DIY Homemade Mini Fridge Frefrigerator 2 Chiller Air Conditioner 2 Peltier Cooler Thermoelectric

The thermoelectric effect is the direct conversion of temperature differences to electric voltage
and vice versa. A thermoelectric device creates voltage when there is a different temperature on each side. Conversely, when a voltage is applied to it, it creates a temperature difference. At the atomic scale, an applied temperature gradient causes charge carriers in the material to diffuse from the hot side to the cold side

You can use 2 peltier make to mini Frefrigerator very chep and easy

possible to use pwm to control the current... using a microcontroller a feedback system could be implemented
maybe add some more information, like the electronics and stuff.
So... What about the wires? You just connect all the Reds together and the blacks together? And what about a power source? I watched another video from another post that I think was yours too and I had the same questions. Could you further elaborate on these instructions? This would be great for my wife to have in her locker at work. Too many people steal lunches there to use the big fridge.