This circuit was found in a Popular Electronics from the 90s. The circuit has temperature compensation. Coil and capacitors depend on the frequency at which the circuit will be used.
The integrated circuit used in this application is uncommon today. The circuit is from American...
This interesting circuit was found in a 2006 publication. It is a timer that controls the engine...
This other circuit from the June 1968 Radio Electronics magazine has a driver transistor and a...