Found in a 1965 Electronic Design, this circuit divides the frequency of a 50 MHz signal by 2. The circuit makes use of period components and the signal power can be between 7 and 125 W.
This two-tone buzzer can be powered by a solar panel. The circuit is from a 1991 documentation. The...
The integrated circuit shown in the figure is nothing more than the LM386 sold by Radio Shack,...
Found in a Radio Electronics from the 90s, this circuit converts analog TV signals from RGB to...