Welcome, today I will show you how to build a small air conditioner , the materials are easy to find and
the difficulty is very low, of course, does not have the same power as a true conditioner but given the low spending his
performance is is very good.
the materials to be used are:

-bowl polystyrene (alternative you can use plastic, I chose polystyrene for good thermal characteristics)

-old usb cable

-connection for 9v battery

-two cooling fans, usually are used for the cooling of the CPU or other electronic components

if you prefer you can see the video for view the final result!

Step 1: Cut the Polystyrene

the first thing you will need a polystyrene bowl

Take two fans( I used those to cool the cpu ) remember you will have to place them in a manner that draws air, while the other push off...

cut the polystyrene and place the fan.

Step 2: Prepare the Power Supply

Ok, now you can choose what power supply you prefer
USB Cable:

for usb you have need a old usb cable... cut in half, inside you can found 4 wire: Red, Black , green, white. you have to save only red and black wire.

9volt battery:

for power with 9-volt battery you need a compatible connector.
You can find this connector in a old 9-volt battery and soldering two wires to the two poles

after you have connect the wire together

the + and the -

usually the red wire represent the + pole and the black the - pole