Re: Frankenso - ECU shield compatible with OEM case
Posted: Sat Jun 17, 2017 5:47 am
by mzk
Attached is the screenshot.
Re: Frankenso - ECU shield compatible with OEM case
Posted: Sat Jun 17, 2017 10:06 am
by kb1gtt
Hmmm, that has been like that for all of R0.4 and perhaps earlier. Did your MFG cut this trace? So far we have not had a problem with this trace.
I have added this to the known_issues.txt such that it can be addressed on future spins.
Re: Frankenso - ECU shield compatible with OEM case
Posted: Sun Jun 18, 2017 1:27 pm
by mzk
I moved the right cut line with 0.25 mm. The manufacturer didn't want to make the board with spacing less than 0.25mm to the edge. Maybe it isn't a problem at all.
Re: Frankenso - ECU shield compatible with OEM case
does it matter what amp the 68uh inductor need to be? I can only seem to find 750ma on ebay in 8x10?
Re: Frankenso - ECU shield compatible with OEM case
Posted: Fri Jul 14, 2017 4:52 pm
by kb1gtt
Yes, the amp ratings matter. I suggest the one in the BOM. I once changed between a square one and circle one with the same amp ratings, and there were changes. However at the end of the day, it functioned. One consumed more watts which showed up as a hotter temperature in the inductor. However it worked, so it could have been used, but it would not have been as robust about higher ambient temperatures. I have found that even small changes to this inductor can result in significant differences. I would suggest you try to get it working with the parts of the BOM best you can, then start making changes. Such that you have a better base line for what is normal, then you can see if you can make it better some how. AKA lower cost or better availability of parts is certainly better and an item we are interested in. However I suggest you get a good starting point, then try to make it better.
Re: Frankenso - ECU shield compatible with OEM case
Posted: Fri Jul 14, 2017 8:47 pm
by jabran
Ok cool just asking as the wiki says to get the 68uh radial ones .
The bom brings up a axial one on digikey is that correct? That's the last part I need to place my order
Re: Frankenso - ECU shield compatible with OEM case
Posted: Fri Jul 14, 2017 10:07 pm
by kb1gtt
I would say the BOM is the best option, I'm not sure about the wiki. I haven't reviewed the wiki. There is a good chance the one on the wiki is OK, but might make a bit more heat. At the end of they day, we are not running the full current, so the extra heat may be minimal.
Re: Frankenso - ECU shield compatible with OEM case
Posted: Mon Jul 31, 2017 2:07 am
by AndreyB
Power supply on 0.5 works!
These loose single-side fuse clips could be a challenge for our Chinese friends. Too bad KS 3557-2 with plastic case for the clips is the wrong size
Re: Frankenso - ECU shield compatible with OEM case
Posted: Mon Jul 31, 2017 9:38 am
by kb1gtt
I recall it was a pain to find cost effective, mini fuse holders. It seems the universal ones were more readily available and lower cost. The KeyStone 3557 costs about $0.40 while the single self contained fuse holders are typically $1.00 and above. To me this seems like crazy pricing, when I compare it to other components we get for under $1.
Re: Frankenso - ECU shield compatible with OEM case
Posted: Mon Jul 31, 2017 12:18 pm
by AndreyB
usability question: D12-D23 symbol is asking for a Schottky while I am using a (standard?) 1n4007. Can we clarify that schottky is not a requirment right on the schematics?
Re: Frankenso - ECU shield compatible with OEM case
Posted: Mon Jul 31, 2017 3:33 pm
by stefanst
I am currently setting up a frankenso 0.4 board for a '99 Miata. For this car the idle valve is connected to 3M/W51. This is not a low-side driver as needed, so I patched it to W35/Low04.
The problem with that is that there is no provision for a flyback diode on the board for W51.
This could be helped by having the flyback connect at the driver side and not the connector side of the jumper in future revisions.
Re: Frankenso - ECU shield compatible with OEM case
Posted: Mon Jul 31, 2017 6:15 pm
by kb1gtt
How un-practical is it to move the harness connector socket? This connector allows the pin sockets to be moved to different position in the shell fairly easily. Do you have a need to maintain the OEM ECU pin out? It might be easier and cleaner if you move your wire connected to the W51 to your W35 location on the connector, then you would have the optional diode.
About 1N40XX diodes use, would depend on the application. We can change the note, removing schottky. However you may want schottky for it's beefed up strength. I understand they can typically handle more inrush current, as well TVS diodes have small capacitance which makes the reasonably fast for surge suppression issues, etc. Basically diodes have different physical properties, and you should match the diode to the application. I'm not sure how well a 1N400XX would work, it might work well, or it might fail after some time. As well a schottky might not react fast enough which might cause voltage spikes. So removing schottky from the description makes sense, but we should also keep in mind you should select a proper diode, or you may have issues.
Re: Frankenso - ECU shield compatible with OEM case
Posted: Mon Jul 31, 2017 7:04 pm
by stefanst
kb1gtt wrote:How un-practical is it to move the harness connector socket? This connector allows the pin sockets to be moved to different position in the shell fairly easily. Do you have a need to maintain the OEM ECU pin out? It might be easier and cleaner if you move your wire connected to the W51 to your W35 location on the connector, then you would have the optional diode.
