This circuit was found in documentation from the 1980s. Transistors are general-purpose types like the BC548 for NPN and the BC558 for PNP.
March 2017 – Mouser Electronics already has the new Texas Instruments INA260 digital current and...
This tester from a 1960 magazine is only for capacitors with insulation voltages above 200 V (110...
This source was obtained from a former publication for valves but also serves for powering common...