closetoon -> RE: Electrical Switch needed (7/17/2009 5:58:07 AM)
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Solid state relay hanging off an old parallel port or serial port? Low end Atmel microcontroller (no crystal) with transistor and relay or solid state relay? JFET input operational amplifier, 555 timer (set to minimum interval), and a short antenna to make noise? For fun you could use the person as the noise source. Really the parallel port or serial port would make this really easy. A second runner up would be a USB control board on a PC. Could also use a USB to serial or parallel converter. Do you need to adjust the maximum and minimum interval? If you do, you could use 2 potentiometers, 2 rotary shaft encoders, or 2 rotary BCD/binary switches (this limits your adjustments to 9-16 positions). Course you could just press a button over and over to increment up or down. Toon If all else fails, drop me a line...this isn't a hard thing to set up.
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