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Hi
As a megasquirt guy, I have taken the easy way,, use any solenoid vacuum valve with a 1/4 opening,,
Hi Rad, that's a good idea too. Wanna check out the new road course in Palmer next year?
It looks like the only case that might be hard for me is a V8 with individual coils and a stepper motor idle air control. We can put that off for future features. If anyone knows how much current these solenoid idle air thingies draw, please chime in. The unit I had seems to be AWOL at the moment.
The last couple of days I have been trying to tie up some loose ends, sort of literally. I had a big handful of unused pins on the CPU which have been ignored. That is something you should not do if the pins are inputs, so I was planning to turn them off or set them to be outputs in the code while it was booting. I'm having some second thoughts on this so now I am routing them out to resister packs which tie the signals to ground.
There is an advantage to doing this because it means you can get to these signals and modify the board to use them for other things. That's a help when you are getting started on a project and it turns out you forgot something and need to be able to get to it. It's taking me most of 2 days just to take take care of the first half of these though. An amazing amount of time coaxing various copper traces and other little bits a fraction of a milimeter at a time to make space for these other new little friends on the board.
Still hoping to get theses board designs sent to the PCB fabricator next week sometime. Anyone have any opinions on wether I should have just left those pins floating and set them to outputs during the boot. I think I had some fear that there might have been problems caused by that that might interfere with booting especially over the CAN bus. So trying to reduce risks, I guess.