This is the traditional voltage follower configuration with the 741 operational amplifier. The circuit is from 1976 documentation and the power supply must be symmetrical from 6 to 15 V.
Found in Popular Electronics from March 1967, this circuit uses contemporary germanium...
The voltages in an adjusted range in the trimpots are indicated by 3 LEDs. The LEDs indicate when...
This charger for a maximum current of 15 A was obtained from an American 80's schematics. The triac must...