This is my version one eye scanner, built from acrylic and composite plastic sheet. It incorporates a pulse/flash RGB led in the emitter, powered by 2 2 CR2032 coin cells. I'm working on a second more accurate version that will also have a working red LED over the circuit board. I need more juice for that, so I will be using a 12v MN21. It is set in the open position, it was enough of a challenge to fit the electronics in, so no pop-up :lol
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