Hello...
I am making a soccer robot. (I've mentioned before) Now I need a Visible Light sensor for ball detecting. (The ball transmitts Visible Red Light) The frenquency is 102Hz.

Can anyone suggest some methods for ball finding? (such as a 102Hz narrow band-pass filter)

This is another problem. I need a motor driver (about 1 Ampere, 4.5 Volts), in both direction (forward, backward). I am using a NPN and PNP darlington as the driver, but it always break down suddendly (I don't know why). this driver is too big and too heavy to use in my robot (you know, my robot is only 22cm in dia.!)

Any suggestion for the driver?


Thanks very much.
Stanley Lio