The IGB transistor coil driver system.

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picture! Click me for a big picture!

This system is my own design and there are couple of things I don,t like about it hence the new version.

My main gripe is the closeness if the transistor legs , the darlington transistor in the next one I built has it,s legs twice as far apart, They are about 5mm apart as oposed 2.5 mm on the IGB transistor

as you can see in the picture below.

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The schematic showing the 10uf and 330k resistor timing section that turns off the coil if the engine stops with the sensor over the slot.