This circuit is from a 1968 documentation. It makes use of thermistors (NTC) to indicate overheating of charged batteries. Modern equivalent components can be used.
We found this circuit with transistors in a Philips documentation from 1968. The double transistor...
By changing the zener, other output voltages can be obtained for this symmetrical power supply. With...
The circuit has the traditional configuration that can be found elsewhere on this site. This is...