X xiaobai00 New Member Aug 28, 2007 #1 i need help of testing the phototransistor. I do not know how to test and ensure whether its able to work. Please help.
i need help of testing the phototransistor. I do not know how to test and ensure whether its able to work. Please help.
ericgibbs Well-Known Member Most Helpful Member Aug 28, 2007 #2 xiaobai00 said: i need help of testing the phototransistor. I do not know how to test and ensure whether its able to work. Please help. Click to expand... Hi, 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: Jul 7, 2008
xiaobai00 said: i need help of testing the phototransistor. I do not know how to test and ensure whether its able to work. Please help. Click to expand... Hi, 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.