Prometheus - NEW compact ECU shield!

Hardware inside and outside of the ECU
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andreika
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Re: Prometheus - NEW compact ECU shield!

Post by andreika » Mon Mar 19, 2018 1:42 pm

puff wrote:
Mon Mar 19, 2018 12:06 pm
the question is what's the impedance of fuel meter (300ohm pullup to 12V rail + 0 to ∞ pulldown)
Without opamp (i.e. VIGN) the readings will be somewhat inaccurate. You may try increasing the resistance of the divider from 2k/10k to 20k/100k - perhaps it would be enough, idk...

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Re: Prometheus - NEW compact ECU shield!

Post by puff » Mon Mar 19, 2018 2:56 pm

got it. no sense in not using opamp then..

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Re: Prometheus - NEW compact ECU shield!

Post by Rhinoman » Mon Mar 19, 2018 7:50 pm

andreika wrote:
Mon Mar 19, 2018 10:53 am
When we're measuring the battery voltage, we don't need opamp, because source resistance is low. But we do need it when a high-impedance sensor is connected (including resistive ones like tps and thermistors).
You don't need an op-amp for TPS or thermistors, OEM ECUs don't use them.

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Re: Prometheus - NEW compact ECU shield!

Post by puff » Mon Mar 19, 2018 8:06 pm

probably, they implement software filtering? (Kaman filtering?)

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Re: Prometheus - NEW compact ECU shield!

Post by masrodjie » Wed May 02, 2018 12:22 pm

Nice board! Is there any source for schematic?

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Re: Prometheus - NEW compact ECU shield!

Post by andreika » Wed May 02, 2018 7:04 pm

masrodjie wrote:
Wed May 02, 2018 12:22 pm
Nice board! Is there any source for schematic?
The full schematic is currently available only in PDF format here.

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Re: Prometheus - NEW compact ECU shield!

Post by masrodjie » Sat May 12, 2018 6:08 am

andreika wrote:
Wed May 02, 2018 7:04 pm
masrodjie wrote:
Wed May 02, 2018 12:22 pm
Nice board! Is there any source for schematic?
The full schematic is currently available only in PDF format here.
Is there any EAGLE source?

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Re: Prometheus - NEW compact ECU shield!

Post by andreika » Tue May 15, 2018 5:39 am

masrodjie wrote:
Sat May 12, 2018 6:08 am
Is there any EAGLE source?
No, I'm afraid not, sorry... But I can export it into PCADv16-ASCII format, and you may try to import it in EAGLE if you want.
Don't know if it works though... Anyway, here's the attach:
prometheus-schem-pcad-v16-ascii.zip
Prometheus-schematic-v002-20180130
(161.24 KiB) Downloaded 83 times

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Re: Prometheus - NEW compact ECU shield!

Post by masrodjie » Wed May 16, 2018 11:29 am

andreika wrote:
Tue May 15, 2018 5:39 am
masrodjie wrote:
Sat May 12, 2018 6:08 am
Is there any EAGLE source?
No, I'm afraid not, sorry... But I can export it into PCADv16-ASCII format, and you may try to import it in EAGLE if you want.
Don't know if it works though... Anyway, here's the attach:
prometheus-schem-pcad-v16-ascii.zip
Thank you for your effort for exporting the file. Unfortunately, i am unsuccessful to import from EAGLE. Which software do you use it? Can you share the source file? I want to experiment to modify the board. Is it allowed?

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Re: Prometheus - NEW compact ECU shield!

Post by kneelo » Sun Jun 10, 2018 6:42 am

Would also be very keen to get a hold of the schematic and pcb files for this. Tried to import the pcad schematic into kicad but no luck.

Very nice work by the way...

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Re: Prometheus - NEW compact ECU shield!

Post by Tambralinga » Mon Jun 11, 2018 6:19 pm

very beautiful
Skype : shiva-p
+66 8 5357 5159

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Re: Prometheus - NEW compact ECU shield!

Post by Yaban » Thu Jul 12, 2018 9:44 pm

:shock: That's my dream board. Vvt boost solenoid 4 cylinder sequential ignition sequential..... If need testing let me buy one ;)

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Re: Prometheus - NEW compact ECU shield!

