It’s been nearly a year since my last experiments with robotics and it was time to do some more. Meet pinky, a fully analog light following robot. This is the first in a series of small “stupid” robots Im building for a bigger project.

 

Pinky

 

 

Pinky
Pinky
Pinky

Pinky uses the CD4093 cmos ic as a series of linked low frequency oscillators. This generates a pseudo random pattern wich drives both the speaker and the motors and keeps things from getting boring. The steering is done by feeding the pattern into a light dependent resistor wich then feeds power to the opposite motor through a TIP122 power transistor. Future plans include a servo controlled flashlight with pre-programmed patterns and some more variations with other synth circuitry.