This simple latching alarm circuit using CMOS gates was found in the May 1990 Radio Electronics magazine. The supply voltage is dependent on the relay.
This circuit consists of a power audio amplifier used in the modulation of AM transmitters. The...
This circuit was found in the August 1994 issue of Electronics Now magazine. The 4046 is uncommon...
This circuit simulates a low-level siren and can be supplied with voltages from 5 to 15 V....