Mr. Basic PCB with motor controller
During the first Mr. Basic contest some people had trouble driving their motors because of the current required and because of the low voltage provided by Mr. Basic's 3xAA battery holder. I posted a blog showing a schematic for a controller which DAGU has now produced as a replacement PCB for Mr. Basic.
This controller will work on voltages from 3.6V to 7.2V. Higher voltages can be used if the relays are changed. Although designed for Mr. Basic this PCB can be used on any robot and has room for additional circuitry to be added. This board comes as a kit (PCB and components) so you will need to solder it yourself.