Does anyone have any ideas for a simple circuit to do the following?
I want a circuit that will go from high to low if the input signal drops below 30 Hz. Then go back to high when the signal increases above 30 Hz. The input is a 50% square wave.
Cheap is good. I don't want to use a PIC or get really involved. I do have a supply of 555 timers.
I want a circuit that will go from high to low if the input signal drops below 30 Hz. Then go back to high when the signal increases above 30 Hz. The input is a 50% square wave.
Cheap is good. I don't want to use a PIC or get really involved. I do have a supply of 555 timers.