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What Is A Power Budget?

Boy is it hot in here or is it just me? Why’s that gizmo over there giving off so much heat?

Power budgets are a necessity these days. Due to increasing regulation, we’re seeing devices that must comply with efficiency limits in their power conversion (using a switching power supply or otherwise).

So what is a power budget? Much like a budget you might have for your personal finances, a power budget shows where all the possible power will be used by a device to by breaking it down into components and categories. In some situations, you might be told up front that you will have 3W available to run your design. However, sometimes as designers we start by calculating the total power a system needs and then taking actions such as replacing parts or redesigning circuits to cut back power to an acceptable level. So why might someone want to do a power budget from day one?

Homeschooling

I have lots of thoughts about education, especially higher education. The theme that keeps popping up in my head though is that school isn’t too far removed from teaching yourself. Honestly, let’s look at the learning process:

  1. Encounter a “problem” that needs to be solved.
  2. Do background research and look at past examples of how it was solved.
  3. Apply your newly gained knowledge to the problem at hand.
  4. If a new problem arises that is not encompassed by the recently acquired wisdom, go back to step 2.
  5. Report on your findings to others.

Doesn’t this sound like work? Or studying on your own? Or doing a hobby project? How is this any different?

They Don't Make ‘Em Like They Used To!

Being an analog engineer, I’m around “more experienced” engineers on a daily basis. However, a group of younger engineers often find ourselves acting much older than we are, shouting things like “Get off my lawn!” and “Back in my day…” (really, we had a whole list).

Anyway, another common one that comes up is “They don’t make ’em like they used to!”.  Do we as engineers know WHY they don’t make them that way anymore? Of course we do. The lower reliability and requirements for many more people to assemble the devices honestly doesn’t make sense these days. With lower priced labor the world over and low tolerance for waste and inefficient processes, I know I wouldn’t make the proverbial “them” that way anymore. It just doesn’t make sense.

Recruiting In An Emerging Age Of Makers

I’ve started reading resumes from the bottom up.

What does this mean? It means I’m looking for passion. It means I’m looking for interest. It means I look for people who do electronics for fun. It means that classroom experience–while important–is not getting you the job. In fact, quite the opposite. If you’re spending all of your time in the classroom, how useful are you? Yes, understanding the basics are important. But if you’re going to quote me an equation you learned instead of going out and soldering and desoldering components to a board, how will I know that you’re a legit worker that is willing to get their hands dirty? (solder-y?)

I'm at the Open Hardware Summit!

I’m spending the day at the New York Hall of Science. It’s amazing. The venue is perfect. The swag from the OHS people and sponsors is so cool. I’m completely smitten with everyone here. I’m kind of reverting to a childhood state I’m so excited.

Why?

Well, because this feels like the beginning of something much much bigger than me and that I get to watch it unfold in front of me. And participate, that’s key as well. And since I looked for a while for people online and failed and new get to sit in a room with 200 people that do hardware, it gets me excited. These are my people. My nerdy, awesome people.

I'm on EETimes!

So I’ve been at ESC Boston since Monday, both as a participant and as a writer. It’s been a really cool experience meeting a lot of people in the technical writing field and a lot in the publishing industry (as well as those in the technical side of things, of course). And today for the first time, I was published in EETimes on the EELife section. Check out a couple of my articles, linked below.

A September Update

So it’s quite apparent I haven’t been around posting too much. The date on the last post makes that pretty obvious. I have been doing some fun and exciting things though!

First off is The Amp Hour, a new electronics podcast/radio show. We just completed our 8th episode yesterday and it seems to be going well! We were very lucky to have much of Dave Jones’ wonderful community at EEVblog make the jump over and listen to us. It’s nice to have a strong base of listeners to start with and we appreciate everyone of them (I appreciate you doubly if you happen to read here as well!).

Shhh, Don't Tell The Aussie…

I know we said we wouldn’t talk about it on our sites any more, but I figured once more can’t hurt. We have our latest episode of The Amp Hour up on the new website, just waiting to be downloaded or streamed.

I will say though that you should pull the RSS feed ASAP in order to not miss any future radio shows. Who knows what kind of hijinks you’d miss out on?

Part Review: LT4180

A note about part reviews: I do not get paid to do reviews. I am either doing them out of the kindness of my heart, because they have some historical significance (as in the case of my review of the LM741) or most likely I think the technology is important and interesting. All opinions are my own and I would not suggest making any part choices based on the information in this article alone. Read some datasheets, they’re pretty informative.

Follow Up Post: Electronics People Online

I really don’t have much to say in response to my last post about where all the electrical engineer sites are online other than: message boards. I alluded to the idea of message boards when I mentioned EEVBlog, though unknowningly at the time; I thought EEVblog was only videos. Working with Dave on The Amp Hour has shown me that a message board can really help hash out ideas (if you’re one of the content generators), get suggestions, or get questions answered (if you’re watching or reading and don’t understand something).  So I started hunting and found some other quite active electronics-only forums: