Hey Guest!
Hey - did you know if you click on the title of a thread it will take you to the first unread post since you last visited that thread?
but were afraid to ask: 
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smilie in place of the real @
Pretty Please - add it to our Events forum(s) and add to the calendar! >> 
Morris
Yoda
Offline
Woohoo! I now have a working tach.
Rather than revive my old topic on this, I am starting a new to make it more "searchable."
Here's how I solved the problem:
1) Using circuit diagrams I found here: https://josepino.com/circuits/tachometer-circuit] https://josepino.com/circuits/tachometer-circuit[/url] I replaced all the caps in my tach.
2) I connected the tach to the PIP signal (pin 1) from the EDIS unit. I was trying to avoid this because I feared noise from the tach might interfere with the signal. The PIP siganl (the signal that tells the Megasquirt/Megajolt where the engine is in it's cycle), but so far, that does not seem to be a problem.
Step 2 most likely eliminated the need for step 1. But when I removed the caps, the insulators crumbled to dust in my hand, so I am certain it was for the best.
Rather than revive my old topic on this, I am starting a new to make it more "searchable."
Here's how I solved the problem:
1) Using circuit diagrams I found here: https://josepino.com/circuits/tachometer-circuit] https://josepino.com/circuits/tachometer-circuit[/url] I replaced all the caps in my tach.
2) I connected the tach to the PIP signal (pin 1) from the EDIS unit. I was trying to avoid this because I feared noise from the tach might interfere with the signal. The PIP siganl (the signal that tells the Megasquirt/Megajolt where the engine is in it's cycle), but so far, that does not seem to be a problem.
Step 2 most likely eliminated the need for step 1. But when I removed the caps, the insulators crumbled to dust in my hand, so I am certain it was for the best.
