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Topic: IR sensor circuit problem (Read 2 times) previous topic - next topic


I would like to do a IR reflective sensor so I constructed this circuit......Why does the circuit no function at all???
What's wrong of this circuit???


.Why does the circuit no function at all???

Lots of possible reasons:-
1) Because you have not wired it up correctly.
2) Because you have the IR source too far away, try it at a distance of less than 10mm
3) Because you are not blocking it with something opaque to IR.
4) You have not specified what sensor that it, you have just drawn it as a transistor.


Also maybe the IR diode and the photo-transistor aren't designed to use the same wavelength frequency?



Are D and Q in one package?

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