Bench Talk

When I was in college, I held 3 part time jobs, of which one of them was tutoring Physics. Not that I was an expert or anything, but someone had to do it. Most of the time I spent the tutoring hours working on my own assignments. All of it is just a blur now, except one person, a nun. She was determined to make a passing grade, and she started coming in about a third of the way through the semester. I quickly figured out that algebra is kind of important to physical laws like F=mA. It seemed so simple to me, so intuitive, so I started out rattling off what force was, mass, and how acceleration played a part. The glazed look in her eyes told me I needed to step back a bit. So we began exploring the mathematical relationship.

I often find myself at the end of the incredulous question, “What are you doing?” My perfunctory responses run from “adjusting the clock” to “checking the charge this capacitor can hold.” The next question often is something like, “Why did you think it was OK to pull wiring out of the wall in your classroom?” or “Why is our microwave in several pieces?”

The 2014 South by Southwest Festival was this past weekend, and I was able to attend with some of my Mouser colleagues. March 13-15 was the Music Gear Expo, where we set up our booth. We were showcasing our Pro Audio line, which includes Bourns' guitar potentiometers and Neutrik's super-cool silentPlug.

In my role I get to try out lots of cool things. However, some of the favorite things that I get to try out are the most practical. Several years ago the U.S. Congress and the President adopted the Energy Independence and Security Act. The goal of this legislation was an effort to move the country to becoming more environmentally friendly. As a result of this legislation incandescent bulbs would be phased out over time.

I spent most of Saturday at the Fort Worth Museum of Science and History for Engineer’s Week. I sat at a table with half a dozen kids at a time, showing them how to connect little DC motors to batteries, and exploring and explaining series and parallel connections for the braver ones. We had several DC motors with a glue stick off center on the shaft of the motor so it would wobble, and velcro attached the motor and battery holder with alligator clip leads to a scrub brush. The result was a giant hex bug popping around on the table. Some kids were very interested in how they could take it further, and others had glazed expressions. For the ones that wanted to go further, I showed them how to connect three 9V batteries in series to feed the motor 27 volts… and it really buzzed. Then I told them we were on the Mars Rover team and had to make sure that even if a lead broke, the rover would still go.

Hello, everyone! My series of posts are going to deal with applications of open source hardware. My goals are to share applications using open source hardware and teach some fundamentals of electronics and software to turn these projects from concept to reality. To make things easy as possible, I will put links to Mouser’s website so you can get parts ordered fast and get to making cool things sooner rather than later.

A decade ago, back when Xilinx’s Virtex®-4 and Spartan™-3, and Altera’s Stratix®-II were new products, it was my job at Texas Instruments (TI) to partner with the leading FPGA manufacturers to produce power management solutions that benefited our joint customers. Multiple power rails, power-up sequencing, tight tolerances, transient response, system reliability, total solution cost, and size – these were all things we were concerned with even then.

Let’s face it: When it comes to communicating, we’re spoiled. We can talk, text, or e-mail nearly anyone we want whenever we want, by simply picking up the phone -- be it wired or wireless. But ham radio can work when nothing else can get through.

Back to the Future 2 is turning out to be more prophetic than we thought. First NIKE announces power laces, and now a viral video from “HUVr Tech” is currently making the rounds claiming to have made the break through we’ve been waiting for for 25 years: A REAL Hoverboard. You can believe it because Christopher Lloyd, Tony Hawk, Terrell Owens and Moby have all endorsed it. And if you can’t trust Moby, who can you trust?

I know there are all kinds of rules against anthropomorphizing the equipment with which you work. It makes you overly attached to it, but I just can’t help it when it comes back with a Fourier Transform like this...