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28th August 2007, 11:56 AM
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 How to test and ensure whether that a phototransistor is in good or poor condition ? i need help of testing the phototransistor. I do not know how to test and ensure whether its able to work. Please help. | |
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28th August 2007, 12:54 PM
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Test using the circuit shown. Use a hand lamp to shine onto the photo transistor, the brighter the lamp the lower V1 voltage will be. This is a very rough test, but you should see a change in V1 between light and dark. Lets know what you get. Last edited by ericgibbs; 7th July 2008 at 12:21 PM. | ||
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Linear Mode
