The C3 Prototype Board Kit mounts onto the Propeller C3 Board. Some assembly is required, including soldering of capacitors and connectors. Surface-mounted LEDs and current-limiting resistors come pre-assembled. Power availability is made through the connectors which provide +5V DC, +3.3V DC, and GND on the Prototype Board from the C3.
The board dimensions are identical to the C3 computer itself.
Download Propeller C3 Prototype Board Diagrams