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Control 8 Electrical Devices With Your Parallel Port

Posted by timothy on from the fire-hazard dept.

Michael Williamson writes "A PC parallel port can provide 0 or 5v on 8 pins, individually controllable. This can be used to directly drive LED lights, or with the addition of an external power supply, some switching transistors, and some relays, control 8 higher-powered devices. I've written a handful of example programs that drive a homemade 8-LED display in amusing ways."

1 of 48 comments (clear)

  1. Ummm... by Anonymous Coward · · Score: -1, Troll

    Who gives a shit? Useless info. Oh excuse me, not useless if I want to light multiple LED's from my fucking serial port. Do something useful with all that extra time, Sparky.