DIY Air Conditioner

This is my simple take on a DIY air conditioner. The cooling effect results from water evaporating. In order to increase this effect, I'm using a pump with a mist nozzle and a fan. The pump and the fan are powered by a 12V solar battery, so the system works well off the grid too. For this instructable you will need:

• a bucket (a standard sized 5 gallon bucket will do great)
• a 12V pump like this one
• a 12V fan with a suction cup like this one
• a 12V battery
• 3ft/1m of silicone hose
• a micro mist nozzle, I have used this by Gardena

• Fill the bucket with tap water.
• A gallon/ 5 liter will be enough.

• Insert the micro nozzle into the silicone hose.
• Insert the silicon hose into the outflow of the pump.
• Put the pump into the bucket with water.

• Put the fan inside the bucket.
• Moisten the suction cup before putting it on the inside wall of the bucket, so it will stick better.
• The fan faces upwards and should be close to the top of the bucket.

• Connect the positive wires of the pump and the fan (red) by twisting.
• Connect the negative wires of the pump and the fan (black) by twisting.
• Make a final check: Ensure that the pump is under water. The silicone hose should lead to the top of the bucket with the mist nozzle facing downwards into the bucket.
• Now you can connect the wires to the 12V battery. Negative to negative (black), positive to positive (red)

Now your DIY AC should be working! I achieve a temperature reduction of about 25%. Due to its small size this AC is only useful for a single room (e.g. bedroom or small cabin). However it's simple but effective. Enjoy!

PS: If you like this Instructable, please support me in the Water contest. Thanks!