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 ?

Ocebe.1 · ‎2021-01-10

MM..1 · ‎2021-01-10

PWM

Ocebe.1 · ‎2021-01-10

How can I change PWM'S amplitude?

Ocebe.1 · ‎2021-01-10

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

MM..1 · ‎2021-01-10

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.