This circuit was obtained in an 80s documentation on telephony. The components used are TTL, and the power must be made with 5 V.
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...