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P3D Re: Viewer Circuitry

  • From: Greg Erker <erker@xxxxxxxxxxxxxx>
  • Subject: P3D Re: Viewer Circuitry
  • Date: Thu, 2 Dec 1999 11:52:03 -0700
>For the first feature, I will use one white LED per eye, and wire
>them in parallel so when one burns, the other will still shine.

  If white LEDs are like red and other single
colour LEDs don't they last like 100,000 hours?
So unless you are overdriving them they should
last a very long time.


>The white LEDs I got need 50mA each to maximize their brightness,
>which means the circuit needs to run at 100mA.  That's fairly high,
>so two 9v batteries in parallel is what I intend to try.  It may even
>be the case that if I use rechargeable 9v, they will juice-up when I
>plug the viewer into the wall.  (I'm not sure if this is really true.)

  Wow that seems high. Aren't most LEDs 20 or
25mA maximum current?

Greg E.