Hi to all.
I had the reading stability issue when you connect the LM-2 to EIO plug on VCM Scanner,
The LM-2 Analogue Out 1 this is the issue, it is Pulse Width Modulated not true analogue causing the readings to go from min to max very fast, i see some have tried ms filter and lower the effective AFR range to try and stable the readings.
Ground offset is NOT the problem either.
I found none of these band-aid fixes viable so,
I have built a Digital to Analogue converter, which has completely solved the problem.
It is now as stable as and accurate from 7.35 to 22.39:1 AFR.
What ever is on the screen of the LM-2 is also on the screen in VCM Scanner.
So problem fixed and solved..
While I was at it I made Exhaust Temp circuit to read and display EGT and a dial knob to display o-5v to log any audible knock, on VCM Scanner, I thought nice add on's for data logging..
Base Converter 1 channel of data converted.
IMG_2505.JPG