/challenges-projects/design-challenges/sustain-the-world-design-challenge/b/blog/posts/sustain-the-world---smart-portable-freezer-2-the-cooling-peltier1. The Cooling Peltier 2. Thermal Energy Harvesting 3. How to use 1. The Cooling PeltierHere is the picture , with nameplate rating 12V The principle is simple, as the following picture shows, I have just fetch the pic from other web directlyen-USTelligent Community 12https://community.element14.com/challenges-projects/design-challenges/sustain-the-world-design-challenge/b/blog/posts/sustain-the-world---smart-portable-freezer-2-the-cooling-peltierWed, 26 Aug 2020 13:13:58 GMT93d5dcb4-84c2-446f-b2cb-99731719e767:80289505-f108-434c-ab85-f442c821d129rati890<p>Nice Idea! I used peltieres once and needed 3.3V. It took me in the end over 4 peltiers with a high temperatur difference/temp gradient to achieve it. </p><p>But in the end, it was quite hard to get a constant voltage of at least 3V.. </p><img src="https://community.element14.com/aggbug?PostID=9784&AppID=260&AppType=Weblog&ContentType=0" width="1" height="1">