This amplifier with gains between 5 and 100 was found in the May 1988 issue of Radio Electronics magazine. The circuit requires a symmetrical power supply.
Activating a relay from pulses (from a monostable, for example) can be useful in many types of...
Found in an old publication about neon lamps this circuit works directly connected to the power...
This circuit was found in Motorola's 1966 documentation. HEP556-type integrated circuits can be...