Office of Steam Forum for Model & Toy Steam Gas & Hot Air Engines

This protection circuit won't fix or repair an already blown or damaged hall sensor or module & is intended to protect & extend the life of a good  working sensor-ignition module. As prev mentioned, i added the parts to a new, never been sparked ET1 engine with the upgraded black potted module With dedicated ground wire lead. I carefully power up the unit just long enough to verify the Hall sensor wiring polarity Without sparking the unit. So far all is good but you never know with unknown "black" boxes & >10 kv sparks !!