Speeduino

Some more progress....
As i am too busy at the moment there is only slow progress for this controller.
The PCBs arrived from the manufacturer and all looks fine so far. I have flashed all of them and until here all looks fine.
Need to solder the CJ125 and the varistor on the PCBs and also need to do more detailed tests.
Stay tuned.

chaoschris wrote: ↑Fri Jun 19, 2020 9:27 am Some more progress....
As i am too busy at the moment there is only slow progress for this controller.
The PCBs arrived from the manufacturer and all looks fine so far. I have flashed all of them and until here all looks fine.
Need to solder the CJ125 and the varistor on the PCBs and also need to do more detailed tests.
Stay tuned.

how much for this?

Hello all

I throw in also my version of the wideband controller with cj125 and Arduino nano for LSU 4.9
It is a fresh thing, have not ordered the boards for published version yet. But I am quite confident that it should work as I have the thing working on earlier board and there was only some pin assignment changes. Also the firmware Arduino skech included. Currently calibrates and then displays Lambda value and sensor temperature in real time on LCD and outputs wideband lambda analog signal. Narrowband emulation not implemented at the moment.

https://github.com/TBAMax/speeduino/tre ... re/TeemoWB

Regards
Teemo

hi teemo,
think you forgot a resistor see attached file. there is a bosch spezification change 4k7 to 5k11 and 470k to 511k.
tooly

Thanks @tooly

Added the resistor.

Address still the same:https://github.com/TBAMax/speeduino/tre ... re/TeemoWB

Regards
Teemo

Hello all!
I am drawing my own BL49SP board on KiCad and i have few questions about the schematics:

1. "OUT" is 0-5v linear and "PWM" is simulated narrowband but what is the purpose of "IN" connector that go to PC2(ADC2) pin?
2. What state two leds represent, power and heating process?
3. I didnt find AO3400A from Mouser, would this be okay instead?: https://www.mouser.fi/ProductDetail/Inf ... S48UOXVw==

This is what the board looks like at the moment

hi teemo,
think 1N4936 is little less ampere.
tooly

I have moved my design files to the more logical place: https://github.com/TBAMax/WidebandLambda
Just to update, because links that I provided earlier do not work any more.

@tooly thanks, yes 1N4936 is a little too weak so beefier diode has to mounted.

Teemo

JKS17 wrote:what is the purpose of "IN" connector

So looking at the code seems that this need to be grounded when engine is running so code knows to start heating.
i think this replaces need to power controller from FP relay, just configure one of the speeduino outputs to pull "IN" to ground
when RPM > x

I added "IN" and ISP headers, and few routing improvements
just final check for mistakes and then i can order boards

Unfortunately Speeduino only has 2 outputs that can do that.

Fuel pump and VVT.

So it would likely still need to be triggered by the fuel pump relay output of the Speeduino.