There are over 50 littleBits modules, divided into 4 categories: power, input, output, wire. The starter kit contains the first 10 below. Get yours at the littleBits store. littleBits is an open source project, and detailed circuit diagrams can be downloaded here from our GitHub repository.
power
Power components provide electricity to the system
input
Input components interpret data or their surroundings - they are the eyes and ears of the system
output
Output components make visual, physical, and audible changes on their surroundings
wire
Wire components route power and communication between the bits
