Arduino Air / Fuel Ratio with Boost Gauge

So I’m back at it again.  It’s been a year since I’ve touched my arduino air/fuel ratio and boost gauge so I’ve decided to hook it up to my NSX to confirm that it works.    If you want to read the write of how it was put together and programed, check it out here.   Anyhow this setup was reconstructed and then connected to my car.  I hooked up a stock Honda map sensor the the input of my arduino.  The analog output from the LC1 a/f ratio gauge was connected to the second input on my arduino.  Before turning on the car, I had to change the analog output from the LC1 to output 0v as 8 a/f ratio and 5v as 22 a/f ratio.   I’ve then proceeded to turn on the car to see the results.  See the Video for confirmation.

Stay tuned.  I’m going to be converting the LCD to use i2c communication instead of the tradition connection that it’s currently in.  Afterward, I’m probably going to test out a transistor to control a boost solenoid.  The idea is to have it implemented to the original A/F Ratio and Boost gauge.

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