Yesterday, 02:03 AM
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#284
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Re: Electronic Distributor Adapter
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Naturally Aspirated
Join Date: Sep 2004
Location: Yatesboro, PA
My Ride: 88' Shadow ES
Engine: 2.2L DOHC Hybrid
Induct: Turbo
1/4: 0.000
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90TurboVan,
You seem to really know what you're doing with all this electronics stuff...I only know some. So I'd like to ask your opinion on something.
I cut this section of circuitry from your schematic for your adapter that fires the neon coil-pack from the TD HEP/Coil signals.
I plugged this circuit into MultiSim and simulated it. And applying just slightly over a volt(I'm assuming your CPU supplies 5v) to the trigger inputs makes their respective MOSFETs conduct. Is this correct?
Now this is the way the coils are wired on my wife's Mazda Protege. They have driver transistors built into them instead of in the ECU. The transistors in the coils are NPN type. I don't have an o-scope. So based on this schematic would you be able to tell how the trigger signal from the ECU functions?
Do you think the trigger is normally HIGH and the coil fires when it goes LOW. Or would the trigger normally be LOW and the coil fire when it goes HIGH.
I do know that a normal coil has power to it normally and the plug fires when power is removed. I'm just trying to design a circuit to put a Neon coil on the wifes Mazda cause it's coils are going bad and they're $100 a piece. I have a couple Neon coils laying around my house and all kinda electronics parts and pieces.
Thanks,
Brad
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