I'm new here so don't really know the etiquette ect.. so tell me if I'm doing it wrong!
So I'm currently trying to log cylinder head temperature on my 2CV using thermocouples and I keep getting a lot of strange characters on the screen:
These characters appear only with the engine running, with or without thermocouples connected. It also happens with the Arduino anywhere in the car, powered by the laptop or the car. I tried in vain to decrease the interference (I assume that's the cause) by covering the coil in foil, this had no effect at all.
A bit about the Car - There's very little to it electrically, essentially an alternator, lights front and rear and one wasted spark coil.
I'm using an Adafruit Thermocouple Amplifier MAX31855, an Uno Rev 3 Board, an LCD screen like this - http://oomlout.co.uk/collections/extra-pieces/products/lcd-display-16x2-charachters and will be using http://oomlout.co.uk/collections/arduino/products/arduino-datalogging-shield-adafruit one of these to record the data I gather, but I can't read Japanese (I assume thats what it is??) so could some one here advise me on what is causing this and how to eliminate it?
Thanks for any help you can offer!