I have bought 2 cheap walkmans, took off the gears and motors and made 2 gear motors to power a bigger robot. This one is a robot with 4 stacked 74HC240 chips. It has 2 feelers which lets him avoid obstacles and 2 IR photodiode eyes to follow the light source. I will prepare and post the circuit soon.
28 Mart 2008 Cuma
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