$5 Mini USB Fridge!

Step 6: The Final Result

As you can see by the pictures, this cooler will hold a large bottled water, or a tall 20 oz plastic soda bottle, although my drink of choice is a Starbucks Vanilla Frappucino! The cooler will keep drinks at about 45-50 degrees and works best when your drink is already cold for obvious reasons. Optionally, you could use a 1 amp 7.5 volt DC adapter, which will lower the temperature significantly without making the lower heatsink too hot for placement on regular surfaces. In this instance, I would strongly recommend that you add the 1K limiting resistor in order to keep the DC adapter from becoming hot.

Comments

[Langarulz]

wouldn't it be better to put the heat sink at the top of the cooler?

[bluckie]

no because it becomes less effective if not in contact with the bottle itself, another reason why cans get colder faster.

[tkdkid4]

Would these be ok to deter heat?

http://www.radioshack.com/product/index.jsp?productId=2062343

Thanks for the great Instructable!!!

[ashok0072008]

where can i get that much big heat sink , and it will be great if you explain the steps to make foamboard anyway thanks

[bg01au]

How can I add 1K limiting resistor to reduce the hot side? any instructions how to do this would be appreciated. Great project, well done. Thanks