Found in Popular Electronics from the 90s, this circuit has LED indicators that show when the battery is full charged and the shutdown relay is activated.
July 2017 - The new Schottky rectifiers from the FMX series for currentes from 1 to 3 A from...
This TTL dice was found in an old American 1980s documentation, but can still be easily assembled....
This circuit uses an operational amplifier to simulate an inductor. The circuit is from old...