Megasquirt need help with spark
11-21-05, 03:17 AM
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need help with spark
Hi guys,
Just wanted to confirm my understanding of how the VR circuit works on the rotary. I got a little confused when searching due to everyone mostly talking about the dual VR circuit and just wanted to clear some thing up. If I cut 2 teeth out of my cas 180 out of each other all I should need to do is wire ne+ to pin 24 on DB37 and wire ne- to pin 7 then add 4.7k ohm resistors to the negative leed of the LED's to a 5v source then solder a wire at that junction that goes to its respective point at the ignitors. Then configure it to be 12-1 with a triger angel of 60 and return a would be 12,2 for trger return A and 6,8 for B. The board would have jumpers from VRIN to TACHSELECT and from TSEL to VROUT. No jumper from XG1 to XG2 unles I'm using the stim correct. Their should be no need to solder any jumper to the U4 or CPU going this method correct. And that should do it as far as the wiring of the CAS and ignitors or am I missing something. It should work with nothing else needing jumped or replaced?
Thank in Advance
KC
Just wanted to confirm my understanding of how the VR circuit works on the rotary. I got a little confused when searching due to everyone mostly talking about the dual VR circuit and just wanted to clear some thing up. If I cut 2 teeth out of my cas 180 out of each other all I should need to do is wire ne+ to pin 24 on DB37 and wire ne- to pin 7 then add 4.7k ohm resistors to the negative leed of the LED's to a 5v source then solder a wire at that junction that goes to its respective point at the ignitors. Then configure it to be 12-1 with a triger angel of 60 and return a would be 12,2 for trger return A and 6,8 for B. The board would have jumpers from VRIN to TACHSELECT and from TSEL to VROUT. No jumper from XG1 to XG2 unles I'm using the stim correct. Their should be no need to solder any jumper to the U4 or CPU going this method correct. And that should do it as far as the wiring of the CAS and ignitors or am I missing something. It should work with nothing else needing jumped or replaced?
Thank in Advance
KC
11-21-05, 04:45 AM
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Originally Posted by KC's rx7
Hi guys,
Just wanted to confirm my understanding of how the VR circuit works on the rotary. I got a little confused when searching due to everyone mostly talking about the dual VR circuit and just wanted to clear some thing up. If I cut 2 teeth out of my cas 180 out of each other all I should need to do is wire ne+ to pin 24 on DB37 and wire ne- to pin 7 then add 4.7k ohm resistors to the negative leed of the LED's to a 5v source then solder a wire at that junction that goes to its respective point at the ignitors. Then configure it to be 12-1 with a triger angel of 60 and return a would be 12,2 for trger return A and 6,8 for B. The board would have jumpers from VRIN to TACHSELECT and from TSEL to VROUT. No jumper from XG1 to XG2 unles I'm using the stim correct. Their should be no need to solder any jumper to the U4 or CPU going this method correct. And that should do it as far as the wiring of the CAS and ignitors or am I missing something. It should work with nothing else needing jumped or replaced?
Thank in Advance
KC
Just wanted to confirm my understanding of how the VR circuit works on the rotary. I got a little confused when searching due to everyone mostly talking about the dual VR circuit and just wanted to clear some thing up. If I cut 2 teeth out of my cas 180 out of each other all I should need to do is wire ne+ to pin 24 on DB37 and wire ne- to pin 7 then add 4.7k ohm resistors to the negative leed of the LED's to a 5v source then solder a wire at that junction that goes to its respective point at the ignitors. Then configure it to be 12-1 with a triger angel of 60 and return a would be 12,2 for trger return A and 6,8 for B. The board would have jumpers from VRIN to TACHSELECT and from TSEL to VROUT. No jumper from XG1 to XG2 unles I'm using the stim correct. Their should be no need to solder any jumper to the U4 or CPU going this method correct. And that should do it as far as the wiring of the CAS and ignitors or am I missing something. It should work with nothing else needing jumped or replaced?
Thank in Advance
KC
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