Argh...................
Might need some more work on the traces by the looks of it to my untrained eye :P
A LOT MORE WORK, hahaha
Like this much work
I'll say that looks better :)
Think I've settled on this.
uMAX10 to DIP10 adapter. So at least people can debug the chip with an easier way to verify pin connections.
IC1 is still on top, so it dissipates heat, not that there is any.
032 for +5V everywhere, so its good up to 1A.
C4/C5 0.1uF / 1uF +5V filtering, not that the Arduino +5V needs it.
Is there a ground plane that's not really visible here?, it looks as though C6, C7, the 16mhz crystal caps are only connected on one terminal, ditto for C1, C2, C4, C5, and the center terminal of IC1.... and that JP2 #1 and #2 aren't really doing anything (future use?).. I will have to go out on a limb and say there's a ground plane I'm not seeing somewhere?
Dashed lines around the PCB, red and blue = purple, are the top and bottom ground planes
OK, I figured there was a ground plane that wasn't visible :)... it would suck badly if you made a board and forgot to connect half the components :P Carry on then :)
Time to build one!
you mean two :P
working design!
Nice job!.. are you crosseyed yet?
I was wondering how you're interfacing the VR sensor and what sort of input conditioning you have on it
Specialty VR sensor IC, 10k resistors into 100nF cap. I believe it is A2 mode on the 9924
It's a robust chip, I think it goes to 1MHz.. heh, but the noise immunity is pretty much why I picked it.
Official non-proto 1.1 through holes come in tomorrow.. pretty stoked about seeing them in matte black
https://www.fedex.com/apps/fedextrack/?tracknumbers=640543510398&language=en&cntry_code=us
OK, that's what I figured.. I was looking at a 9926 (2ch) and wondering if I really needed it.. thanks
I wouldn't use it unless you want to alter the FreqMeasure library to use more than just pin 9 for counting...
Stick with a 9924, count shaft speed, and use some other ways to count other not super fast things that rotate. Like our rpm LOL
Since I've got the Mega, I've got 5 pins with interrupts on them.. I only increment a counter in the interrupt, so it's really fast, and then when I read my inputs I figure out what it works out to in RPM... I plan on using the same logic for the TSS, and vehicle speed sensors as well if I hook it up... I have to read the FSM and figure out if I can tap into the speedo signal, that may already be a 12V square wave, which would make life a lot easier, and it probably counts slower than the ABS ring too
hakcenter,
I have to say thank you for all you are doing and have done on this as I have been wanting to pursue this project for a long time and just did not have the knowledge / experience. I have looked at your links to mouser and pretty much everything else I can find, but can't seem to find where I can order one of your boards?
Everything is getting ahead of me being able to set up a shop for them lol.
I made PayPal buttons last night. Email me directly
[email protected]
Will do, and thank you!
i really like the idea of a discrete set up just for the turbo. Hopefully as i learn more i can set up other boards for additional ideas.
Paul
You think you could post the eagle files in the Wiki? I'm trying to find what pin the turbo RPM input comes into.. do you have anything to sense engine RPM? I'm trying to get a barebones thing working.. I've been slacking.
Also, though it belongs in a different section, is there *anything* you can read from the VGT unit.. I'd like to make sure my comms are working, at this point I'm not getting any motion happening, and would like to try and read something from it if I CAN.... Otherwise I'll start calling it the CAN'T bus
never snooped, don't think it has anything useful
turbo rpm comes in on digital 8, forced by the FreqMeasure library
I jumpered pin 8 to pin 3 (or was it 2?) so I could use an interrupt.