12v Peltier module controled with Arduino

Hello there,

Here is the project description:

A Water Chiller: Peltier module will cool a small radiator. Peltier is 12v. Fan in radiator is 12v. There will be a thermometer on the water output to get a reading of water temperature, and if necessary, manually control the Peltier voltage to increase or decrease temperature.

Question: How do I turn Arduino’s 5v to 12v for the Peltier and the fan?

Thanks a lot for the help.

Use a 12V supply for your devices. When your Arduino board (which one?) does not support 12V input, add a voltage regulator of the proper board supply voltage. In detail the Peltier will consume much power, you'll need relays or transistors to turn 12V devices on or off.

How much water is being chilled, and what is the water contained in. Peltier coolers are extremely inefficient so you may find that the temperature reduction of the water is very small.

Peltier devices typically draw 6-7 amperes at 12V, so make sure your power supply and control circuitry is capable of more current than that.

Pauloesperon: A Water Chiller: Peltier module will cool a small radiator.

Hopefully this is not for an aquarium water chiller. Just a few days ago another guy in this forum came up with that crazy idea.

Pauloesperon: Question: How do I turn Arduino's 5v to 12v for the Peltier and the fan?

MOSFET transistor?

An air cooled Peltier will only cool to around 40 degrees F below the ambient air temperature. Is this cool enough?

Paul