This switched power supply was found in a 70s documentation. The basic components are from that time. The circuit operates at 200 kHz and has a ripple below 200 mV.
This sample and hold circuit configuration was found in a manual from the 70s. The operational amplifiers...
When the temperature rises above the value adjusted by P1 the relay triggers on. The rated voltage for the...
This circuit was found in Radio Electronics from February 1993. The circuit can be implemented with other...