Bench Talk

We’re going to jump right in with this blog post. If you haven’t done so already I highly encourage you to read this article about an automated mailbox delivery project I recently completed. Also check out the first blog post in this series that discussed some key lessons learned, including the importance of reading the manual and some thoughts on open source software

What is that in-between place between boring and floundering? It’s that place where you feel challenged, but not overwhelmed. For me Modern Physics is that place. I enjoy going to class. I like reading the material and doing the homework. I find myself thinking about the math and therefore thinking about physics in general.

In a recent article published last month titled Solar Energy Harvesting Project to Power a Remote MSP430 with 2.4GHz Notification, we tried to inspire designers and makers that have limited experience outside of the Arduino microcontroller platform to explore different platforms typically used by more seasoned design engineers.

If National Lampoon’s Christmas Vacation has taught me anything, it’s to not hold back on my insane desire to light up the house one Christmas, regardless of how many lumens get blasted into the neighborhood. A “Griswold” display used to be placing as many lights as your fuses could handle onto your house. As of late, it’s become more creative. A LOT more creative.

Don’t know about you, but I’m always exploring the far reaches of cyberspace to find something out there that speaks to me. Something that makes me wonder and reply, “no freaking way.”

Every now and then you come across a real gem on the internet. My father was a Coast Guard electronics technician early in his career, and it’s interesting to be able to talk with my dad about electronics stuff. This morning he sent me a link to a site with old Broadcasting and Audio Engineering magazines going back to the 1920s. I look at this ad in Figure 1 from Audio Engineering of June 1949 and have to ask: “What is a Triode?” Triodes are vacuum tubes, boys and girls. Isn’t it interesting that audiophile “purists” today would buy these very tubes for a glowing, more thrilling audio experience? Admittedly, tubes are more interesting to look at than solid state.

I had a very interesting conversation with a power electronics specialist regarding charging for electric vehicles. Let me elaborate: Charging for road taxes for electric vehicles. Those rich guys who can afford the Tesla are not paying road taxes like the rest of us. (I will call “us” The Combustibles Group.) And neither are the Leaf folks, either. The incentive in the U.S. is still a $7,500 tax credit for buying an electric vehicle. A tax credit here means that you figure up your bill to Uncle Sam on April 15 and then subtract $7,500 from what you owe.

Like most professions, engineering has developed a language of its own. This is needed to convey very specific and precise information. Fuse design engineers, for instance, make a very clear distinction between an overload condition and a short-circuit condition. (Overloads are in the range of ~200% of the fuse's rating while short-circuits are 10X or more.)

The wearable market is generating a lot of interest at the moment. Recent announcements by Apple, and earlier announcements from Intel and others have generated numerous articles in the major publications dedicated to the tech and retail electronics markets. So what about audio wearables?

When in 1945 Raytheon’s engineer Percy Spencer accidently discovered the potential of RF energy for heating food (or in Spencer’s case, for melting a chocolate bar in his pocket), the device generating that energy was a magnetron. Sixty years later, this venerable “vacuum electron device” is still powering everyone’s microwave ovens, making it the only consumer product still using a vacuum tube rather than a semiconductor for any purpose. However, this last bastion of vacuum tubes in consumer electronics may soon be relegated to history now that RF power transistors have achieved the required RF output power, efficiency, and ruggedness required to replace them.