This circuit is from a 1980s Motorola documentation. The circuit can be set to fire from 60 to 120 V DC or from 42 to 84 V AC. The circuit has a forehead button that activates an indicator lamp.
Other operational amplifiers from the same family such as MC34002, MC35001, MC34004 and MC35004 can...
This circuit for 12 V relays was found in the July 1992 Radio Electronics magazine. The circuit is set...
The figure shows how to add a Darlington stage to an operational amplifier in order to obtain a...