This is a brief breakdown of the proximity sensor stuff for the nano project for the Royal Academy of Engineering.
The proto-board (of which I hand soldered 4) which is used to control 3 1 watt LED's at a time.
The Arduino with it's beautiful wiring.
All 4 sets of 3 lights strung out and finished and working. Well not actually working, they're not plugged in.
The finished bits at the bottom, proto-board, Arduino and the little black guys on stalks are the proximity sensors.
The idea behind this is that the poximity sensors will trigger the three lights when someone gets close, there's four sets of these. Not only this but for super enviro-efficiency, the lighting systems are paired up for power. 6 lights, and 2 Arduinos run off one 12V 3.5A supply.