PWM to Audio Line Level

Forum 2005-2010 (read only) Hardware Interfacing
1

This is probably a simple one, but what (if anything) would one need to do to connect a PWM pin to regular audio amplifier in terms of changing voltage, current, etc.?

Thanks!

2

just put a 1K potentiometer between the PWM pin and GND, and then conect a .1Uf capacitor between the pot's wiper and the audio amp. The pot provides a load for the Arduino, and becomes your volume control. The capacitor blocks DC voltages and only passes audio.
Hope this helps

D

1K pot
PWM pin -----<><><>-------GND
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--- .1UF capacitor
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audio amp input

3

Thanks much - I'll give that a shot.