This circuit has its frequency controlled by a 1MHz crystal. The circuit must be powered by a voltage of 5V. The capacitors must be ceramic. The generated signal is rectangular.
The circuit shown is from the National Semiconductor FET manual. Both operational and FETs admit...
This circuit is a version of the previous one, but with full wave control. The diodes must be...
This circuit is from the time when cars used contact breakers. This 80's version measures the dwell...