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Ignition signal output waveform for external drivers
Posted: Mon Dec 28, 2009 10:50 am
by gunni
If anybody could help me out.
I´m looking for the waveform of the ignition output signal to the ignition amplifier.
most specifically the voltage. The SR20 manual suggests 0.1-0.2v
But I need to verify this .
So if anybody has an oscilloscope and a few minutes that would be a great help.
Thanks.
Posted: Mon Dec 28, 2009 4:08 pm
by PL
Yeah, it's not a big voltage because it's driving into the "base" of a transistor. Which looks the same (electrically) as a diode to ground. So it'll be a pulse of 0.7v or less.
PL
Posted: Mon Dec 28, 2009 9:33 pm
by gunni
Thanks.
Can I safely assume it´s a square wave and in the square wave is the dwell information?
Posted: Mon Dec 28, 2009 10:27 pm
by PL
Yep.
PL
Posted: Tue Dec 29, 2009 3:34 am
by gunni
Is this true between the various multi coil nissan engines?
I.e they all have that sort of voltage signal to the ignition amplifier?
Thanks for the info though.
Posted: Tue Dec 29, 2009 9:08 am
by PL
Not sure - I haven't scoped them all. But I'd expect them to all be the same.
PL
Posted: Tue Dec 29, 2009 11:28 am
by gunni
Is the signal current driven or voltage driven?
Posted: Tue Dec 29, 2009 12:35 pm
by PL
It shouldn't take a lot of current - as long as there's enough to turn a transistor on then you should be OK. I suspect as long as the voltage was around 1V. You'd only need a small current - under 100mA.
PL