Hobbyists love to use low cost DC gear motors, but are often worried about spending up to 5 times the amount on the motor controller. Don’t worry! RobotShop offers a range of low cost, low power dual motor controllers, and our selection is growing fast.
robotshop.us/Images/small/en/dfrobot-4-8-46v-2a-dual-motor-controller-T.jpghttp://www.robotshop.us/Images/small/en/picaxe-8-pin-driver-board-T.jpgrobotshop.us/Images/Small/en/pololu-micro-dual-serial-motor.jpg
http://www.robotshop.us/Images/small/en/pololu-qik-dual-serial-motor-controller-T.jpgrobotshop.us/Images/Small/en/rogue-robotics-dual-h-bridge.jpghttp://www.robotshop.us/Images/Small/en/solarbotics-l298-motor-driver-kit.jpg
If you are using the popular Arduino microcontroller:
robotshop.ca/Images/small/en/adafruit-motor-shield-kit-arduino-T.jpghttp://www.robotshop.us/Images/small/en/dfrobot-arduino-compatiable-motor-shield-T.jpgrobotshop.ca/Images/small/en/sfe-ardumoto-motor-shield-for-arduino-T.jpg
If you did not buy an Arduino yet, consider the ROMEO:
robotshop.us/Images/small/en/dfrobot-romeo-all-in-one-microcontroller-T.jpg