Light following robot circuit board on attiny25v not very complicated circuit Lithium-polymer battery provided with the circuit feeding the tiny H-bridge output (2N3904) drive motors are controlled with two LDR light is perceived. As… Electronics Projects, Light Following Robot with Atmel ATtiny25 “avr project, microcontroller projects, “
Light following robot circuit board on attiny25v not very complicated circuit Lithium-polymer battery provided with the circuit feeding the tiny H-bridge output (2N3904) drive motors are controlled with two LDR light is perceived. As you can see in the pictures material placement and cute 
quite well also in the video seemed to be running very stable robot.
LIGHT FOLLOWING ROBOT PROJECT
The materials used in the robot at half;
Attiny25v (microcontroller)
MPC1700 (3.3v regulator)
2X LDR
2X 10 kOhm resistor
2X 470 ohm resistor
2X 2N3904 transistor
2X 1N4148 diode
100nF capacitor
100uF capacitor
Lithium-polymer battery 3.7 V 100 mA
2X Fuse holder
Pager motor 2X
Heat-shrinkable sleeving
rubber tubing
6-pin ISP connector
Atmel attiny25v following robot project with the source of light c eagle pcb software and shared schema files Source: http://tinkerlog.com/2009/07/24/tiny-braitenberg-vehicle/ alternative link: light-following-robot-with-atmel-attiny25.rar alternative link 2: Light Following Robot.rar