Found in an American publication of 1968, this circuit makes use of a pilot light of the time. It can be replaced with LED with appropriate series resistor. Transistors may be modern equivalents.
This circuit, which has a power of a few tens of microwatts, is suggested by Maxim. The circuit has a...
July 2017 - Texas Instruments' new 3 A bq25601 single cell battery charger can be found on Mouser...
The purpose of this circuit is to monitor the output voltage of a power supply. The under and over...