Friday, September 21, 2012

Make Your Own Automated Light System Based on Head Count in a Room [DIY]

Make Your Own Automated Light System Based on Head Count in a RoomIf you live by yourself, it's really easy to set up a sensor to turn a light on and off when you leave a room. The problem, of course, is that it does that even if someone else is still sitting in the room. Instructables user RPisces came up with a solution that does a simple head count.

When you walk into a room with Pisces' sensor, his system tallies up how many people are inside, and only turns off the lights once everyone has left. To accomplish this feat, Pisces built a circuit, attached a couple IR distance sensors, a relay circuit, and then runs everything through a simple set of code. It's not the easiest setup in the world, but the Instructable is incredibly detailed on every step of the process.

Room Visitor Counter with Relay Control | Instructables

Source: http://feeds.gawker.com/~r/lifehacker/full/~3/EEB6j7vM5tM/make-your-own-automated-light-system-based-on-head-count-in-a-room

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