Search found 17 matches

by infinityedge
Sun May 03, 2020 8:57 pm
Forum: Hardware
Topic: rusEfi own wide band controller board add-on using CJ125
Replies: 352
Views: 81645

Re: rusEfi own wide band controller board add-on using CJ125

Why can't all that be done with existing rusEFI software and hardware? Let me answer this universal question with a universal answer, in two parts. See https://github.com/rusefi/rusefi/wiki/I_have_an_idea Would the CJ125 hardware and software interface to rusEFI take less human resources to complet...
by infinityedge
Sun May 03, 2020 6:57 pm
Forum: Hardware
Topic: rusEfi own wide band controller board add-on using CJ125
Replies: 352
Views: 81645

Re: rusEfi own wide band controller board add-on using CJ125

I think things are not promising for rusEFI CJ125 unless we known some OEM ECU as a source for used parts? Is a CJ125 just excessive complexity? 14point7's open source wideband controller just has two PID controllers (actually PI controllers), one for the heater and one for Ia with the heater PWM c...
by infinityedge
Wed Mar 11, 2020 10:41 pm
Forum: Hardware
Topic: EFI for small engines
Replies: 100
Views: 23777

Re: EFI for small engines

Ural motorcycles used a similar idea for a few years that was made by Electro Jet:

http://www.electrojet.com/products/

And Walbro seems to also be doing something similar:

http://www.walbro.com/wp-content/uploads/2015/12/Walbro_EEM_Injection_Mower_PS_EN.pdf
by infinityedge
Sat Jan 11, 2020 3:15 am
Forum: Misc
Topic: FPGA in ECU
Replies: 43
Views: 20398

Re: FPGA in ECU

As a theoretical fan of an FPGA coprocessor for an EFI board, here is an off the cuff assessment of what is needed at the bare minimum: SPI connection to the main MCU with the MCU handling the slow sensors and closed loop or table selection and the FPGA handling the time critical parts. There should...
by infinityedge
Thu Jan 09, 2020 7:27 pm
Forum: Misc
Topic: Is stm32f4 the right chip?
Replies: 137
Views: 50872

Re: Is stm32f4 the right chip?

If we're going to go after "ultra scheduling precision", By the way, this comment is not a recommendation that we do something different. There are still significant improvements to be made within the existing "fully software scheduled" world. Yeah, my iCE40 diversion isn't a full endorsement of th...
by infinityedge
Thu Jan 09, 2020 7:25 pm
Forum: Misc
Topic: Is stm32f4 the right chip?
Replies: 137
Views: 50872

Re: Is stm32f4 the right chip?

You don't even need to measure the timing performance of an FPGA with real hardware. You can accurately simulate the whole thing beforehand, and something designed properly will be able to have hard timing guarantees about when edges will arrive. The prototype I wrote a few years ago was accurate t...
by infinityedge
Thu Jan 09, 2020 5:55 pm
Forum: Misc
Topic: Is stm32f4 the right chip?
Replies: 137
Views: 50872

Re: Is stm32f4 the right chip?

Infinityedge can you recommend a dev board for this fpga platform? Can you implement a hello world LED blinking controlled via SPI? iCE40 dev boards: https://www.crowdsupply.com/tinyfpga/tinyfpga-bx https://www.olimex.com/Products/FPGA/iCE40/iCE40HX1K-EVB/open-source-hardware https://www.crowdsuppl...
by infinityedge
Thu Jan 09, 2020 5:07 pm
Forum: Misc
Topic: Is stm32f4 the right chip?
Replies: 137
Views: 50872

Re: Is stm32f4 the right chip?

lets not discuss fpga here. please find existing topic or create a new one. The FPGA stuff was already broached a while back. Isn't this thread about changing hardware architectures from STM32F4 in order to get a more accurate timing response? An alternative to finding a faster chip with more timer...
by infinityedge
Thu Jan 09, 2020 3:28 am
Forum: Misc
Topic: Is stm32f4 the right chip?
Replies: 137
Views: 50872

Re: Is stm32f4 the right chip?

