Erel, thks. I know that. But, how can i switch , for example, an LED On/OFF without additional hardware ? Can i switch, for example, USB power pin ON/OFF ?
Fatman, thank you. this solution is known by me. But, ..., i wish to turn on/off an external LED. Mybe over audio port? Or USB - eg. switching USB power pin on/off ? Is this possible ?
Thank you.
The peak audio output is about 1/2V which is too low for an LED by itself. Strat's idea is a good one if you have an external power source. You might be able to use an audio output transformer backwards (for example Radio Shack 273-1380) to kick up the voltage to something an LED would need.
The peak audio output is about 1/2V which is too low for an LED by itself. Strat's idea is a good one if you have an external power source. You might be able to use an audio output transformer backwards (for example Radio Shack 273-1380) to kick up the voltage to something an LED would need.