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 digital pulse counter offers an LED indication. Its maximum frequency is of the order of 5...
This 1960s Signalite circuit uses two SCRs to achieve full wave control. The trigger elements are...
This circuit was obtained from a Popular Electronics. The component is a UJT. The circuit has an...