The Buzzbot idea came to me when i was trying to think what can i do to learn the picaxe uController, something practical, well rather than just flashing Leds and buzz buzzers anyway. What I wanted to do was something robotic that is cheap and easy as I don’t have much of a workshop facility available to me just yet to assemble any bases.
We had just moved house and whilst doing the spring clean of some toy boxes and throwing alot of my childrens toys into thte “garage sale” box I came across the Buzz Lightyear Remote control buggy. Basically a 6 wheel buggy with a psycho looking buzz with missile launchers as hands that raises and releases the missiles. Well the missiles were long lost and what interested me was in using it as the base for my “buzzbot” is that most of the work is already done for me. i.e. I don’t have to build a base and look for motors etc. I just want to get down to the nitty gritty of interfacing the PICAXE into something and playing around with it. Another thing that I think will work in my favour is that the Left and right wheel drives seem to be independant of each other as this thing from memory could turn on a dime, so therefore there must at least two motors, and the necessary driver circuits in place for me to use.
Upon dissasembly it looks as though I was right, a gearbox and motor for the left and right drives (front two wheels on each side are geared , while the rear is free wheeling) also a circuit board with a simple RF Receiver and a heap of transistors, which after some initial tracing leads me to suspect are the H-Bridge Drive implementation for the motors, Left, right and the psycho buzz torso aka Missle launcher (he raises up to fire) woohoo, most of the work is already done.
Man he must be on crack!
Ok since I have now dissected the Buzzbuggy it will now be re-assembled back into the “buzzbot” minus the psycho buzz torso, as I just want to use the base as my test platform for the PicAxe. I now need to trace through the circuit and see where I can tap into for the motor control, and also add some sensors.