Found in a 1969 EDN, this circuit uses components from that time. Modern equivalent transistors can be used.
This inverter can reach a power of 300 W depending on the transformer used. In this case, a...
This circuit causes an instrument needle to oscillate to signal an event. The circuit is powered by...
This circuit converts signals from the 350 kHz to 500 kHz longwave (VLF) band to the 4.35 to 4.6...