Found in a 1991 PE Hobbyst Handbook, this circuit activates an oscillator that deactivates at the end of the programmed time. Transistors are commonly 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...