I've gone through the Junkbots book and built a few of the cool robots Hrynkiw & Tilden describe in it, but one of the designs I was especially interest in was the walking robot. First, the video I put together describing the robot and a bit about the building process. Here's a scrapbook version of the building process... The basis for the robot's brain - a 74HC240 octal inverting buffer. Some configurations of inverters. Perhaps not how these inverting buffers were intended to be used, but they yield some very interesting behavior for a robot that mimics life. Two pairs of these "bicore" inverter loops make delayed pulse signals. Great for driving little DC motors that have legs attached. Modifying a little hobby servo motor - basically disconnecting the leads from the tiny PCM processor board inside and adding separate leads so that I can drive the gear motor directly by applying voltage of + or - polarity across the two motor leads. It's just a cheap way to make to DC gear motors. If you'd like to help in my robot building and videos about electronics, you can donate at PayPal! |
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