Search found 137 matches

by mobyfab
Sun Jun 03, 2018 10:46 pm
Forum: Software
Topic: Bi-fue / dual fuel capability?
Replies: 34
Views: 2345

Re: Bi-fue / dual fuel capability?

You don't even need a single table in memory, just the current computed output values :)
by mobyfab
Thu Mar 29, 2018 10:32 am
Forum: Software
Topic: Dual wideband?
Replies: 12
Views: 1346

Re: Dual wideband?

russian wrote:
Wed Mar 28, 2018 11:47 am
V8Volvo245 wrote:
Wed Mar 28, 2018 7:17 am
Does it not run in closed loop normally? :o
Well, you are right - there is closed loop. I am just not aware of anyone using it :) So yes, ECU uses one o2 sensor for closed loop. No idea how to use two o2 sensors, any proposals?
Just bind each sensor to a set of cylinders for fuel offsets.
by mobyfab
Wed Mar 21, 2018 4:45 pm
Forum: Hardware
Topic: rusEfi own wide band controller board add-on using CJ125
Replies: 301
Views: 25824

Re: CJ125 board

Found some detailed documentation for the sensor: https://www.ecotrons.com/files/Bosch_LS ... h_Info.pdf
by mobyfab
Tue Mar 20, 2018 12:38 pm
Forum: Misc
Topic: who wants to port to Power Architecture?
Replies: 64
Views: 20968

Re: who wants to port to Power Architecture?

GTM doc http://www.st.com/content/ccc/resource/technical/document/reference_manual/group0/a7/9e/ba/61/bf/4e/4c/36/DM00091883/files/DM00091883.pdf/jcr:content/translations/en.DM00091883.pdf Seems like it's another closed technology with paid tools: https://www.tasking.com/products/gtm https://www.tas...
by mobyfab
Tue Mar 20, 2018 11:34 am
Forum: Hardware
Topic: rusEFI display
Replies: 54
Views: 6885

Re: rusEFI display

I've had this kind of project in mind for a few years now... had even made a pcb using a beaglebone, but never finished it. The idea was to create a base board for an existing cpu board (now it would be a cheap SODIMM A20 SOM) to drive the LCD and an STM32 to handle the IO. You can even add fancy ba...
by mobyfab
Wed Nov 15, 2017 11:22 am
Forum: Hardware
Topic: cheap cylinder pressure sensor option?
Replies: 42
Views: 6469

Re: cheap cylinder pressure sensor option?

http://bmwmotorcycletech.info/ionizatio ... bystem.pdf

Not sur how one could retrofit these.
by mobyfab
Sat Nov 04, 2017 3:22 pm
Forum: Software
Topic: Firmware developent status
Replies: 409
Views: 69730

Re: Firmware developent status

Congrats!!
by mobyfab
Mon Oct 16, 2017 1:26 pm
Forum: Hello World
Topic: rusEfi map: who is where?
Replies: 54
Views: 9144

Re: rusEfi map: who is where?

Versailles, 78000, France
by mobyfab
Wed Jun 28, 2017 2:54 pm
Forum: Hardware
Topic: Injection timing using FPGA for Common Rail Diesel
Replies: 9
Views: 1225

Re: Injection timing using FPGA for Common Rail Diesel

Another good reason to use hardware timers for signals, as I advised :) Right now the signals are triggered via software from a timer interrupt, which is not as precise. (but you get more outputs and flexibility) You can do that with a general purpose MCU, 1us resolution is easy to achieve with a 32...
by mobyfab
Wed Jun 28, 2017 1:10 am
Forum: Software
Topic: Firmware developent status
Replies: 409
Views: 69730

Re: Firmware developent status

For first step my idea is two use the user button to switch between USB port modes: normal mode serial USB, is reset while holding button it would be mass storage instead. Theoretically a composite device could be possible but that's above my current USB skills. I can try implementing composite dev...
by mobyfab
Sun Jun 11, 2017 2:38 pm
Forum: Hardware
Topic: Power supply - kb1gtt
Replies: 212
Views: 38188

