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Coil igniter wiring
Posted: Thu Dec 10, 2009 9:12 am
by warp21
How do you wire a coil igniter to the module? Unless I'm missing it I'm not seeing any real clear information in the manual.
Re: Coil igniter wiring
Posted: Thu Dec 10, 2009 10:37 am
by 24c
You have Logic level Outputs on your Microsquirt Module...if you look under "Driving Coils" in the .info site, and track across to Logic Level Outputs you'll get the idea, but you'll need an ignition driver or a compatible stick coil (igniter).
A better link
http://www.megamanual.com/seq/coils.htm#ls1
Re: Coil igniter wiring
Posted: Thu Dec 10, 2009 11:17 am
by warp21
It's still not very clear on what to do. Can I wire it up like I would on a v3.0 board? 330 ohm resistor to pin 1, coil pin2, ground pin 3 (BIP373)? It doesn't seem like this is correct to me.
Re: Coil igniter wiring
Posted: Thu Dec 10, 2009 6:55 pm
by 800vtwin
Take a BIP373, wire the left pin to the module output, The center pin to coil and the right pin to ground. Then set the spark output to inverted/ going high. (from matt cramer)
Re: Coil igniter wiring
Posted: Fri Dec 11, 2009 2:11 am
by warp21
No pull up resistor needed?
Re: Coil igniter wiring
Posted: Fri Dec 11, 2009 9:25 am
by 24c
Hi
warp21, maybe this will help you...this is a bit of the ignition schematic from B&G info pages...
- Ignition driver for Logic Level Output
- Screen shot 2009-12-11 at 17.19.58.png (26.98 KiB) Viewed 2576 times
As you can see, this is the cased MicroSquirt not the Module, but this is how
Bruce B configured the ignition driver, so he used a resistor too. I used a bespoke driver box off eBay to drive my TCI stick coils using the LLO option, but Bruce's circuit worked fine for me in non LLO mode too.
Hope this helps.
Re: Coil igniter wiring
Posted: Fri Dec 11, 2009 9:29 am
by warp21
Yeah i saw that the Microsquirt used a 1meg resistor to ground on pin 1 of the igniter. I was just wondering if this would be the same way on the Module.
Re: Coil igniter wiring
Posted: Fri Dec 11, 2009 9:33 am
by 24c
I would think so, but it not my area
However at point 2 @ JP5 you have Logic Level Output, if you follow route 1 rather than 3 that the Module board does, you have LLO converted to drive a coil.
Re: Coil igniter wiring
Posted: Sat Dec 12, 2009 1:25 pm
by Bruce Bowling
The 1 meg resistor is there just in case someone configures the ignition output as an input (this would be hard to do... but could happen with a corrupt bootload). If the processor port is an input the pin would float without a pulldown termination, and it is possible (but not likely) that stray charging could activate the coil.
Its a paranoia component that i like to throw in from time to time for personal satisfaction, you really do not need it.
- Bruce