Here is a schematic I found on the net.
The power FET is rather old dating back to
2011. More recent FET's have lower on resistants
and would be more efficient. Typically they cost about $5.
This FET is the heart of the system.

All the switching circuits are in one low cost chip.
Which greatly simplifies things especially the circuit
board. Vastly reduces the cost.

You will need to wind your own toroidal transformer
which is time consuming for 500 turns. You might
find on off the shelf with the proper ratio.

You could add another FET switch for the second coil.
No need to build two 400 volt supplies.

This would be a huge reduction in cost for a rotary
CD ignition system.


If anyone wants to go into the rotary ignition biz let me know.

Paul Lamar


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