# How do proportion current for components?

I am making a mini-fridge. On one side is a 150mmx150mm aluminium plate. It has been roughed up to increase surface area. On the other side it has an aluminium CPU cooler which can survive the tdp of the peltier.

I have:

2 x TEC1-12706, 4 x Fan 12V @ 0.2A

A TEC1-12706 is a peltier thermo-electric pad that emits cold on one side and hot on the other. This operates at 12V and at max, 6A. Hence the 12 and 06.

Say if I had a 12V dc power supply, how would I proportion the correct amount of current to these components? So if I want 6A each going to the peltier cooler and the remaining 1A for the fans.

I was thinking a potentiometer will do it but it would not be the best and efficient way.

• Are you trying to control the temperature of something to a specific temperature, or just cool it as much as possible? Jun 19, 2017 at 20:37
• What is a TEC1-12706? Please edit your question to explain it, say what current you think it needs and provide a link to the datasheet. Jun 19, 2017 at 20:47
• The fans will just draw the current they require, when supplied with the correct voltage. You don't need to do anything to proportion or control the fan current. Just "roughing up" (sanding?) the Al plate won't significantly improve its heat dissipation ability - you really need a proper heatsink with lots of fins to dissipate the heat. Jun 19, 2017 at 22:16