tarun0xe
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thanks for the reply tahmid.... then to turn off the buzzer,what value should I send to microcontroller's pin....a high or a low??...or is there some other way to turn off it..??
in my one similar circuit(using uln2803) once buzzer starts it keeps sounding...and whatever value I send to uC's pin(to turn it off) has no effect on buzzer's operation.....what should I do to turn It off..?? also it starts sounding soon I turn on the simulation, no matter there is a high or low in corresponding pin of uC and then keeps sounding forever. other people also, please give your valuable replies .thanks In advance
If you are using 2N2222 transistor in proteus simulation, it has problems. It is always turned ON.
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