Sound Generator using PWM signal

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dear all,

i looking simple working circuit sound generator using pwm signal.

i have speaker 8ohm, 100-100000khz,0.8w-3w operating frequency.


my end application this. if fault being detected speaker produce sound using pwm signal.

actually  have tested speaker using um3561 tone generator. working without issue. tried provide power through mc based transistor control circuit . found dip in voltage.
with um3561 ic speaker operated @ 3v


https://forum.arduino.cc/index.php?topic=164436.0

i have tried simple circuit , if give 5v produce small hissing sound.

can suggest best way control speaker pwm signal.



you run pwm signal through low pass filter, extracts audio. put audio signal through pre-amplifier etc.

on other hand, if noise want in audio, don't filter pwm.


Arduino Forum > Using Arduino > General Electronics > Sound Generator using PWM signal


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