I had to add a .1 mF and a 47K resister.
I suddenly realized that in the remote chance a magnet stopped in front of a hall sensor
the IGBT would stay on and burn out the 1K 25 watt resister or maybe destroy
the high voltage power supply or IGBT. Something would have failed.

The 47K/.i mF combination  circuit is called a half one shot.

It will not pass DC. The engine must be turning over however slowly for it to work.

That is one thing Hall Effect sensors do that VR CAS sensors do not.
Not enough however, to not use Hall Effect CAS sensors :)
They put out full pulse voltage at near zero RPM.

Paul Lamar

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