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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 ...

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...

Stock injectors are 190cc at 45psi I think. (all 8 of them, each stage has different spray pattern)

Isn't it more around 100-150V? On coil sticks at least.
Also, can we use proper units?

Maybe he can use slots to increase creapage distance. (like some power supplies)
I don't think commercial ECUs are using any fancy systems for protection other than conformal coating.

Trigger schema:

https://s30.postimg.org/ql3fywvil/cranking_CBR600_RR.jpg
https://s30.postimg.org/vl0w6v159/Triggertable_RC-51.jpg

http://pe-ltd.com/assets/an002_600rr_trigger-sync.pdf

Very cool!

This is a lot more like what I am looking for, you got me interested

Only a few are pin compatible, also the peripherals are different based on the release date. GPIO and ADC went from V1 to V3, I2C V1 was so bugged you could barely, etc. I.e the F1 uses the oldest (some bugged) peripherals but is pin compatible with the F3 which uses recent ones. F0 came after and h...

Yes, so does the STM32.
I was talking about what's between the MCU pin and the connector pin.

I am wondering about that myself, that's why I want to discuss it.

Ultimately it is about a more consistent fuel delivery, a 1us error on a 10ms pulse has far more effect then a 1us error on a 20ms pulse. OEM ECUs are far more complex than an aftermarket and its all aimed at extracting the most exact fuelling, aftermarket ECUs are greatly simplified, there are ver...

A less components to solder, more DACs, 5v ADC, etc.

It's mostly there for reference.

So I though we could talk about programmable mixed signal IO. In other words, ecu pins that can do ADC, DAC, PWM, ICU, digital input or output based on how you decide to program them. A lot of after market ECU have that on a few pins. Here's an IC that does just that: https://www.maximintegrated.com...

With this strategy you have longer injector pulses at low load, any jitter in timing is reduced because its a percentage of the pulse length . At higher loads its less important because economy and emissions are less of an issue. As well as the timing issue as soon as the injector opens the pressur...

I am a bit lost, I don't see how this would make any difference. You still need the same amount of fuel, therefore you need the same pulse width. When the pulse starts does not have anything to do with the quantity of fuel delivered. Also you'd want to avoid multiple pulses because of injector dead ...

I need it for the knock sensor (sampling at 115kHz), but in this case the GBWP is more than sufficient indeed. I agree, we should not care about values near the rails, as the sensors should not go anywhere near that, it should be used to detect open loops. I would not use the same topology for knoc...

The input can go for that range, the issue is the output. That ST chip is much better about actually being a rail to rail chip. Is .2V either rail close enough? See page 6 for VCC = 5V found in aneox's link. Snippet below. ST_LMV324_rail.PNG Using the same opamp on my design, I have the same behavi...

I think it's definitely worth a try.

You can also solder the headers directly on the boards. (from the side of the board, one row on each side, but you need 1.2mm thick PCBs)

andreika wrote:

kb1gtt wrote:there are some op-amps out there that have very small internal rail voltage generating circuits

There's also an option to use an external negative bias circuit like LM7705 - it's not that expensive...

That might actually work.
Especially that you don't need one per channel.

The input can go for that range, the issue is the output. That ST chip is much better about actually being a rail to rail chip. Is .2V either rail close enough? See page 6 for VCC = 5V found in aneox's link. Snippet below. ST_LMV324_rail.PNG Using the same opamp on my design, I have the same behavi...

I still think pin headers would work fine as long as you share the load. If AEM still does it, it must be working fine, they've been doing this for 20+ years. This is the current design for their EMS V2: (found on a supra forum) https://s10.postimg.org/60ej4dv45/IMG_6784_zps0dmmphzg.jpg https://s10....

Maybe we can use PCIe or m2 connectors for signals? (slot the adapter board directly in it) Even an SAS drive connector? http://www.molex.com/molex/products/family?key=serial_attached_scsi_sff_8484&channel=products&chanName=family&pageTitle=Introduction&parentKey=board_to_board_conne...

My pleasure

Often with multilock/molex you have different part numbers for the same connector based on random things like plating so there might be 3-4 compatible references for that one.

Also in this case the pictures are from a civic and a lancer evo, not a subaru. (yellow connector)

It's probably simpler to use a LIN Bus

Very good idea for the slack team, you should create one.

EDIT: here you are:

HOWTO including link https://github.com/rusefi/rusefi/wiki/HOWTO_join_slack_channel

login https://rusefi.slack.com/

You can add the "* text oel=lf" in .gitattributes What happens for my projects is that they are always ended with LF. There have been rare cases where I had to fix the CRLF crap, but I only had to do it once and never had any issues again. This is what I'm talking about: https://ekkescorne...

arm-none-eabi-size build/rusefi.elf text data bss dec hex filename 237776 3984 181824 423584 676a0 build/rusefi.elf That was the "Smart build" that was preventing to compile all the files since the configs are in a different folder. https://github.com/rusefi/rusefi/pull/379

https://github.com/rusefi/rusefi/blob/master/.gitattributes#L6 This is messing with line endings on linux... It's best to set it to LF (or autocrlf true) and let git do the conversions. Because of this I won't be able to merge the changes unless I fix a *lot* of files. I never had to touch these set...

You are already using code optimisation, else it would probably not fit in the flash.
LTO is just a better type of optimisation.

I'm having a look at the ChibiOS 3 port.

Also if you want to use LTO with GCC 5/6 you will have to use ChibiOS 3. Why? Is that a Chibios 2 bug? What's the relationship between LTO, GCC 5+ and ChibiIS 3? Migrating rusEfi to ChibiOS 3 is a bit more involved than just pointing at the right version of ChibiOS git. Yes it's a ChibiOS bug as fa...

https://github.com/rusefi/rusefi/blob/master/firmware/Makefile#L62 So yes, softfp is not exactly "FPU is disabled" I see you've edited that, but still a great question why softfp - https://github.com/rusefi/rusefi/issues/375 Yes, it did not do exactly what I first though, but there's defi...