A solar fan is a mechanical fan powered by solar panels. The solar panels are either mounted on the device or are installed independently. Solar fans mostly do not require secondary power sources other than solar power, as most of them are used for cooling purposes during day time. It runs the fastest when it is the hottest outside providing savings on air conditioning costs

Step 1: Parts and Tools

Parts

DC motor 3-4.5V 7500 RPM http://www.walmart.com/ip/5-Pieces-Toys-DIY-Electr...

Solar panel 6 V 150 mA 0.9 watt https://rover.ebay.com/rover/0/0/0?mpre=https%3A%2...

Piece of wood 16 cm X 8 cm

small switch

popsible sticks

small fan blade

Tools

30 watts soldering iron

hot glue gun

Step 2: Build the Base for the Solar Pane

We want the solar panel rotate, that way the solar panel can always be on the direction of the sun, so the solar panel will receive more energy.

1- Put a medium cap bottle, upside down, on the corner of the piece of wood and stick a nail in the middle of the cap but do not reach the end so the lid can rotate.

2- Now we must place the solar panel at an angle of 45 degrees, for it cut a popsible sticks in half and place it on the back of the solar panel and stick it with glue

Step 3: Build De Base for the Dc Motor

Now let's design the base of the DC motor, this should be higher than the piece of wood so that the fan blades do not touch the ground.

1-Stick two popsicle sticks parallel to each other at a distance of 3 cm

2-Cut a popsicle stick of 3 cm and stick it on top of the two popsicle sticks previously stuck to the base

3- Now we can place our dc motor in its base, we just have to stick with silicone the bottom of the motor to the base

Step 4: Soldering Wires to Dc Motor

i did not have to solder wires to my solar panel because they were already solder, but if your solar panel does not have wires here it is a link how to do it

Step 5: Connect the Switch

Without a means of controlling whether a motor is on or off, it would be difficult or dangerous to use an electric motor. Therefore, installing a switch, such as a "single pole, single throw" switch, is necessary for the proper operation of an electric motor.

1-Cut a length of wire, and strip each end of the wire of 1/2-inch of insulation. Attach one end of this wire to the positive terminal on the power supply. Attach the other end to one of the terminals on the switch.

2-Cut a second length of wire, and strip each end of this wire of 1/2-inch of insulation. Attach one end of this wire to the negative terminal on the power supply. Attach the other end of this wire to the negative terminal on the motor

3-Cut a third length of wire, and strip each end of this wire of 1/2-inch of insulation. Attach one end of this wire to the unconnected terminal on the switch.Connect the other end of this wire to the positive terminal on the DC motor

4-To operate the electrical motor, close the switch (or move switch to the "On" position). To turn the motor off, open the switch (or move the switch to the "Off" position).

Step 6: Testing Phase

Now that your circuit is complete, be sure to electrical tape any loose wires so that they do not break away or come apart from the rest of the design.