Stargate switch

From Electriki
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OK, so I want the switch as they have it in Stargate! Just move the hand near it, and that's it!

I'm implementing it with IR led + IR sensor.

Still to figure out:
* Some transparent (to IR) casing?
* IR led and sensor "tunnel" to isolate them nicely
Hardware revisions:
* First version: Stargate_switch_v1
* Second version: Stargate_switch_v2