The Neuron is a learn to solder kit made for the 2012 Kansas City Maker Faire. On the surface it's just another easy to assemble "my first soldering project" blinker, but put a few of them together and you can make a light and touch reactive light show!

It functions as your typical alternating LED blinker with a jumper in place, but remove the jumper and they mirror pulses of light detected on one LED to the other. Chain a large set of them together and they'll activated each other in sequence. They're also bi-directional so you can send a pulse one direction in a chain and send another back the opposite direction. A single Neuron firing can activate more than one Neuron, forming branching light shows as well! You can even use one in blink mode to act as a convenient light pulse source.

This item is JUST THE PCB for the Neuron. You still have to source all the parts to make it work (see the below documentation link for schematics and BOM to see the parts you'll need and the firmware you'll need to build your own).

Source files and video links can be found here: http://www.thingiverse.com/thing:31229

Full assembly instructions can be found here: http://www.built-to-spec.com/blog/kit-instructions/neuron-build-instructions/