Ignition signal output waveform for external drivers

gunni · Post by **gunni** » Mon Dec 28, 2009 10:50 am

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.

PL · Post by PL » Mon Dec 28, 2009 4:08 pm

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

gunni · Post by **gunni** » Mon Dec 28, 2009 9:33 pm

Thanks.

Can I safely assume it´s a square wave and in the square wave is the dwell information?

PL · Post by PL » Mon Dec 28, 2009 10:27 pm

Yep.

PL

gunni · Post by **gunni** » Tue Dec 29, 2009 3:34 am

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.

PL · Post by PL » Tue Dec 29, 2009 9:08 am

Not sure - I haven't scoped them all. But I'd expect them to all be the same.

PL

gunni · Post by **gunni** » Tue Dec 29, 2009 11:28 am

Is the signal current driven or voltage driven?

PL · Post by PL » Tue Dec 29, 2009 12:35 pm

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