This circuit was found in a 1967 RCA documentation. The components are of the time. The circuit limits the current to 50 mA when the battery is fully charged.
The purpose of the circuit shown in the figure is to open and close the contacts of a relay...
July 2017 - The new TLP240 and TLP241A optical couplers with MOSFET output, manufactured by...
July 2016 - It can be obtained from Mouser Electronics new trinkets Adafruit. These trinkets are...