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November 27th 05, 03:40 AM
posted to de.sci.electronics,rec.radio.amateur.homebrew,sci.electronics.components,sci.electronics.design
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Unusual functions of cheap parts
On Sat, 26 Nov 2005 15:41:27 -0800, John Larkin
wrote: On Fri, 25 Nov 2005 10:52:26 +0100, "Frithiof Andreas Jensen" wrote: "Henry Kiefer" wrote in message ... Do you know of other interesting devices or circuits good for misuse? LED's work both ways, as a light emitter and a photodiode. And optocouplers can do interesting things: Very simple high-voltage opamp, up to 400 volts p-p. Isolated totem-pole driver, from a few volts up to 400. Current limiter. Low-leakage diode, sort of like an LED painted black. John A latch. -- Boris Mohar |
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