Hello,I use microphone and When I talk I get the data from microphone to eeprom.I want to playback to speaker from eeprom .I think,I have to produce analog signal.But I shouldn't use DAC .How can I produce Analog signal without DAC in stm32 ?

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Chief III

PWM

Associate II

How can I change PWM'S amplitude?

Associate II

In the PWM ,I can change duty cycle and frequency but I think ,I have to change amplitude

Chief III

Or simply use high pwm freq and add to pin properly calculated RC and you get analog wave. For speaker drive you need add an amplifier next.

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