I have downloaded the zip for the w/b setup.The parts list has a bunch of numbers and letters.I has no list of parts so I can go to rs and get this stuff.I guess its a list of parts,but I dont know abriviations for copacitors and the like.If there was maybe a decription of parts I could do it.Can someone help me with this.My other quesion is can Craig Moates or someone as talented make a w/b af ratio guage program that reads off the mv output?It could be a guage that displays the actual a/f ratio by bar graph/simulated mech guage/numeric on a notebook pc.

 

 

You could do it quite easily with an A/D converter card, but they won't fit in a laptop. I havn't messed with analog data aquisition for years, so for all I know there's a pcmcia version of an A/D card available now??

 

Two suggestions:

1) Make a little amplifier circuit to get your mV signal up to V-level, then feed that signal in to one of your ECM's inputs, such as IAT, which are not necessarily that needed. Then you could acquire the data and do a software conversion after-the-fact.

2) Wire it in to your joyport. You'll have to read up, but I'm sure you could figure something out. Then again, I think it uses an oscillator circuit to determine resistance. But maybe that won't work.

3) Make some kind of voltage-to-frequency circuit, then you could feed in to the parallel or serial port and count pulse rates.

OK, three ideas. Anyone else? I'd look into (1) first. The mV signal should be easily amplified to V range. They do it all the time for displays and such. I had in mind a similar thing for EGT...

 

The WB board output is already buffered to about 1 v - 4 v range.

Dataq makes a nice little board for data aquisition - 4 channels of A/D conversion; powered off the RS232 port; packaged with low-overhead capture and graphing program (runs on an old 486); all for about $15. Export the file as Excel and do an A/F - voltage look-up conversion there.

Or modify the capture prog in VB and put the look-up table there.

K

 

I agree, that would be an excellent solution! You can buy them online here:

http://www.dataq.com/cgi-local/SoftC...800+1014128673

It even includes an active-x control, so if you know how to program in windows (vb or c++) you could have yourself a pretty nice little system.
So, a laptop with 2 serial ports, one grabing ALDL data and the other logging the WB, software would just create the optimized tables after a bit of driving, and your done!!

 

Sounds good,but what about the parts list?