An opto coupler could be better if audio ground is different from digital ground.
The opto transistor could act as the switch, while the opto LED can be driven by the Arduino pin via a 1k current limiting resistor.
Leo..
An opto coupler could be better if audio ground is different from digital ground.
The opto transistor could act as the switch, while the opto LED can be driven by the Arduino pin via a 1k current limiting resistor.
Leo..