This circuit was found in the December 1976 issue of Radio Electronics magazine. The circuit includes a powerful pulsating siren. It is activated by courtesy light switches and other sensors.
This high input impedance circuit is suggested by Motorola's 1993 Linear Interface ICs. The power...
The absence of a pulse in the pulse train applied to the input of this circuit causes a high level...
This small amplifier with a low impedance microphone that can be used for hearing aid was found in a...