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Thread: CNP/COP conversion for OEM ECU

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Posts: 111-120 of 182
2015-06-25 17:12:46
#111
Create your own 5V supply with caps and regulator.. The 5V in the ECU runs MAF and TPS .. IMO I would keep all IGN away from those sensors.. Nor add any more load to the ECUs VREF 5V.. Just a thought

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2015-06-25 17:30:25
#112
CNP/COP conversion for OEM ECU
Originally Posted by shagspeed
Create your own 5V supply with caps and regulator.. The 5V in the ECU runs MAF and TPS .. IMO I would keep all IGN away from those sensors.. Nor add any more load to the ECUs VREF 5V.. Just a thought

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+1 I wouldn't add any load to the ecu

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2015-06-25 17:51:42
#113
Originally Posted by shagspeed
Originally Posted by ebinkerd
Here is the latest board. Ive been working a lot on making it as small as possible, and this is pretty much it. Its just under 2 square inches. But a glitch has me bound up at the moment and I am waiting on my new oscilloscope before I can go further.

Once this glitch is figured out I'll start on making a thorough video for everyone showcasing the DIS-SR.



Are you printing your own boards? Or did you turn over the design for manufacturing ? Because it looks really nice...


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Are you writing any firmware for this device??? Or is it all in hardware ??? If not.. Can I order one and just make my own copies???? lol . Seriously though.. Something to consider if your doing all hardware... Make sure you sand down the part #s to protect your intellectual property or some asshole will have them made in china for $0.15c each ... I saw you took the time to blur the images .. So make sure you do the same when you ship them out..
2015-06-25 22:21:15
#114
ic5 looks like an atmel eeprom
2015-06-25 22:58:05
#115
Originally Posted by shagspeed


Make sure you sand down the part #s to protect your intellectual property or some asshole will have them made in china for $0.15c each ... I saw you took the time to blur the images .. So make sure you do the same when you ship them out..


^^^ That's a good idea. IMO


I think having your own 5V supply is good idea also.
Wouldn't having a capacitor and/or 5v watch battery on the board also act as a noise filter for it?
2015-06-26 10:45:35
#116
The 5vref used to power the TPS and MAF is the power source I used during prototyping. It works surprisingly well too. But it wont be a permanent design change. The board does have a 5v regulator built in. I didnt install it on this board strictly for testing purposes.

@shagspeed @zeneffect Wouldnt do it any other way.

In the final run all the chips will be de-identified and the board potted. If anyone wants to try to make a reproduction that bad, they are welcome to it. Potting has the consistency of JBWeld. But the first run boards will be replaced by my new design within a years time. Staying ahead of anyone else will be easy.
Last edited by ebinkerd on 2015-06-26 at 11-00-41.
2015-06-30 09:10:29
#117
So the problem is with my car. For some reason I am getting feedback from the spark event and is causing the board to reset. What is strange is this was not happening when I had the protoboard installed with the ls2 coils. So this past weekend I reinstalled the proto board and ls2 coils, and the board is still resetting. Very strange. I believe I have some rewiring to do.
2015-06-30 16:42:51
#118
Keep at her man, you'll sort it out.
2015-07-24 11:21:54
#119
I have more or less figured out the cause of the glitch. I will be testing a few designs in the next few weeks though and will update this thread when testing is complete.
2015-08-11 09:33:32
#120
New 4 channel oscilloscope came arrived. Can finally start testing new design. So what happened is called a ground loop. Common in stereo systems for those that are familiar. Basically the current return path was interfering with one of the chips on my board. In order to alleviate this, I have opted for digital isolation. The process separates the coil driver from the processor so each part has its own power and ground, with no continuity between them. Thus eliminating the ground loop.
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