This circuit was found in the December 1976 issue of Radio Electronics magazine. The circuit includes a powerful pulsating siren. It is activated by courtesy light switches and other sensors.
This circuit was found in documentation from the 80s. The circuit did not include resistors from...
This powerful transmitter for the 27 MHz band was found in a Japanese publication from 1961. The...
The figure shows how to use a 3-winding transformer to switch outputs with different voltages by...