How to tell if Transistor is open?

bear_phillips

Hi,

I am wanting to hook a BS2 to a sound trigger design I found (http://www.hiviz.com/tools/triggers/triggers2.htm). Is their a simple way for a BS2 to tell if a circuit is open or closed. Using my voltmeter I can tell when the circuit is open, but I don't know how to do the same thing with a stamp.

thanks
chad

Newzed

If your transistor if a 5 volt thing, you can run a line from the collector to an I/O pin via a 1K resistor.· Set the pin to input and then read its state.· if IN pin = 1 then the transistor is open.· If IN pin = 0 then the transistor is conducting.

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Sid Weaver
Do you have a Stamp Tester?

http://hometown.aol.com/newzed/index.html
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nick bernard

by the same token you could sample a higher voltage with a transistor

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