Re: Power supply - kb1gtt

These are starting to appear on aliexpress: 1.5Mhz, synchronous, small, very cheap :) https://www.aliexpress.com/item/Smart-Electronics-XD-45-Mini-360-Model-Aircraft-DC-DC-Step-Down-Power-Supply-Module-Better/32482324438.html Datasheet http://www.haoyuelectronics.com/Attachment/MP1584/MP1584.pdf I o...
by mobyfab
Thu May 11, 2017 1:06 pm
Forum: Misc
Topic: Motolink, my fuel mapper project for motorcycles
Replies: 6
Views: 1250

Re: Motolink, my fuel mapper project for motorcycles

Yes, using vanilla 16.1.x and contrib repo.

I'm doing everything in C so I probably won't re-use any rusefi code.
by mobyfab
Wed May 10, 2017 7:05 pm
Forum: Misc
Topic: Motolink, my fuel mapper project for motorcycles
Replies: 6
Views: 1250

Re: Motolink, my fuel mapper project for motorcycles

I won't use any ASICs in this project, so no, it will be 100% discrete and directly measured by the MCU just like knock.
by mobyfab
Wed May 10, 2017 4:33 pm
Forum: Misc
Topic: Motolink, my fuel mapper project for motorcycles
Replies: 6
Views: 1250

Re: Motolink, my fuel mapper project for motorcycles

Yes it's simply connected to a buffer opamp with a dc blocking cap and biasing at 1/2 VDDA.
I have a dedicated ADC for this.

There's a graph on my app that shows the FFT result.
ARM provides a DSP library, it's not too complicated to use.
by mobyfab
Wed May 10, 2017 2:00 pm
Forum: Misc
Topic: Motolink, my fuel mapper project for motorcycles
Replies: 6
Views: 1250

Motolink, my fuel mapper project for motorcycles

I'm working on this for some time now... had not touched it for almost 2 years, but I finally finished(ish) it! Motolink is a fuel mapper, which is a device that will read values from various sensors (rpm, tps, afr) to create 2D maps containing measurements. Why would I need this? Is it like power c...
by mobyfab
Wed May 10, 2017 12:55 pm
Forum: Misc
Topic: Is stm32f4 the right chip?
Replies: 91
Views: 14660

Re: Is stm32f4 the right chip?

I really don't see the point of starting over with lack of drivers, community support, documentation etc just because it's 5v and "Automotive qualified".

If it had some kind of timing co-processor (or dual core) why not, but it's just another general purpose MCU.
by mobyfab
Thu May 04, 2017 12:46 pm
Forum: Software
Topic: How to compile the firmware
Replies: 83
Views: 26960

Re: How to compile the firmware

Check your PATH, restart windows if you just installed GCC.
by mobyfab
Wed May 03, 2017 5:03 pm
Forum: Software
Topic: ISO 9141-2 Diagnostics
Replies: 18
Views: 2741

Re: ISO 9141-2 Diagnostics

No, CAN PIDs are standardized, just like K-line, KWP2000, etc etc.
Both can have custom PIDs but the message format is the same.
by mobyfab
Tue Apr 25, 2017 3:04 pm
Forum: Hardware
Topic: track telemetry - data radio
Replies: 73
Views: 8133

Re: track telemetry - data radio

That should work just fine, as long as you have the 1 Watt - 900 Mhz version.
by mobyfab
Tue Apr 25, 2017 2:19 pm
Forum: Software
Topic: ISO 9141-2 Diagnostics
Replies: 18
Views: 2741

Re: ISO 9141-2 Diagnostics

What's the point of implementing ISO9141-2 when we have CAN bus?
by mobyfab
Tue Apr 25, 2017 10:28 am
Forum: Hardware
Topic: track telemetry - data radio
Replies: 73
Views: 8133

Re: track telemetry - data radio

I understand these LORA modules are reasonably good for this kind of thing. https://octopart.com/rf-lora-868-so-rf+solutions-66465173 http://www.newark.com/rf-solutions/gamma-868-so/lora-transceiver-868mhz-9-6kbps/dp/68Y7682?mckv=k4M2bM8I&gross_price=true&CATCI=pla-289295517529&CAAGID=20389674261&C...
by mobyfab
Mon Apr 24, 2017 6:16 pm
Forum: Hardware
Topic: track telemetry - data radio
Replies: 73
Views: 8133

