beatle by sophon

I Called this  BEAM Robot "The Beatle". My intention is to make this BOT to very very tiny and
pretty size and convenient for buying the materials in Thailand. 
This Robot can walk follow the light beam. it used 4 Phototransistor sensors for forward
and backward . The IC 74HC14  is used to opamp the photo sensors and driven 2 motors. 
The wheels were modified from small 3V gear-moters. The powersupplyis used 12 Vdc 
battery on 23A and use 78L05 regulator to reduce to 5 Vdc.
 
Email: hs7nbl@hotmail.com