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I purchased two Peltier devices off Ebay in 2008 for a couple of dollars each, with the intention of making a Peltier Fridge. 12 years later I finally started the project. This was something I was curios about, it was never going to serve any practical purpose. "One of those fun to make projects".

It was a lot of work, as precision was required to make many of the parts. It was not built scientifically, is was put together with what ever I could find in the shed. I did have some large heatsinks that I salvaged from old Dell PCs, so this was a good start. I had to buy two cooling fans which I sourced from Ebay cheaply. The Polystyrene box was procured from the local supermarket for free as they throw them away after a single use. The Arduino was one of many such devices I have collected over the years.

My design philosophy was:

• Efficient heat transfer.
• Dissipate as much heat as possible.
• Insulate and seal the cool box as best as possible.

The controller was made with an Arduino, a DS18B20 Temperature Sensor, a 5V relay which switched a high current 12V auto relay. The power supply used is a large 12V 15A switch mode, sourced from Banggood.

It worked well but could only fit 3 soft drink cans. I used it for about 4 months and retired it when my Kids gave me a small bar fridge for Fathers Day. It was good to finally tick this off and get it out of my system!