As part of my learning curve for open source hardware, and basic electronics. This project wont take you very long, maybe an hour at most.
What this does is pretty straight forward, it shows the temperature in real time for both Celsius and Fahrenheit. I’ve added some code to the Nokia, which uses the analogWrite trick (that is, use one of the digital outputs that has a tilde in front of it ( ~ ). This will let you send a modulating frequency, which means you can make the LED (backlight in this case) brighter and dimmer. The brightness of this display is controlled using the trimpot (potentiometer).