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When a coil on plug gets the fire signal from the computer, what strength signal is it?
In other words, since a coil on plug is a mini-coil and needs electricity to charge and then discharge spark to the spark plug on signal, what kind of trigger signal makes that happen?
I'm wondering if a small magneto or Hall Effect sensor would work to send such signal to fire a coil on spark plug ignition, instead of a Motronic cumputer sending such (This for a non-automotive project.)
Last edited by Dash01; 04-30-2017 at 01:47 AM.
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Its a low voltage pulse. The coil gets a ground and 12v and the trigger is a low voltage but im not sure if a Hall effect would work as it wouldnt allow a proper dwell time. Youd be better off using an old distributor coil. The spark when the ground is disconnected and charge when its connected so a momentary switch or a driver circuit and relay would work.
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It's not a signal as so much as it is a loss of a signal, read up on induction coils. Also all you need is an o-scope to measure what your looking for.
https://www.youtube.com/watch?v=UEmSFDn8Rlw
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If you really want to use a hall type setup just use one of the common 7 pin ignition amplifiers with a normal coil.
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Coils charge continuously as the other cylinders are going through the combustion cycle. The coil then discharges on command of the ECU through the remaining wire that you have identified.
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The OP is asking for a non motoring application. Sounds like he just wants a spark on demand
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