After installing a PLX Wide Band o2 Sensor I wanted to try some long term data logging.
The Air/Fuel Monitor output is connected to the Megajolt Aux input and the Megajolt software does a great job of recording its output for logging and tuning purposes.
I didn't want to drive around with a Laptop in the car so I built this Megajolt Data Logger based on an Arduino with SD card shield.
Click here for Arduino code and construction details.
