🧊 Pack of 5 TEC1-12705 TEC Thermoelectric Cooler Heat Sink Cooling Peltier Plate Modules 40x40mm 12V 30W Review

So I take one out to show and I want it to be "real" cold (and warm) but instead it just falls apart when it's pushed to its cracking limits. . I had white crumbs all over it :) But if you don't press it you get cold/warm effects and you can certainly use this in smaller projects if you want to add warmth or coolness to the case. . It's a fun toy and learning moment. That's all.

Bought these to try and cool an outdoor camera and they work as advertised. My first impression was when I held it in my fingers and waited for a slight temperature change. Hooked it up to a 12 volt battery and had to throw it away almost immediately. It was only now that I realized that although my index finger was almost burned, my thumb was icy. I can understand why people say they will self-destruct if they don't have a way to dissipate heat, but c'mon - pumping heat from side to side is…

Surprisingly all the packages arrived in good condition. This was a surprise given the poor packaging and other purchases from this supplier that arrived broken and non-functional. Performance is what you would expect from a Chinese 12706. Performance is a bit slower than the US but more expensive TECs, but it's consistent between devices, and in testing I was able to get a mid-size cooler to 26 degrees Fahrenheit (ambient 67 degrees Fahrenheit) with the hot side of a liquid-cooled one Water…

Four of the five such devices. Good quality. They are within about 10% of each other and about 5% of the specifications. One unit is very, very far from the left edge, to the point where I had to check the parts label to make sure it was in the same family. It's about 50% off spec in almost every way you can look at it. (Yes, I am aware that some of these parameters are non-linear, approximate values are given for this review.) The element impedance is +55% higher than the static FC…