Post by andreika » Mon Oct 15, 2018 2:20 pm

Good news!
Mouser now has STM32F469VGT6 in stock! It's a 1Mb-version of STM32F469VI and it's 100% pin-compatible - I believe it can be used in Prometheus (not tested though)! Currently only the 1st Mb of flash memory is used in rusEFI firmware, so there's not much difference I guess...

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Re: Prometheus - NEW compact ECU shield!

Post by kb1gtt » Mon Oct 15, 2018 10:03 pm

That is some sweet news.
Welcome to the friendlier side of internet crazy :)

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Re: Prometheus - NEW compact ECU shield!

Post by Lyonz » Thu Oct 18, 2018 4:55 pm

It's time to test one 8-)
Je vais devenir fou à monter tout ça
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Re: Prometheus - NEW compact ECU shield!

Post by darxfame » Thu Oct 18, 2018 5:49 pm

Lyonz wrote:
Thu Oct 18, 2018 4:55 pm
It's time to test one 8-)
Je vais devenir fou à monter tout ça
Wow, Cool!

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Re: Prometheus - NEW compact ECU shield!

Post by andreika » Thu Oct 18, 2018 6:37 pm

Lyonz wrote:
Thu Oct 18, 2018 4:55 pm
It's time to test one 8-)
Je vais devenir fou à monter tout ça
Magnifique! :o
Congrats on your first rev.02 Prometheus board! If you need any help or info on pcb assembly - just let me know.
Btw we have some helpful photos showing different stages of assembly...

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Re: Prometheus - NEW compact ECU shield!

Post by Lyonz » Fri Oct 19, 2018 1:39 am

No problem.
It's very kind of your encouragement Darxfame & Andreika.
I have been thinking about making a model for a long time.
I received PCBs a few days ago (impossible to have less than 10 lol) and the finish is TOP.
I received the first components, and I'm waiting for the rest including the STM32F469VGT6, I need to see the operation, the speed at startup of the card and the features (+ SPI).
At the moment, I have trouble finding the VND5N07-E, the ESD5Z5.0T1G diode, the BIP373 transistors, the 1.02K and 2K 0805 resistors.

I also ask myself big questions when I see how the card is small and the tiny components lol, I'm going to have fun.

But I'll take pictures as I go on, But I'm interested in all the information and photos during the manufacturing process

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Re: Prometheus - NEW compact ECU shield!

Post by andreika » Fri Oct 19, 2018 8:15 am

Lyonz wrote:
Fri Oct 19, 2018 1:39 am
I have trouble finding the VND5N07-E,
You may try VND14NV04 instead. Perhaps they're more expensive but better. Darxfame did exactly the same.
Lyonz wrote:
Fri Oct 19, 2018 1:39 am
the ESD5Z5.0T1G diode,
This TVS-diode is recommended but not required, it just increases the stability of MAX9926 (absorbs overvoltage peaks from trigger inputs)..
Lyonz wrote:
Fri Oct 19, 2018 1:39 am
the BIP373 transistors
Yes, those are available mostly from China markets (aliexpress.com etc.)... :( But there're also several alternatives like BU941ZT or IRGB14C40L. Though I don't know if they are really good enough... Or maybe just google for "Ignition transistor TO-220" for more?..
Lyonz wrote:
Fri Oct 19, 2018 1:39 am
the 1.02K
You don't need R70 and R68 if you're using a fixed-voltage regulator like MIC4576-5.0. See "Remark" notes in the BOM list!
Lyonz wrote:
Fri Oct 19, 2018 1:39 am
2K 0805 resistors.
If it's R127, then perhaps you may try to put 2.2k there, but then you'll have to adjust vbattDividerCoeff parameter...

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Re: Prometheus - NEW compact ECU shield!

Post by kb1gtt » Fri Oct 19, 2018 10:03 am

It sounds like you have a good plan to install the components. I do not know that plan, so forgive me if my suggestions are different. Here are some suggestions which might be of help.