Re-doing the harness would be quite impractical in this case- I need to be able to still use the stock ECU. I would have to make an adapter-harness for that purpose then. So for this particular board, I will solder in a "flying" diode as a workaround.
The intention for having the patch-area is to be able to patch to different connector configurations. This will, in some cases, sever the connection from diode to driver. Is there any reason to keep them as-is in future revisions?
Re: Frankenso - ECU shield compatible with OEM case
Posted: Tue Aug 01, 2017 9:52 am
by kb1gtt
Putting the diode connection on the other side of the W jumpers would be quite difficult on the top or bottom layers. The injector traces are quite fat and I have them on both top and bottom layers. A quick look shows that I can probably get the diode traces on the power layer. So at least in a quick looks I think it's possible. I think there is no reasons why the layout cannot be changed to have the diodes on the other sides of the W jumpers.
I just added the below to knownissues.txt, and thanks for the feedback. Keep it coming.
150) Diodes like D16 to D23 would be better if they were connected to the other side of the W## connections.
Injector drivers
Posted: Wed Oct 25, 2017 12:19 pm
by Rhinoman
I'm still working away from home so I can't check this. I'm looking through the frankenso v0.42 schematic again and I can see that the injector drivers are driven by signal named inj_xx_5V. It appears that the signal comes directly from the processor which is 3.3V is it not?
Re: Frankenso - ECU shield compatible with OEM case
Posted: Wed Nov 08, 2017 11:24 pm
by AndreyB
I am working on 0.5 assembly order and I've noticed a minor BOM issue:
I believe these should be #1) same part number #2) not obsolete part number
SQ2301ES-T1-GE3?
Re: Frankenso - ECU shield compatible with OEM case
Posted: Thu Nov 09, 2017 4:54 am
by kb1gtt
A quick look at the datasheet's seems to indicate you are correct. The Si2323DS is more available, it's not AEQ qualified, but seems to have specifications that are the same or better than the obsolete chip. I'll have to look at it closer perhaps around Monday or Tuesday. Right now I can't look at the schematic, but I'll be able to do that in a couple days.
Re: Frankenso - ECU shield compatible with OEM case
Posted: Thu Nov 09, 2017 5:39 am
by AndreyB
150) Q701 and Q1001 should use same not obsolete chip
Re: Frankenso - ECU shield compatible with OEM case
Posted: Fri Dec 01, 2017 3:23 am
by AndreyB
End of an era. Frankenso kit at the store is now version 0.5!
Re: Frankenso - ECU shield compatible with OEM case
Posted: Wed Dec 06, 2017 5:25 am
by AndreyB
152) R170 unify part number with R102/R103/R104
153) unify 0805 LED packages in order to simplify BOM - no need to have any LED-0805_A like D2 while D1005 is LED-0805
Re: Frankenso - ECU shield compatible with OEM case
Posted: Thu Dec 07, 2017 1:20 am
by AndreyB
More BOM cleanup dreams
157) Special field/flag for native stm34-related components to simplify BOM if using external brain board
158) add "virtual" or DNP note to all non-PCB headers like P31 P32 P48 P53 P49 P50 P55 P56 P57 P58
159) unify DNP labels for all real but DNP components
160) unify part number and value for most test points like P15 P24 P25 P10 P1002 W63 W64 P1502 etc
Re: Frankenso - ECU shield compatible with OEM case / offici
Posted: Thu Jan 11, 2018 7:46 pm
by AndreyB
New assembled boards have arrived!
165) remove test_module1501 to reduce confusion
Re: Frankenso - ECU shield compatible with OEM case / offici
Re: Frankenso - ECU shield compatible with OEM case / offici
Posted: Sun Jan 14, 2018 4:38 pm
by kb1gtt
Yipee! More power to you. Good to hear it was an easy fix. Sorry to hear the other messed up items. I guess that happens on the first build.
Also you should make one which is as you want it from the MFG, then take high resolution pictures both front and back. That can be really useful to them if they have any questions about what should and what should not be installed.
Re: Frankenso - ECU shield compatible with OEM case / official
168) now that all mounting holes align let's move back side traces away from top-right and bottom-right mounting points. See https://rusefi.com/forum/viewtopic.php?f=4&t=569&p=28199#p28199
Re: Frankenso - ECU shield compatible with OEM case / official
Re: Frankenso - ECU shield compatible with OEM case / official
Posted: Fri Mar 09, 2018 2:23 am
by AndreyB
Just synched a bunch of files - I've compressed some files inside 3D folder (I know KiCad would not be happy - but I have compaints about repo size being too large)
What is the end goal - would we have nice .png files of the board like it's assembled? Or something else?
Re: Frankenso - ECU shield compatible with OEM case / official
Posted: Fri Mar 09, 2018 10:11 am
by kb1gtt
The primary end feature is that the 3D printing people will now have a 3D model they can use when designing there 3D printed enclosures and such. Well that and because it's cool to have a 3D model.
