I built this circuit using a relatively small two wire ignition coil.
When I ran the circuit, no spark occurred meaning I believe the secondary coil was open. As mentioned in the video below, an open secondary can damage the coil from carbon tracking ect. Do you think the coil is damaged? I ran the circuit for around 2 min max (in intervals).
It’s worth noting that the capacitor I used was a diy job, and I believe the capacitance was around 5nf.