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So we’ve got our parts and our motor controller so we are now ready to make this robot move forward, backwards and turn. I’m assuming you’ve put the wheels on the motors, mounted them to your design, used a gearbox if necessary and you do have a motor controller. Plus you also have the 9 volt battery and clip for Arduino.

In this part we will need:

  • Arduino Duemilanove ATmega328
  • 4 x NPN general transistors (e.g. PN100, PN2222)
  • 4 x 6.2K Ohm resistors (10K will do fine too)
  • Breadboard
  • Some wire

Example Schematic below


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