Question: would this work with a arduino PWM as input?

[rezreal]

Hi @furrtek

Thanks for this great project! I am thinking about to use it in a setup where the EMW is controlled by an arduinos PWM. Given that the arduino produces 5V pulsed DC vs audio line Vpp AC, would the input circuit still work? I am especially not super sure how C1 would behave.

Thanks in advance,
rez

[furrtek]

Hey, thanks for the message.

If you want to use an Arduino's PWM, I guess you can reduce the circuit to just R3 and C2 with values depending on the PWM frequency. The other components were used to center the audio signal around 2.5V instead of 0V.

[rezreal]

Thanks for the input, I'll give it a try!