Logic level drivers

http://jbperf.com/quad_ign_inj/index.html

Logic level drivers

Postby Bobbinn » Fri Mar 01, 2013 2:28 pm

I am in the process of building my first MS controller and would like to go full sequential.

I like the look of the ignition / injection board but would like to change the IGBT for the coils into logic level drivers for a VAG spark driver box.

What would the best components to use and what would connect where?

Why ?

well I would like to separate the high current components out of the main case to reduce the chance of noise issues and I have a stack of VAG spark driver boxes so that if a driver failed it would be a 2 minute soldering iron free fix to get me going again.

Nigel B


BMW 2002 with M10 engine.

MS2 V3 Wired for full sequential
VR Crank sensor
Hall cam sensor
Stepper idle control
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Re: Logic level drivers

Postby jbelanger » Fri Mar 01, 2013 2:59 pm

I have this board which has logic level drivers: viewtopic.php?f=8&t=1036#p4389. However, I don't know if the VAG spark driver box requires the same drivers as the COPs in which case that board wouldn't work.

Jean
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Re: Logic level drivers

Postby Bobbinn » Fri Mar 01, 2013 3:35 pm

The board looks great. If it didn't work the worst case is to build 4 BIP 373 into the original spark driver case.

Jean could you please pm me with the cost of a board

regards

Nigel B
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Re: Logic level drivers

Postby jbelanger » Fri Mar 01, 2013 5:10 pm

Nigel,

PM sent.

And you're correct that using 4 BIP373 would work.

Jean
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Re: Logic level drivers

Postby Bobbinn » Fri May 31, 2013 1:20 pm

Just trying to get my setup working. All works fine in the test mode and with a running engine but no spark when cranking. The power to the megasquirt is correct. 9 volts at the coil when cranking, led lights flashing. Battery corrected Dwell 15 ms

However this got me checking a few things. The voltage given out from the driver board outputs is 0.45 volts. Is this not supposed to be more like 5 volts?

Nigel
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Re: Logic level drivers

Postby jbelanger » Fri May 31, 2013 1:43 pm

Nigel,

Yes it should be 5V. Where are you measuring the voltage, what is connected when you make the measurement and how are things connected?

Jean
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Re: Logic level drivers

Postby Bobbinn » Sat Jun 01, 2013 5:08 pm

Ok I now have 5 v from the driver board. In the end it was a simple case of keeping the output on long enough so my multimeter had time to register the correct voltage correctly.


Still wont start, think the blame lies with the vr sensor.
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Re: Logic level drivers

Postby jbelanger » Sat Jun 01, 2013 5:43 pm

Do you have an RPM reading? If so, you should be ok. If not, then that's the first thing to correct.

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Re: Logic level drivers

Postby Bobbinn » Sun Jun 02, 2013 7:34 am

The rpm reading is inconsistant. I've moved the discussion over to aNother forum as I'm sure the Settings for the VR sensor need tweaking.
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