I'm very new to using Arduino and I am trying to build a peltier for simply cooling a small 23 gauge needle (which will have water flowing through it) to 14 degrees celcius.
Basically, I have everything set up like this image here. However, the code used was from this garagelab tutorial how-to-use-a-peltier-with-arduino which is no longer available. I've seen this tutorial referenced many times on this forum and was wondering if anyone still had the code and could share it with me.
Youtube tutorials for this topic have not been very helpful in terms of coding so any help would be appreciated.
Thank you very much.
Edit: This is the Peltier unit I am using: TEC1-12706 and planning to use an external power supply