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My Schematic for DB37

 
Old 10-17-2016, 06:38 PM
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Default My Schematic for DB37

Reverant:

I have (I think) consolidated all of our conversations, plus other info, into this schematic. Reference, MS3-Basic S/N 12616

1) Thoughts on the Rectifier to allow for Cold Start tuning. It is a 10A unit with 0.7V forward bias drop and at least 40V reverse withstand.
2) I think I have the G5 ground as shown, but can put it to (2) or (21), as you might recommend. Wherever I have it now has been working fine.
3) I think I have things correct as to what sinks current and what needs to be pulled to ground.
4) Do I have things correct to work and not hurt anything?

I plan to finish wiring this week, finally.


Last edited by DNMakinson; 10-17-2016 at 06:50 PM. Reason: Had an extra line going to the LC-2
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Old 10-17-2016, 06:50 PM
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Serial box and switches, use ground #3. #21 is the same as #2.
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Originally Posted by ninerwfo View Post
The “into to megasquirt thread” mentions that the MS3 basic has 5 inputs with built in pull up resistors - and I was just wondering why it would have so many, while the MS3Pro PnP has just 2 (with no pull ups?)
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Old 10-19-2016, 03:39 AM
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I have some conflicting information on PT4: Pin 13 (red) connects to PT4. To activate this input, do I apply 5V, 12V, or pull it to ground?

Actually, I may just use Nitrous In, which I understand is +12V input to turn on and off SDLogging. Using 12V simplifies wiring to my combo switch/ light. Still, I'd like to understand PT4.

2nd question: To get the SDCard logging LED to light. I set up the Nitrous 2 as shown below:


But what should I put in the <>= dropdown, and what value in the threshold?

Last edited by DNMakinson; 10-19-2016 at 07:18 AM. Reason: Added note about Nitrous In.
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Old 10-19-2016, 01:22 PM
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Reverant,

Thank you for your patience. I found that you have answered many of my questions in the past. It has taken me so long to get around to implementing my plans, that I forgot the answers to some items.

SD input and SD light output is controlled on the SD logging panel, not the I/O panel I show above.

PT4 is set up to be pulled to ground for input. It requires a momentary contact switch to control the SD Card.

If you would grace me, I only would like to know if Nitrous In is indeed set up to respond to +12V input?

With that, I will republish my updated diagram and be done.
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Old 10-19-2016, 05:28 PM
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Nitrous_in is a "Ground to activate" on all my MS3s.
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Originally Posted by ninerwfo View Post
The “into to megasquirt thread” mentions that the MS3 basic has 5 inputs with built in pull up resistors - and I was just wondering why it would have so many, while the MS3Pro PnP has just 2 (with no pull ups?)
MS Labs: Plug and Play Megasquirt ECUs for ANY 90-05 Miata (NA, NB1, NB2 w/VVT, MSM), including basemaps to get you started ASAP. PM me or email or details.
For support on MS Labs ECUs: Please email, be sure to include the unit's serial number and include a datalog and your current map.
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Old 10-19-2016, 06:33 PM
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I thought the firmware it was setup for 12v to activate. Did this change recently?
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Old 10-19-2016, 08:40 PM
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Originally Posted by aidandj View Post
I thought the firmware it was setup for 12v to activate. Did this change recently?
I ran across a conversation between you and Brain when you were looking for more outputs. There was confusion then on what Nitrous_In might or might not do. Brain said something about adding a pull-up before the switch, which didn't make much sense to me.

Anyway, that is why I asked Rev for clarification. That, and the fact that he does what he wants to do.

IIRC, Brain suggested you use some main board JS outs, but I'm not sure I followed how he suggested you modify to protect the Micro.

I was going to have that conversation with Reverant, too, as he suggested to me in the past that I could obtain some more LED outs for warning lights. Right now, I think I'm happy with what I will have, especially since LOOPS.
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Old 10-19-2016, 08:43 PM
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I used both js4 and js5 but for inputs.

I know that Rev has moved to the standard firmware instead of the old custom firmware. So i'm not sure. Good news if you can now use it as a ground switch.
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Old 10-19-2016, 08:51 PM
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I have plenty of Inputs. I am poor on outputs. What I am doing is a single light for CLT temp low, CLT temp high, and Knock pull timing. It could make sense to separate the Knock, but there should not be overlap.

My understanding is that the MS3 Basic is std FW. I'm not sure about the Enhanced and Extreme.
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Old 10-19-2016, 08:53 PM
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What about all the spark and injector outputs you arent using?
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Old 10-19-2016, 09:19 PM
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Good point. As I'm not a builder, I don't know what is involved in making them usable. I have the skills, but not the knowledge or experience.

I'm also to the point that I don't want to postpone getting the car on the road any more.

Realize, too, that Rev uses a custom mother board that does not have a wired patch bay. That might not matter, I know one of the boards has lots of empty spots that transistors could be mounted in, so maybe not hard to accomplish.

You've got me thinking now.
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Old 10-19-2016, 09:26 PM
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With an ms3/ms3x or ms3pro you have access to all 8 spark and injector drivers. Which would pretty much light up your whole car if you wanted to.

No idea what revs units have. You can always use the ms3 daughterboard card connectors and build your own circuits. Unless he uses those up too.

Would be good if he had more documentation.
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Old 10-20-2016, 03:23 AM
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The 8 injector drivers are used for the injectors, fans, A/C, VICS/VTCS.

Only 4 of the ignition drivers are used. The other 4 are "available" on the ribbon cable.

The Basic MS3 is - as the name suggests - a basic MS3. This means it's not expected to have TONS of I/O connected to it on a Miata.

If you need something like that, consider the Extreme MS3, which has 12-15 spare outputs; ie after everything (including sequential injection and ignition, fans, alternators, A/C, every stock ancillary, are controlled) you still have that many outputs left. Same for analog and digital inputs.
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Originally Posted by ninerwfo View Post
The “into to megasquirt thread” mentions that the MS3 basic has 5 inputs with built in pull up resistors - and I was just wondering why it would have so many, while the MS3Pro PnP has just 2 (with no pull ups?)
MS Labs: Plug and Play Megasquirt ECUs for ANY 90-05 Miata (NA, NB1, NB2 w/VVT, MSM), including basemaps to get you started ASAP. PM me or email or details.
For support on MS Labs ECUs: Please email, be sure to include the unit's serial number and include a datalog and your current map.
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Old 10-20-2016, 03:24 AM
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Btw I convinced James that we need more loops; he said the new firmware versions will have 8 loop channels. Yay.
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Originally Posted by ninerwfo View Post
The “into to megasquirt thread” mentions that the MS3 basic has 5 inputs with built in pull up resistors - and I was just wondering why it would have so many, while the MS3Pro PnP has just 2 (with no pull ups?)
MS Labs: Plug and Play Megasquirt ECUs for ANY 90-05 Miata (NA, NB1, NB2 w/VVT, MSM), including basemaps to get you started ASAP. PM me or email or details.
For support on MS Labs ECUs: Please email, be sure to include the unit's serial number and include a datalog and your current map.
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Old 10-20-2016, 07:53 AM
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As promised, Updated Info.



Thanks for your support.
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