[info] Frankenso - ECU shield compatible with OEM case / official

Hardware inside and outside of the ECU
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Re: Frankenso - ECU shield compatible with OEM case / official

Post by snua12 » Tue Aug 13, 2019 1:19 am

snua12 wrote:
Mon Aug 12, 2019 11:11 pm
I'm apologize, Leds are blinking. I've connected throttle body sensor and after few seconds display goes in "two line" mode. Tuner studio is working and throttle position sensor is working in Tuner studio.
Rusefi console is also working.

I understood that problem can be with hardware, dead display or dead gipo on CPU. Or someting in configuration.

Today I'v upload snapshot_20190806_000757_frankenso_na6_rusefi.
Problem was in settings, I've enable lcd display in Tuner Studio Controler-> LCD -> display mode -> hd44780. That was what I'm loogin for.

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Re: Frankenso - ECU shield compatible with OEM case / official

Post by Ahmad » Sat Sep 07, 2019 10:32 pm

Hi
Is it prefer to use SDIO for MMC?
Is it supported with your code?

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Re: Frankenso - ECU shield compatible with OEM case / official

Post by Abricos » Sat Sep 07, 2019 10:46 pm

Ahmad wrote:
Sat Sep 07, 2019 10:32 pm
Hi
Is it prefer to use SDIO for MMC?
Is it supported with your code?
It's supposed SD card ...

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Re: Frankenso - ECU shield compatible with OEM case / official

Post by russian » Sat Sep 07, 2019 10:54 pm

Ahmad wrote:
Sat Sep 07, 2019 10:32 pm
Is it prefer to use SDIO for MMC?
At the moment we only have SPI mode for SD hardware. SDIO mode is not supported in the firmware - see https://github.com/rusefi/rusefi/issues/683
https://rusefi.com/s/howtocontribute
very limited telepathic abilities - please post logs & tunes where appropriate - http://rusefi.com/s/questions
my skype is arro239

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Re: Frankenso - ECU shield compatible with OEM case / official

Post by atntpt » Tue Sep 10, 2019 7:11 pm

Can anyone help me understand why do i have this noise on analog inputs ?
The frequency of the noise seams to sync with some kind of led blink or something
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Re: Frankenso - ECU shield compatible with OEM case / official

Post by mck1117 » Tue Sep 10, 2019 8:06 pm

atntpt wrote:
Tue Sep 10, 2019 7:11 pm
Can anyone help me understand why do i have this noise on analog inputs ?
The frequency of the noise seams to sync with some kind of led blink or something
What does your wiring setup look like? What sensors are those connected to? How are they grounded? How is the ECU grounded?

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Re: Frankenso - ECU shield compatible with OEM case / official

Post by atntpt » Tue Sep 10, 2019 8:57 pm

Testing on bench , I noticed if I power it via discovery usb the 5v line also varies .

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Re: Frankenso - ECU shield compatible with OEM case / official

Post by kb1gtt » Tue Sep 10, 2019 9:22 pm

Which LED did you disconnect to determine it was an LED?
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Re: Frankenso - ECU shield compatible with OEM case / official

Post by atntpt » Wed Sep 11, 2019 6:36 pm

By led I meant a blinking frequency xD

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Re: Frankenso - ECU shield compatible with OEM case / official

Post by mck1117 » Wed Sep 11, 2019 8:00 pm

atntpt wrote:
Tue Sep 10, 2019 8:57 pm
Testing on bench , I noticed if I power it via discovery usb the 5v line also varies .
I understand that you're testing on the bench, but how are the sensors connected? Are sensors connected at all?

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Re: Frankenso - ECU shield compatible with OEM case / official

Post by atntpt » Wed Sep 11, 2019 9:02 pm

I have resistors simulating sensors

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Re: Frankenso - ECU shield compatible with OEM case / official

Post by Old Grey » Mon Sep 23, 2019 10:58 pm

The missing assembly photo
Image
This pic wasn't in this topic, and I was guessing stuff until I found this hard to find photo

I didn't bother making the correct part, but will the centre combination work with the flybacks. The diodes are 2.5mm, and the leg in between is 0.5mm, so the spacing would be 3mm. I put an example trace on the end diode for a SMD part.
Image

Also there's not much room around the screws. I suppose I could use a insulating washer.
Image

What's the INJ current across the 0 ohm resistors. Is it single INJ per mosfet and the STM32 batches them, or can you connect 2 INJ per mosfet. Basically is 0805 ok or do I use 1206.

