This circuit is from an ancient American documentation. The transistors are of the time and the circuit uses a special sensor to detect the trigger point to produce spark plugs.
Suggested by Siliconix in 1980s documentation, this circuit uses currently uncommon components. The...
Based on Radio Shack 276-137, this circuit was found in the December 1995 issue of Electronics Now magazine....
Designed to operate with a video camera, this small transmitter was found in the February 1993...