Ignition Coil Driver Wiring Diagram

Here is the schematic diagram of the circuit. The coils which are the basis for ignition coils and alternators have very specific electronic. This is my ignition coil driver using a 12v 40a car relay and including a 500v 22uf capacitor.

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I also include details of how i wired the circuit.

Ignition coil driver wiring diagram. I checked continuity in the coil driver wire from the 4 cylinder coil connector to the pcm and there is continuity with no resistance. The transformer typically has only a dozen or so turns on the primary but many thousands on the secondary. As the basic of this laser diode driver this circuit uses a howland current pump with a current booster. With the engine running i am getting a reading of 13 4 13 5 volts on every coil connector by disconnecting one connector at a time and probing the power feed wire.

An ignition coil or spark coil is nothing more than a low frequency auto transformer with a relatively high turns ratio. I realise there are many videos of relay driven. 800 x 600 px source. Compared with a a switched pwm drivers this simple linear laser diode driver provides cleaner drive current.

It is very comparable in design to the pulse transformers used in other appliances such as fence chargers well suited for high voltage bursts. This video concentrates on coils from an electronic point of view and reading wiring diagrams. Ignition coil distributor wiring diagram size. So the coil driver wire seems to be fine.