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Re: Frankenso - ECU shield compatible with OEM case / official

Post by kb1gtt » Mon Sep 23, 2019 11:29 pm

Inj limit is unknown. I expect the limit is based on the mosfet. I think qty 1 mosfet will over heat at around 3 perhaps 4 amps. Each high z injector will conduct about 1 amp. The 0805 is probably fine even up to 5 amps. However the mosfet may over heat and go into shutdown. This is all guess work. So we really don't know.
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Re: Frankenso - ECU shield compatible with OEM case / official

Post by stefanst » Tue Sep 24, 2019 3:00 am

Old Grey wrote:
Mon Sep 23, 2019 10:58 pm
[...]
What's the INJ current across the 0 ohm resistors. Is it single INJ per mosfet and the STM32 batches them, or can you connect 2 INJ per mosfet. Basically is 0805 ok or do I use 1206.
Old Miatas run batch injection with 2 injectors per channel. Several of these are running with 0 problems so far.

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Re: Frankenso - ECU shield compatible with OEM case / official

Post by DonaldBecker » Tue Sep 24, 2019 12:07 pm

Zero ohm resistors are good to at least 1 amp.

Above that you'll need to consult the datasheet for the specific resistor. They will typically specify 2.0 or 2.5 amps (0805) with de-rating for temperature and other conditions. With a 50% design margin you are right back at not much more than 1 amp.

There are specialized zero ohm links that are solid copper with a tin or silver plating. These cost quite a bit more than regular production series resistors with a zero ohm rating, but can be useful in a pinch. A casual search on Digikey brings up a part that is 0.43 qnty 1 in 0805. Hmm, I guess they are targeting designers with a problem that needs to be covered up.

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Re: Frankenso - ECU shield compatible with OEM case / official

Post by kb1gtt » Tue Sep 24, 2019 6:06 pm

If it's a problem, you can also replace the 0805 with a solder snot.
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Re: Frankenso - ECU shield compatible with OEM case / official

Post by Old Grey » Tue Sep 24, 2019 10:01 pm

I was just thinking that the pad is 1.4mm, and a 1206 is 1.5mm, so I thought it would be wise to link them to the 0.070" pins on the Denso connector. If it does 2 High-Z with a single 0805 it's probably not necessary. 8-)

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Re: Frankenso - ECU shield compatible with OEM case / official

Post by puff » Wed Sep 25, 2019 6:03 am

I do remember an smd 0603 fuse rated for 3A (or was it 5A - a green package with letter P on it) used in apple laptops.
when I was looking for a replacement, I thought of using a zero-ohm resistor. Just curious, how bad was such an idea...

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Re: Frankenso - ECU shield compatible with OEM case / official

Post by DonaldBecker » Wed Sep 25, 2019 5:12 pm

puff wrote:
Wed Sep 25, 2019 6:03 am
I do remember an smd 0603 fuse rated for 3A (or was it 5A - a green package with letter P on it) used in apple laptops.
when I was looking for a replacement, I thought of using a zero-ohm resistor. Just curious, how bad was such an idea...
It depends on your goal.

I once repaired several battery management modules for a friend. They were part of an expensive EV BMS, and only were produced for a few months before the small company moved onto a different, less-fragile design. Some of the SMD fuses were burnt, likely from attaching or disconnecting the sense wires to the cells in the wrong sequence. But even one of the fuses burning out rendered the entire multi-$K system unsuitable for use (risking ruining the $10K+ battery pack with no indication of the real problem). No replacements modules were available and no commercial shop would repair them.

In this case a SMD fuse was definitely a mixed blessing. They probably would have been better off with no fuse. Or at least no worse off, since some of the channels had intact fuses -- the most expensive part broke to save the fuse.

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Re: Frankenso - ECU shield compatible with OEM case / official

Post by kb1gtt » Thu Sep 26, 2019 9:41 am

Depends on the goal. If the goal is to light a cigarette it's probably ok. If the goal is to make the Apple product work you want the same fuse.
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