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[Dr. Iguana's] experience moving from projects powered by disposable Alkaline cells and linear regulators to recycled Lithium Ion cells using the buck regulators seen above might serve as an inspiration to make the transition in your own projects. The recycled cells he's talking about are pulled out of larger battery packs. As we've seen in the past, dead battery packs for rechargeable tools, … [Read more...]
I went to the last monthly meeting of Sector 67, a hackerspace in Madison, WI. One of the things shown off was a color changing LED light bulb that Menards was clearing out for $1.99. Inside there's two RGB LEDs controlled by an ATtiny13 and powered by an AC/DC buck converter. An ATtiny13 will run you around $1.25 by itself so this price is quite amazing. I grabbed a couple of these bulbs and set … [Read more...]
[Lars] sent in this sweet snake robot that he and [Aske] built for the DTU Robocup. I've seen snake bots before, but I like the concept and the clean electronic design. They used a single AtMega32 controller to generate PWM signals for each of the eight servos, and used a very interesting DC-DC buck converter that's capable of delivering 16 amps.For the curious, the bot won the best design and … [Read more...]
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