Set of 4 roll pins. We use these to fix a sprocket or gear to a 6mm shaft.
Use these roll pins to fix sprockets to a shaft and keep them locked in place.
This is an Enclosed 4-wheel drive remote control robot kit. It uses four powerful wheelchair motors and the inside robot cavity has plenty of room for electronics.
SparkFun's minimal design approach to Arduino. This is a 5V Arduino running the 16MHz bootloader.