Low-z (LPG, etc.) injector dev. board
Posted: Wed Nov 29, 2023 9:56 pm
Hi,
I've been working on a custom hellen-one board that is able to drive up to 4 low impedance injectors. These are often used in LPG engines or high power applications. The form factor is identical to the microRusEFI, so the exact same housing and connector can be used.
The boards use 4x LM1949 to control injectors and require a little bit of thermal paste to dissipate heat to the aluminum housing.
I have 2 beta versions for sale:
[Left] With ETB controller (DRV8873) and rusEFI wideband controller, 2 issues manually fixed: DRV8873 enable pin externally powered from on-board 3.3V supply and 5V sensor supply IC swapped pins.
[Middle] Alpha version, not intending to sell.
[Right] Without ETB control, only an analog O2 sensor input and not populated 5V sensor supply, 2 issues manually fixed: short-circuit between MCU GND and random trace fixed and sensor 5V connected to on-board 5V supply.
Schematics are included. I can provide [Left] for €80 and [Right] for €40 excl. shipping (about €10 within Europe, about €20 to the USA).
I'm still load testing the [Left] version in my own vehicle and once it's ready I intend to purchase a batch to use and sell. You will receive a discount equal to the purchase price of the beta version for the final version.
Thank you.
I've been working on a custom hellen-one board that is able to drive up to 4 low impedance injectors. These are often used in LPG engines or high power applications. The form factor is identical to the microRusEFI, so the exact same housing and connector can be used.
The boards use 4x LM1949 to control injectors and require a little bit of thermal paste to dissipate heat to the aluminum housing.
I have 2 beta versions for sale:
[Left] With ETB controller (DRV8873) and rusEFI wideband controller, 2 issues manually fixed: DRV8873 enable pin externally powered from on-board 3.3V supply and 5V sensor supply IC swapped pins.
[Middle] Alpha version, not intending to sell.
[Right] Without ETB control, only an analog O2 sensor input and not populated 5V sensor supply, 2 issues manually fixed: short-circuit between MCU GND and random trace fixed and sensor 5V connected to on-board 5V supply.
Schematics are included. I can provide [Left] for €80 and [Right] for €40 excl. shipping (about €10 within Europe, about €20 to the USA).
I'm still load testing the [Left] version in my own vehicle and once it's ready I intend to purchase a batch to use and sell. You will receive a discount equal to the purchase price of the beta version for the final version.
Thank you.
. I happened to come across it during an earlier forum search and used that package while in my garage to flash the prototypes. If I understand correctly I should be able to use the "_discovery" bundles from the build server as the default/standard version for now, right?