Home Made Refrigerator With Smart Control Functionality (Deep Freezer)

Hello Friends this is Part 2 of DIY refrigerator based on peltier module , in this part we utilize 2 peltier module instead of 1 , we also use a thermal controller to set desired temperature to save a bit of energy.

For More Info please watch video.

Make housing for your Refrigerator using this dimension.

You can use any cooling system with big/thin fin heat sink, mine is Intel Cooling Fan From P3 PC Because P3 PC generates Lots of heat so heat sink can be massive.

Use this wiring diagram to connect all parts together.

1. Peltier Module.
2. Cooling System.
3. Temperature Controller.
4. Polystyrene/Thermocol.
5. 5mm Ply Wood.
6. Aluminium Foil.
7. 12 volt 10 Amp Power supply.
8. thermal grease.

Use Of temperature controller can make this project smart.

Make Custom PCB for Connecting Fan and Various Parts.

Use Big Relay Instead of using builtin relay on Temperature controller. Use Flyback diode with relay as shown in picture.

Use Bigger cooling fan to dissipate heat produced by peltier.

You can clearly noticed that i use back side for wiring.

Result:-

• This refrigerator can reach below 20'C (Surrounding temperature 39'C).
• Requires 12 volt 6Amp power Source.
• Efficiency is 30-40%.
• Works Great For Maintaining Desired Temperature Between 35'C-20'C (Environment temp 40'C).
• Use of temperature controller can save a little bit of energy.

Make Your Own and let me notify If have Any Problem related to this project.

Thank You

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