The Dagu Mr. General Mobile Robotic Platform does not include a microcontroller. The sensors are simple but effective. The corner sensors are simple voltage divider. The principle is that the phototransistor works much like a LDR (light Dependant resistor). It is based on original LMR robot Bot 08M which was my attempt at a "Start Here" robot using the Picaxe 08M processor. More importantly he pointed out that your processor should take two readings, One with the LEDs on and another with the LEDs off. This walkthrough will explain how the sensors work, how the eye works, how the servos work and how the code works.
Note: The barebones circuit differs slightly from the Mr. General instructions, so be sure to review the circuit diagrams. Alternatively, you can use a microcontroller of your own choice and use your own programming code.
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