If anyone is interested in adding an FPGA co-processor, might I suggest the iCE40 line from LatticeSemi: http://www.latticesemi.com/en/Products/FPGAandCPLD/iCE40 They aren't huge as far as FPGAs go but do have up to 7680 logic cells. The main benefit is that they are one of the few FPGAs with a full...
by infinityedge
Wed Jan 08, 2020 2:44 pm
Forum: Hardware
Topic: rusEfi own wide band controller board add-on using CJ125
Replies: 352
Views: 81645

Re: rusEfi own wide band controller board add-on using CJ125

JRD McLAREN wrote:
Wed Jan 08, 2020 7:53 am
I have no problem with this...
..
but ,, in my opinion...
board need to be redesigned...
..

heater led..
bigger pads for sensor wires
2 layer board
.......
Might also want to switch out the VNS14NV04 power driver for a non-obsolete part as well.
by infinityedge
Mon Dec 30, 2019 5:27 am
Forum: Hardware
Topic: EFI for small engines
Replies: 100
Views: 23777

Re: EFI for small engines

kb1gtt wrote:
Mon Dec 30, 2019 4:24 am
What is a ball park price for a 100mm square alum substrate board?
Around $40-50US for a 10-pack of 100mm by 100mm boards.

(Single sided of course, multisided alum boards are a PITA to do vias for so the price skyrockets)
by infinityedge
Mon Dec 30, 2019 4:09 am
Forum: Hardware
Topic: EFI for small engines
Replies: 100
Views: 23777

Re: EFI for small engines

Yes you can pay for many things. Most people look to design for low cost china MFG and assembly. Those will generally be lower temperature PCB's. dirtypcbs, pcbcart, and seeedstudio will all do small batch Al boards at a reasonable price and I've seen a few chinese pcb shops with high temp fr4 for ...
by infinityedge
Sun Dec 29, 2019 5:28 pm
Forum: Hardware
Topic: rusEfi own wide band controller board add-on using CJ125
Replies: 352
Views: 81645

Re: rusEfi own wide band controller board add-on using CJ125

russian wrote:
Fri Dec 27, 2019 10:40 pm
infinityedge wrote:
Fri Dec 27, 2019 5:08 pm
Where is the firmware code for the wideband control stashed?
https://github.com/rusefi/rusefi/tree/master/firmware/hw_layer/sensors
Thank you!
by infinityedge
Sun Dec 29, 2019 5:26 pm
Forum: Hardware
Topic: EFI for small engines
Replies: 100
Views: 23777

Re: EFI for small engines

kb1gtt wrote:
Sat Dec 28, 2019 11:13 am
The fr4 PCB material is typically the limiting factor. The stm has low enough thermal resistance that the fr4 gets to hot before the stm gets to hot.
They have higher temp rated fr4, or you can go crazy and do a single sided, all-SMD design on aluminum backing.
by infinityedge
Fri Dec 27, 2019 5:08 pm
Forum: Hardware
Topic: rusEfi own wide band controller board add-on using CJ125
Replies: 352
Views: 81645

Re: rusEfi own wide band controller board add-on using CJ125

russian wrote:
Sun Jul 03, 2016 1:43 pm
Our little board for Bosch CJ125

https://github.com/rusefi/rusefi/tree/master/hardware/CJ125_board

ibom available at https://rusefi.com/docs/ibom/
Where is the firmware code for the wideband control stashed?
by infinityedge
Fri Dec 27, 2019 5:07 pm
Forum: Hardware
Topic: Ion Sense
Replies: 153
Views: 37511

Re: Ion Sense

You can pick up these ion sense coils from Harley for about $40 or OEM for about $65 Mine is marked Delphi 28058097 with a serial number of aE141028 48 http://www.ebay.com/itm/Harley-Davidson-Ignition-Coil-28058097-/351540572325?hash=item51d97370a5:g:~PgAAOSwuWVWEt1f&vxp=mtr I toasted mine in part ...
by infinityedge
Fri Dec 27, 2019 4:50 pm
Forum: Hardware
Topic: EFI for small engines
Replies: 100
Views: 23777

Re: EFI for small engines

One cylinder system chip tle8080 https://www.infineon.com/cms/en/product/automotive-system-ic/engine-management-ic/tle8080-3em/ Also see https://www.infineon.com/cms/en/applications/automotive/powertrain/small-engine-starter-kit/ I have no idea how to make a PCB survive vibration, I am a software d...