It works! The robot LIGHT-SEEKER was completed
and here ii is.
Here is how it works. It rotates around little by little
and checks for a light source ahead of it.
When it finds a light source it beeps and proceeds
in that direction. After a short distance it checks
if the light source is still there. If so it continues ahead,
otherwise it rotates again and seeks a light source.
Thanks to Bob Neidorff of NEMES for help with
293 H-bridges which worked well with
my DC motor control. However things did not go smoothly until
I put in the diodes to curb the spikes
from the motor coils, etc.