I am looking for a sensor that activates after the clicking noise of an automobile turn signal
I am looking for a sensor that activates after the clicking noise of an automobile turn signal solenoid stops. Similar to the "clap on clap off" device, but activates only after I choose to stop clapping. Or like a heart monitoring circuit that activates an alarm when a heartbeat stops. I would like this circuit to activate for only three seconds then reset. I would like that sensor to be able to clip onto an adhesive pad just like the one doctors use for heart monitoring.
Thank you! Thank you! Thank you!