This circuit was found in RCA documentation from the 1980s. The circuit uses LDRs of the time and the 50 uA instrument has zero in the center. R1 and R2 may have 2k2 and R3 10k typically.
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...