This 50 Hz rejector or notch filter was found in a 1975 documentation. Other frequencies can be obtained by changing components. The filter uses a Wien network and must use a symmetrical power supply.
The critical component of this project from a 1988 publication is the transformer. The final power...
September 2016 – At Mouser is available the new N channel MOSFETs PMGD175NEX from NXP for currents of 950...
This series motor control circuit was obtained from an old manual from the 80's. The SCRs must be...