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  1. D

    Camera filter 455nm bandstop

    Where could I find a camera filter that would be a narrow band-stop for the Arctic Blue laser? I want to do some video work without having the laser saturate the camera.
  2. D

    Surprisingly difficult drive problem

    I need to drive a single Osram Golden dragon IR emitter, with controllable intensity, from "off" to full power. I need it to run from 5V - 10V input. I need the intensity control to be relatively simple, like a variable resistance to ground. Now the kicker: I need it to be efficient...
  3. D

    CR123A cell comparison

    I'm looking for a straight comparison of runtime between CR123A cells in a constant power system. My actual system will be roughly 5W from three cells in series, but I can probably use anything in a similar range of power. Constant current, or fixed resistance discharge curves don't help me...

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