science

                           HOW to make a solar house

 

Glue six solar cells to the slanted roof of a model house. Note that each cell has a positive (+) and a negative (-) terminal. Mount them so that the positive terminal on each cell is near the peak of the roof.

Connect a short piece of hook-up wire from the negative terminal of the first cell to the positive terminal on the second cell using a soldering pencil. Use your wire cutter to 1/2 inch of insulation off of each end of the piece of wire. Similarly, connect the negative terminal of the second cell to the positive terminal of the third; the negative of the third to the positive of the fourth, and so on. This places the solar cells in a series, which adds together the voltage generated by each cell. Each of these cells produces about a half volt of electricity, so your solar array will generate about 3 volts (.5 volts times six cells). The positive terminal of the first cell and the negative terminal of the sixth cell will not have any connections at this time.

Place two white LED lights inside the model house, perhaps placing one in the living room and one in the bedroom, and glue them into position.

Solder a piece of hook-up wire from the positive terminal on the first solar cell to the positive lead on one of the LEDs. Solder another piece of hook-up wire from the positive terminal on the first solar cell to the positive lead on the other LED. LED leads have polarity, as do solar cells. The LED package they come in will show you how to identify which of the LED leads is positive and which is negative, as there are several different indicators that manufacturers may use.

Solder a piece of hook-up wire from the negative terminal on the sixth solar cell to the negative lead on one of the LEDs, and solder another piece of hook-up wire from the negative terminal on the sixth solar cell to the negative lead on the other LED. This places the LEDs in parallel with the solar array.

Place a desk lamp near the model house and turn on the light, representing the sun. The lights in the house will go on.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               

Materials required for the construction of Solar Car for Science Fair Projects:

  • Light weight wood or coroplast frame.
  • Axels (4 No.s)
  • Wheels (4 No.s)
  • Eye Screws (4No.s)
  • Gum
  • Adhesive material and Tape
  • driver
  • DC Motor
  • Solar Panel
  • Gears or pulley
  • Marker and Knife
  • Player etc.

Step By Step Procedure for making Solar Car for Science Fair Projects:

  • First take a Coroplast frame or light weight wood having 5cm width for holding the motor, solar panel, axels and wheels.
  • Mark four locations for the eye screws, where we want to fix the axel.
  • Fix the eye screws firmly on the surface.

Solar Powered Car Solar Powered Car

 Fig 1: Fix the eye screws firmly                                  Fig 2: Axel Fixing into the eye screws

  • Eye screws are used for carrying the axel, and the axel should spin freely, so it should be properly fixed with the eye screws.
  • Provide a spacer using any plastic tubes or straws between the eye and the wheels.
  • Now insert the wheels into the axels.

Fix the eye screws firmly  motor for solar powered car

 Fig 3: After fixing the four wheels                                       Fig 4: Motor Used in solar car

  • Similarly fix the other wheels too. Now the arrangement will look as shown in the figure.
  • The small pulley or the gear should be inserted into the motors shaft. After that using an adhesive, place the motor and solar panel on the solar car surface as shown in figure.

solar powered car​  solar car

Fig 5: Solar Car – Solar Panel Placed Horizontally                   Fig 6: Solar Car – Solar Panel Placed Tilted

  • Now move the solar car towards and forward until the gears engaged properly with the wheel.
  • Properly connect the motor with the solar panel using wires and clips.
  • Now recheck the solar panel connections with the motor in the cars surface.
  • The solar panel should be placed horizontally or in tilted position as shown in the figures so as to achieve maximum radiation from the sun. Solar panel should be mount firmly using tape or gum on the solar car surface.

Analyzing Data:

After the completion of all the arrangements and connections, take the solar powered car outside a sunny location and place the solar car and test the solar car. Check whether the wheels rotate, while the solar powered car is in our hand or in the ground?

Now place the solar car in such a way that the solar panel is facing towards the sun and make sure that the solar panel gets maximum radiation from the sun.

If there is no sunny location outside, we can test our solar powered car with a lamp having strong light (120 Watt) and reflector. Just place the solar car two feet under the strong light for sometimes. Now test the solar car and enjoy the riding… We can modify this solar powered car by adding more features and decorations according to our imagination and creativity… and enjoy your own solar car riding and have fun….

 

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