Circuit properties:
- detects whether there is an active (audio) signal (amplitude/mV?)
- after a certain number of seconds/minutes of inactivity, it turns the equipment off
- after detecting activity, it turns the equipment on
The timing part can be done with a simple logic circuit and a counter, so all that is needed is a circuit that sends a (TTL-compatible) signal, e.g., activity = HIGH, inactivity = LOW.
What kind of voltages are we talking about with an amplified audio signal?
- detects whether there is an active (audio) signal (amplitude/mV?)
- after a certain number of seconds/minutes of inactivity, it turns the equipment off
- after detecting activity, it turns the equipment on
The timing part can be done with a simple logic circuit and a counter, so all that is needed is a circuit that sends a (TTL-compatible) signal, e.g., activity = HIGH, inactivity = LOW.
What kind of voltages are we talking about with an amplified audio signal?