Re: track telemetry - data radio

https://www.rcgroups.com/forums/showthread.php?2037442-Ultimate-LRS-40-km-APM-Telemetry-RC-link-for-54-(using-2-OrangeRX-1W-TX) Basically we could mod this to send any kind of serial data we want, over long distances, full duplex :) If you want to use the transceivers directly: http://www.hoperf.com...
by mobyfab
Mon Apr 24, 2017 3:07 pm
Forum: Hardware
Topic: track telemetry - data radio
Replies: 73
Views: 8133

Re: track telemetry - data radio

Have a look at this: http://openlrsng.org
There are a ton of videos about it as well.

Some people make it work to 100Km+ with the right antennas, so around a track it should work just fine if the base station is in the middle. ;)
by mobyfab
Mon Apr 24, 2017 9:34 am
Forum: Hardware
Topic: stm32 LQFP48
Replies: 21
Views: 7462

Re: stm32 LQFP48

You can't use USB and CAN at the same time on the F1.

Stay away from it, it's full of silicon bugs.

If you want to do a USB-CAN bridge, go for a F072 lqfp32.
by mobyfab
Sat Apr 22, 2017 1:17 am
Forum: Hardware
Topic: analog inputs: op-amp + divider - Russian - now MCP6004
Replies: 126
Views: 35652

Re: analog inputs: op-amp + divider - Russian - now MCP6004

The ADC is always 1K/8pF as far as I know. So increasing resistor values might help here. ;) Edit: it's up to 6k, at 1.8V. Gets lower as VDD increases. Sampling cap is 4pF for F405 devices. It does not change with frequency. (maybe you are referring to "Rain" which is the max source impedance for a ...
by mobyfab
Fri Apr 21, 2017 3:17 pm
Forum: Hardware
Topic: Power supply - kb1gtt
Replies: 212
Views: 38188

Re: Power supply - kb1gtt

You can also change to a modern regulator that uses a higher frequency.
ie: http://www.ti.com/lit/ds/symlink/lm22670.pdf

Full range of replacements here:
http://www.ti.com/ww/en/simple_switcher/regulators.html
by mobyfab
Fri Apr 21, 2017 1:23 pm
Forum: Hardware
Topic: Power supply - kb1gtt
Replies: 212
Views: 38188

Re: Power supply - kb1gtt

No sure if this is the right place but... Have we checked if using a separate LDO for analog is actually better than trying to filter VDD? I'm pretty sure you can reduce noise using a cheap low noise SOT23 LDO. This is what I did, went from ~30mV to ~2mV ripple on ADC values using a LDK120DM33R. One...
by mobyfab
Fri Apr 21, 2017 11:31 am
Forum: Hardware
Topic: analog inputs: op-amp + divider - Russian - now MCP6004
Replies: 126
Views: 35652

Re: analog inputs: op-amp + divider - Russian - now MCP6004

By output I meant the opamp's which is connected to the ADC input.
by mobyfab
Thu Apr 20, 2017 12:39 pm
Forum: Hardware
Topic: analog inputs: op-amp + divider - Russian - now MCP6004
Replies: 126
Views: 35652

Re: analog inputs: op-amp + divider - Russian - now MCP6004

https://s3.postimg.org/uplrfdsu7/opamp1.png I'm not sure about which resistors you are using on output (if you are using any) but this might help. Currently I have a 400mV headroom on my sensors output, using a 1/2k bridge (5v->3.33v) Since the sampling is at only 1kHz I will try to increase those ...
by mobyfab
Sat Apr 15, 2017 1:10 am
Forum: Hardware
Topic: Prometheus - NEW compact ECU shield!
Replies: 158
Views: 29923

Re: Prometheus - NEW compact ECU shield!

Haha one day us metric folks will conquer the world! (There's only USA left anyway :D ) I was talking about the inside of the ECU since you have to drive the primary directly there, all pencil coils are potted anyway indeed. I remember seeing the CBR coils spiking going up around 120v on the primary...