be walked off) versus better overall circulation is definitely worth it.
    2. Posture — Slouching is SO easy when you are sitting in a comfy office chair, even one of the posture enhancing chairs that go for $800+. I happen to be an expert at slouching in my seat so I don’t need any help from a chair.
    3. Alertness — If you invent a time machine and go back a few hundred thousand years and I bet you won’t see a caveman rolling around in a desk chair, hunting his prey. Sitting makes me sleepy and I hope to eventually wean myself off of coffee as a result of standing up while working.
    4. Concentration — This has been the most surprising side effect for me thus far. I can basically see everyone who walks by, as opposed to hearing them before. One might think this would distract me from my work, but either I am becoming indifferent to seeing people pass me or the increased bloodflow and endorphins reaching my brain are telling me that it’s ok to keep reading a paper on an op-amp or whatever I happen to be perusing.
    5. You won’t get sick — Seth Roberts is a professor emeritus from UC Berkeley who has been doing self-experimentation for 12 years for self gain and in conjunction with his research. Along the way he some how correlated standing while working to a marked reduction in the number of colds per year. This alone is enough reason for me to try it.
  2. Visibility — I am 6 feet tall, exactly. Standing does two things for me. First, it allows me to see out the windows that would usually be blocked by my cube wall. This may come back to bite me on a dreary winter day in the Great North, but I’m willing to risk it. Second, the unintended consequence of being noticed by others, including management. This is not a concern of mine either way, but I think it’s interesting nonetheless.
  3. Accountability — Again, the height of my monitor is enough that it just shows over the top of the cube walls. I’m not saying I’ve ever been a devious employee, but allowing others see what I am doing on your computer definitely has me checking CNN and Reddit less frequently (wasn’t much to begin with). If I do decide to take a break, I look at what I want to see (headlines) and get back to my work. With a tightening of belts throughout the industry and the looming possibility of recession, now is a great time to work extra hard and show your company just how valuable you are.

To be honest, I haven’t been standing while working for very long nor do I know if it will last. If even half the benefits listed above are true, then it will be worth looking silly at work until my co-workers get used to me standing while working. Have you ever considered doing something like this? If so, please let me know in the comments.

Categories
Analog Electronics Blogging Health Learning Life Music Politics

Why start a namesake site?

Tonight, I’m using every bit of my being not to post something political (watching the VP debate). The tension in this country is so thick you can cut it up and serve it. Anyway, instead I will post a question (to myself).

Why did I start ChrisGammell.com?

I’ve written before about why I started a blog, but never why I decided to make it a namesake site (using my real name, all over the place). The main reason is branding. Pure, simple and maybe a little bit selfish. It’s actually a lot of work to get people to know your name. It’d be much easier to start a blog titled “AnalogElectricalEngineering.com” or something like that. That would be great for the average Analog Electrical Engineer, but not so much for Chris Gammell. In that case, I would have to work extra hard to let people know who I am and what I do. So why else? I like trying to be an individual (even if it complete individuality may not be possible). I love the idea that people are reading my ideas. I like the attention, sure, but moreso, I like contributing to society, even a little bit. Perhaps it’s a characteristic of Generation Y, but I enjoy it and I’ll spend some late nights to help out if I can. Yet another reason is that I enjoy challenging myself to learn knew things. True, I feel a little guilty blogging about things I’m not a master of, but if I spend some time researching, I can usually point readers in the right direction, even if I’m not completely sure. The best point is where I define a problem for myself online and then figure it out and get to post it later.

It’s a risk, for sure. First off, if I publish some bogus articles, people will know it. Moderators, readers, editors, professionals, everyone is really a critic on the internet. But I’m ok with that because when someone corrects me (hopefully in a civil manner) it’s an opportunity to learn. Plus my ego isn’t so big that I think I know everything (or anything). Beyond the simple idea of being wrong, I’m also giving direct access to a lot of information about myself and my life, even if it is my professional life. I justify the lack of anonymity by thinking about having people coming back and reading my ideas because they recognize my name. If I can inspire some confidence in my ideas, then I’m doing alright. Finally, I take great care to not reflect badly upon those that know me, nor those that are associated with me. In my thus-far short career as an analog engineer, I’ve found that referring other people is a power that should be respected. Not only should you be careful who you refer to others but also how you interact with others so they will someday refer you.

Short and simple, I started a namesake site because of my ego. I keep it going because I love the direction it’s taken me in. I love that blogging is helping me define myself outside of my job, even if it is similar to my job (which I also love).

Why do you blog (or not blog)? Respond in the comments, please!