I'm looking for a circuit that will connect to a single on/off switch and will send a single pulse when the switch is closed, then another single pulse when the switch is opened. There will be a time delay between the events, but that is controlled externally to the circuit.
There are many 555 circuits that will do the above with two momentary switches but I have to do it with one.
The application is for a device that assesses low functioning individuals by starting a cd player track then turning it off after a time period. The idea is to see if the patient grasps the connection between a button and the resultant action, by restarting the song with the button. The front end is a standard switch latch and timer device used in timer mode. On a button press it closes a switch for a set delay then opens it. As a CD player expects a momentary button press to pause, then another to play, the switch latch and timer does not do the job by itself.
Any advice will be appreciated.
There are many 555 circuits that will do the above with two momentary switches but I have to do it with one.
The application is for a device that assesses low functioning individuals by starting a cd player track then turning it off after a time period. The idea is to see if the patient grasps the connection between a button and the resultant action, by restarting the song with the button. The front end is a standard switch latch and timer device used in timer mode. On a button press it closes a switch for a set delay then opens it. As a CD player expects a momentary button press to pause, then another to play, the switch latch and timer does not do the job by itself.
Any advice will be appreciated.