How can I make a transmitter time-out timer? Answered
I am a ham, and would like to make a circuit that will alert me when my transmission has gone for about 2 minutes and 45 seconds, so that I can reset before the repeater's timeout does. I should be able to get the button press from my headset easily. How can I build a circuit like this that will start when I press the ptt and reset when I release?