This 80's Exar circuit has a carrier detector for frequencies up to 500 kHz. The circuit uses a company 567 which is still a common component.
This circuit senses two-way currents serving to monitor battery charge and discharge. We find it...
We found this transformer-isolated control circuit in a June 1995 Electronics Now. The triac must...
Found in a Popular Electronics from the 90s, this amplifier uses an operational amplifier of the time....