baxterdmutt
Member
I have a ham radio that I need to take the signal via the headphones jack and have it turn the on an external circuit when it in-squelches (when there is audio come through the speaker). I thought I might be able to run it into a rectifier and then use the DC signal I get from that to make a transitor go high and be the switch. It looks like I can get about 2v off the rectifier (well more than the .7v I would need for the transistors base.
Is there a better way to turn on a switch using an internal audio signal?
Is there a better way to turn on a switch using an internal audio signal?