-- If soldering by hand instead of in an oven, install the component with large heat slugs first. You have to apply lots of heat to heat up the copper floods. When you do, you can cause surrounding chips solder to melt. If that happens it is easy to accidentally knock off chips that you do not intend to knock off.
-- Install the power supply first, then validate it's generating the proper voltage. If you have some kind of problem, it is handy that you only have to look at these components while diagnosing assembly issues. By doing the power supply first, if it fails and generates more than 5V, it will not cause damage to other components, as those components have not been installed.
-- Install MCU components next, as well as a circuit which has an LED which can blink. There are many tight leads with this chip, which has a higher chance of failure than other circuits. If something happens with this chip, it could cause you to scrap the board. Scrapping a mostly empty board is beneficial. By installing a circuit with a blink-able LED you can verify that the MCU has been properly installed.
-- Install the MAX992# circuit next. Again tight leads could potentially cause problems.
-- Install remaining circuits one circuit at a time, such that if you need to track something down, you have isolated components to diagnose.

You know your assembly skills and assembly constraints better than I. Those are some suggestions, and good luck with soldering it up.
Welcome to the friendlier side of internet crazy :)

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Re: Prometheus - NEW compact ECU shield!

Post by andreika » Fri Oct 19, 2018 1:34 pm

Here's the 1st section of PCB assembly manual (draft version):

https://rusefi.com/wiki/index.php?title ... pply_block

Any feedback/comments/suggestions are welcomed!

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Re: Prometheus - NEW compact ECU shield!

Post by atntpt » Sun Oct 28, 2018 12:43 pm

Hi, how could we connect normal smart coils to this board?

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Re: Prometheus - NEW compact ECU shield!

Post by Abricos » Sun Oct 28, 2018 1:13 pm

atntpt wrote:
Sun Oct 28, 2018 12:43 pm
Hi, how could we connect normal smart coils to this board?
What you mean smart coils ???
This one ?
AEM 30-2853 High Output IGBT Inductive Smart Ignition Coil

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Re: Prometheus - NEW compact ECU shield!

Post by atntpt » Sun Oct 28, 2018 1:16 pm

Ingnition coils that work with 12v or 5v signal and don't require those big BIP .. like VAG coils or Toyota coils on plug

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Re: Prometheus - NEW compact ECU shield!

Post by Abricos » Sun Oct 28, 2018 1:28 pm

I think if you post correct models of coil it will be more better ...

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Re: Prometheus - NEW compact ECU shield!

Post by atntpt » Sun Oct 28, 2018 1:33 pm

Abricos wrote:
Sun Oct 28, 2018 1:28 pm
I think if you post correct models of coil it will be more better ...
06E905115F are r8 coils for example

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Re: Prometheus - NEW compact ECU shield!

Post by Abricos » Sun Oct 28, 2018 1:35 pm

I think it supports 4x individual ignition coil ...
Do you looked at the first page of the specification ...

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Re: Prometheus - NEW compact ECU shield!

Post by atntpt » Sun Oct 28, 2018 2:53 pm

Abricos wrote:
Sun Oct 28, 2018 1:35 pm
I think it supports 4x individual ignition coil ...
Do you looked at the first page of the specification ...
I know it does, maybe I'm not making myself clear, there are to main kinds of coils , those who need a big igbt and others that have an internal ingtor. This board looks like is designed for coils that don't have that internal ignitor. Frankenso in other is.

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Re: Prometheus - NEW compact ECU shield!

Post by andreika » Sun Oct 28, 2018 4:53 pm

atntpt wrote:
Sun Oct 28, 2018 12:43 pm
Hi, how could we connect normal smart coils to this board?
Try something like this:
!logic-coils-jumpers.jpg
!logic-coils-jumpers.jpg (137.15 KiB) Viewed 2460 times
And don't forget to specify pin inversion mode.

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Re: Prometheus - NEW compact ECU shield!

Post by atntpt » Mon Oct 29, 2018 12:15 pm

Thanks ! Maybe i could replace with a non inverting buffer ? Is the pcbs file available somewhere ? A suggestion would be have the option to popolete the BIP part or an alternative with 2 4427 since some coils need some more courent than the buffer can supply .

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