Ive been avoiding posting this on here because of the nature of the question and how many different forms of it I asked, but Im having trouble tracking down anyone that has dealt with our setups directly.I know that there are some smart squirters on these boards and im hoping they see this.
right off the bat ....
Im running a ms 1 version 2.2 with the latest spark and extra.
Ive got everything working great however I'm still struggling with my trigger wheel. Ive got a normal steel wheel from diyautotune.com and a 1.9 liter ford escort VR sensor.
we've gone over the fact that the older megasquirt will not natively read the VR signal. So some form of modification to the signal has to be made. I was recomending using the ford EDIS ign module to manipulate the signal.
now what Im trying to figure is if my theory and general idea of whats going on here is correct.
the steel wheel will pass threw the magnetic field inducing an AC voltage the ford EDIS will transform the voltage into a square wave on/off signal, and I will setup the megasqurit to read the wheel as though it was reading a hall senosr with the same teeth. right?
thanks for the help
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boobs now with Riboflabin"
all you need is a LM1815 and bring it the raw VR signals. It will give you a square-wave output. By the way there is no version of the MS that will 'native' decode ANY straight VR sensor's output. The MS2's use the LM chip to do so. Proto it up and bring in the raw signal...it will straighten it out for you.
EDIT: IMHO do not use any more 'modules' then you have to. Putting in another module gives you another failure point. Just wire in the LM and be done with it. Effectively after the filters(be VR or HALL) the MS's inputs all read the same way so to answer your question yes, it you did have the EDIS module convert the signal it would come in on the Hall circuit input to the MS. All the hall circuit really does is protect the circuit input from voltage spikes that may come thru and it has other similar concept filters. The VR has all the same filters + the LM chip prior to the filters which will again do the same thing....protect the proc. inputs. As far as the proc. is concerned, there is no difference between the two conditioner circuits...the input the proc. sees will be the same.
Edited 2 time(s). Last edited Thursday, July 23, 2009 10:22 AM
"Never argue with an idiot. They'll drag you down to their level, then beat you with experience!" -Anonymous
so after a bit of research, does this LM chip require the MS board to be socketed? because I cant figure out where it would go.
"
boobs now with Riboflabin"
You can get one of these:
Dual VR Board V1.1 and use flying wires to connect it. All you gotta do is give it 5V, VR in, GND, and it gives you your nice MS friendly square wave out.
"Never argue with an idiot. They'll drag you down to their level, then beat you with experience!" -Anonymous
