Hello,
Have a look at a circuit created by danko on AAC:
https://forum.allaboutcircuits.com/threads/trying-to-make-a-moped-ignition-coil-tester.210360/#post-2033847
Timing might be adjusted for longer times between pulses.
Bertus
Hello taj,
The educypedia has a lot of information on all kinds of electronics subjects:
https://educypedia.org/electronics/electronicaopening.htm
Bertus