MSefi.com read only forum (Jan.15,2018)

I am intending to buy a Megasquirt II board
I need to verify the compatibility of the interfaces

I have AutoMeter O2 wideband Air/Fuel Ratio Pro-Comp Ultra-Lite indicator with a 0 to 4 volt output representing 10.0 to 17.0 Air to fuel ratio
The output scale is linear

I prefer to keep the indicator

What is the board expecting by design
How to hook the DC output to the MegaSquirt II O2 sensor input?
Do I need to do any modification to the software?
Thanks
Reda

Reda wrote:I am intending to buy a Megasquirt II board
I need to verify the compatibility of the interfaces

I have AutoMeter O2 wideband Air/Fuel Ratio Pro-Comp Ultra-Lite indicator with a 0 to 4 volt output representing 10.0 to 17.0 Air to fuel ratio
The output scale is linear

I prefer to keep the indicator

What is the board expecting by design

An analog voltage with a maximum reading of 5 volts and a minimum of 0 volts. The curve is defined by the software.

How to hook the DC output to the MegaSquirt II O2 sensor input?

Wire the analog output to MS pin 23.

Do I need to do any modification to the software?
Thanks
Reda

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Go to Tools -> Calibrate AFR Table and send the settings needed.