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Post by pall on Dec 14, 2007 2:05:42 GMT -8
Hi,
IThere is something i dont quite understand concerning the ignition coil wiring in the diagram for "Car ignition coil driver"
I was under the impression that Ignition Coil for cars, that one side of the primary coil was connected to one side of the secondary coil.
The diagram does not show that... is this correct or do i need a special ignition coil ....?
Pall
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Post by Gary Lecomte on Dec 15, 2007 7:44:03 GMT -8
I was under the impression that Ignition Coil for cars, that one side of the primary coil was connected to one side of the secondary coil.
The diagram does not show that... is this correct or do i need a special ignition coil ....?
Pall
YES, Typically on a car coil, the secondary negative wire is connected to the Primary negative wire.
But this make No Difference to the Operation of the circuit.
It works either way.
Gary
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Post by pall on Dec 16, 2007 2:11:57 GMT -8
Hi Gary The reason i'm asking is because according to the diagram, there is a wire between the ignition coil case and ground (next to the 1N4005 diode) Since my coil and most of them has the primary and secondary wired together internaly, what is the purpose of that jumper from CASE to GROUND... Would'nt that be a complete short...? I mesured the resistance between the case and the connection on the coil and there is not connection at all. I must be missing something...  |
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Post by Gary Lecomte on Dec 16, 2007 7:43:42 GMT -8
YES, If the Car's Ignition Coil has an Internal Connection Between the Primary and Secondary, You Should NOT Ground the Case. That will result in a short circuit, bypassing the Mosfet. Gary ************************************************** Hi Gary The reason i'm asking is because according to the diagram, there is a wire between the ignition coil case and ground (next to the 1N4005 diode) Since my coil and most of them has the primary and secondary wired together internaly, what is the purpose of that jumper from CASE to GROUND... Would'nt that be a complete short...? I mesured the resistance between the case and the connection on the coil and there is not connection at all. I must be missing something... |
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