I am building a light sensing BEAM robot as part of an engineering project, but my knowledge on electronics is very poor. I was wondering if someone could help me with the circuit. My robot is going to be light sensing with a touch sensor around its perimeter so that it can avoid obstacles. It is effectively a modern version of the first BEAM robots built by William Grey Walter.
I do not want the circuit to have any microprocessors or arduinos, only transistors. My robot has a steering motor, drive motor, a light sensor and touch sensor (to avoid obstacles) with a 4 x AA battery power supply. I was hoping someone could help me by showing how to wire up the circuit using transistors, with either a circuit diagram or description of some sort. Any help would be great!
Have you looked at JunkBots, Bugbots, and Bots on Wheels: Building Simple Robots With BEAM Technology by David Hrynkiw and Mark Tilden? That has several BEAM circuits and I think there is one similar to the system you are looking for. (I can't check because I gave my copy of the book away a few years ago)
I am not sure that the BEAM philosophy is the best approach for your system. I think I would look at using OP Amps to deal with output of the light sensor. For sure you have a very interesting problem.