The Digital Switchover.

Not me. I almost did that a while back, but no. Not me.

Television.

Normally I wouldn’t write about it. A digital television standard is long overdue and in the end this will be a good thing. When you compare Analog vs Digital, there are many more benefits on the digital side of things: lower power for transmission, better bandwidth of signal, more bandwidth usage over the spectrum. All of these are good things. I can even talk about how those digital signals still have lots of analog components as they’re transmitted over the airwaves: multipath, signal loss, power calculation, reception problems, etc.

One of the best parts of working with others interested in electronics is having similar hobbies: namely, electronics and music.  And even though I have similar hobbies, I never really brought them up in conversation with co-workers (believe me, some of the stuff I have done pales in comparison to some of the people I work with). However, in the past few weeks it has really paid off talking about my non-work work, both for my personal hobbies and for things to write about that interest me.

If you are an engineer who regularly works with your hands, you likely troubleshoot on a daily basis. It’s just part of the job. Sure, you can say, “I never mess up!”, but hardly anyone will believe you. Because even when your best laid plans go perfectly, Murphy’s Law will soon kick in to balance things out. We learn to deal with these things and have developed tools and measurement equipment to help us diagnose and deal with these problems: Multimeters, Electrometers, SourceMeters, Oscilloscopes, Network Analyzers, Logic Analyzers, Spectrum Analyzers, Semiconductor Test equipment (ha, guess I know a little about that stuff)…the list goes on and on. But what has struck me lately has been that as parts on printed circuit boards get smaller and smaller, troubleshooting is getting…well….more troubling.

Analog. Digital. Continuous. Discrete. Choices abound.

Well, not really.

In reality you will deal with both kinds of signals when working on just about any electronics these days. A simple example is in a switching regulator. These devices are meant to take input power from a wall plug or something providing a relatively constant voltage and then the regulator will ensure that the voltage is always the same when leaving. Internal to the circuit, a “digital” signal (on or off) determines when to let in incoming power go from the input to the output. The “digital” signal translates into an “analog” voltage at the output, hopefully the voltage you programmed.

I am not a perfectionist. I think of myself as too practical to be a perfectionist.

However, I find myself setting very high expectations for myself and I don’t feel I am alone. Generation Y has always been encouraged by parents and others every step of the way. We have been told we can do anything and more drastically, we can do everything. We have been multitasking since kindergarten and over-scheduled ever since. We played the most little-league sports, we took the private music lessons, we had the private language tutors, we were boy scouts. We had the most extra-curriculars on our college applications, we had the best grades we could, we took all of the AP classes and we applied to more colleges than we’d ever need to. We took the most engineering credits, studied as many hours as we could stand, we drank during the remaining hours and we graduated with as many minors as they let us. We had the most interviews as our schedules would allow, we got the most job offers, we had the biggest signing bonuses and we got the fanciest job. We expect the biggest promotions at work, the biggest pay raises, the best benefit packages and the best of everything.

I am very excited to announce that the Wurlitzer 200 is fixed and operational. I say Wurlitzer 200 instead of 200A because a nice chap emailed me and let me know that I actually had an earlier model. Either way, it works and it sounds delicious.

Really this post is to gloat a little and to post the sound samples I recorded with my friend Joe. He is a great piano player and shows off the awesomeness of the Wurly better than I ever could. I also wanted to lay out some future posts about the Wurlitzer that I plan to write:

Engineering parents don’t tell their kids to study engineering for lots of reasons. One of the biggest reasons is that they don’t understand what engineers do. There aren’t really any television shows that explain it. It’s not sexy enough for Hollywood. There really just isn’t much information to the general public unless they are looking for it. I know I didn’t have much access to this info before seeking it out. And I know how it feels to have people nicely shake their heads and smile when I explain what I do at parties.

In a down economy, there is always focus on low cost. Job cutting, project re-definition, scaling back expenses, finding new sources of parts, all of these actions can lead to lower costs and help businesses stay alive in crappy economic climates. I think that the average (electrical) engineer can’t but help to let this mentality creep into other parts of their lives. In fact, I think the best engineers enter the profession and excel with this mindset. This revelation about engineering penny pinchers may have been stumbled upon by myself after being accused of being overly-thrifty a time or two. I don’t mind it though; I think maintaining a mindset of low cost is good for my work life and my personal life.

“I wouldn’t suggest engineering as a career path for my child.”

So you’re an engineer. Maybe you have been for a long time and you have put up with a lot of grief. But still…Would you really tell your kid not to go into engineering?? Apparently 1 out of every 3 electrical/electronic engineering parents or so are. And while these numbers are better than the ridiculous ones I had first thought they were (more like 2 out of 3), they are better than the numbers coming from non-engineering parents (only 20% encourage their children to go into engineering, though it is likely ignorance). I can’t stand it. Why? Because it’s followed by stories about the US not having enough engineering talent. Then that story is followed by a story about H1B visas. Then THAT story is followed by a commentary about someone lamenting the situation with international workers. But it’s worst when I see it on message boards and comment sections and on blogs (see all the comments on the survey page and just about any other article on EDN or EETimes these days). Then I realize it’s not a statistic. It’s actually people telling their kids why they shouldn’t go into engineering.

A background

Switching regulator, buck converter, boost converter, SEPIC, flyback, push-pull, buck-boost… do you know what the heck these things are??? Because I sure didn’t when I was getting back into analog electronics. Now thanks to new interest in power efficient electronics, they are starting to come front and center on the electronics stage. Hopefully this article will give you a better understanding of what they are, what they do, where to use them and issues with noise.