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.
This circuit for old cars with mechanical ignition control was found in the 1983 Electronics...
This positive pulse extender or stretcher was found in a Popular Electronics from the 90s. The...
This sound relay was found in an American documentation from 1977. The relay determines the power...