This circuit was found in Philips documentation from 1967. The components are of the time, being transistors like BCY38 for TR1, BC108 for TR3, and others depending on currents.
The battery charger suggested in the figure has its current limited by resistor R1. This component may...
This circuit was obtained from an English magazine from 1979, but can be easily assembled today...
This circuit is used to test SCRs like the ones of TIC series. The simulation shows the power line...