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Tag Archive 'motors'

Building a Small Robot: Part 4 – Using Senses For Control

Posted in Arduino, Projects on Jun 13th, 2010

We know how to control our 2 motors in both directions and we also know how to use our Phototransistors to detect if an object is close, now we put both of these together to form our robot. In this part we focus more on producing the code as we’ve already put our robot together as below.

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Building a Small Robot: Part 2 – Moving Forward

Posted in Arduino, Projects on May 18th, 2010

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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