How do you make a working model of mini solar car?

Answer 1

You first have to decide what kind of solar you wish to use.

Solar Electricity.

Solar Hot Water (not necessary for a model house, but good to consider for a real house.

Solar heating (passive or active).

Each of the above solar systems have some things in common and some things that would be different. The solar heating probably should be integrated into the home design, but there are a few "soda can" solar heating designs that you might consider.

Ok, now decide what kind of house you wish to use/build. Perhaps you can find an existing dollhouse that would have a little character.

Solar-Electric will be the most spectacular. You might want to do a little testing in the environment where you will display the house. Solar cells usually give about 0.5 volts per cell. An LED requires about 1.5 to 2 volts to run effectively. Too much power and it will burn out, too little and it won't light. However, your power generation of an individual solar cell will be significantly less inside a building than it will be in the direct sunlight.

Most solar-electric home systems use one of 2 types of power. "Battery off grid", or "Grid Attached without batteries". The grid attached gives you power 24/7 no matter what the weather is like. Battery off grid will run out if your batteries run out. A 1.5 volt rechargeable D battery or a pair of them should be sufficient to run LED many lights (possibly requiring a resistor if using a pair), but they would be able to be turned on with or without solar light. For Demo purposes it might be more interesting to build without the battery.

Wire your house with phone wire & LEDs or something similar. Determine the size and number of solar cells you need. Use serial connections to increase voltage and parallel connections to increase power (amps/watts). Resistors can be used for fine adjustments of volts to protect your LEDs. Mount on the roof, with a toggle switch for cutoff.

Solar hot water panels would be "dummy panels") Probably painted black. Weave single stranded electrical wire on the panel to look like pipes, then paint it all black & mount.

If you wish to make a soda-can solar panel, representing the cans with smaller materials might be difficult. Maybe you could find some small rollerbearings and tear them apart and assemble. Talk, to your local mechanic and see if he has some extra wheel bearings that you could play with. You'll need quite a few of them.
A full sized model of the soda-can solar panel would also be a fun demonstration to have on hand, and would be relatively easy to make.

Good luck with your project.

Answer 2

Introduction: Making an electric car is a mechanical engineering challenge often used as a competition for students from 5th grade to 8th grade. An electric car is driven by a DC electric motor, powered by one or two batteries. Transmission of force from the motor to the car axle is accomplished using two pulleys and one rubber band acting as a belt. A simple switch made of a paper clip is used to connect or disconnect the circuit. Wheels are made of larger pulleys with rubber rings as tires. The car chassis is mad of a plastic board, reinforced by wood blocks and eye screws that will also support the axles of the wheels. Some students may prefer to buy all the parts separately and cut all the woods themselves and design their own car; however, most students and teachers prefer to get all the parts in a kit and make changes as they need. With this project students can explore: *A simple propulsion method *Basic gluing techniques and design concepts *Concept of stored chemical energy energy and *converting it to mechanical energy *A simple electric circuitBackground Before invention of gas engines, cars were pulled by horses or other animals. Now gas burning engines are the most popular drive in cars. There are concerns about the air pollutions caused by gas engines and electric cars are entering the market in a fast pace. Electric cars rely the electrical energy stored in batteries, so they will not cause any air pollution. Because of the limited amount of electricity stored in batteries, electric cars must be made very light so they can transfer a longer distance with a limited amount of energy.Assembly Procedure 1. Cut the 30cm basswood piece to make two lengths each 7cm long. 2. Cut the 30cm piece of 4mm dowel to make two lengths each 10cm long. 3. Lay out the components of the kit and cut the plastic tubing into 4 equal pieces. 4. Connect the two wooden blocks to the plastic base using four screw eyes. The screw eyes are placed at an equal distance from the smaller end of the base and at a distance from the edge to accommodate the plastic tubing. A sharp object may be required to start the process of screwing the eye through the plastic and into the wood. 5. Place the axle dowels through the screw eye axle holders 6. Fit the small pulley onto one of the axles and then fit a large pulley onto each axle as a wheel. Put a piece of plastic tubing between the screw eye and the wheel and ensure that the tubing is not too tight against the eye. Finish off the wheel by fitting an O-ring around each pulley. 7. Using the paper clip as a guide poke the brass fasteners through the plastic base and secure them so that the heads of the paper clips are on the side that has the wooden blocks, not the screw eyes. Place the paper clip under one of the brass fasteners. 8. Cut the red wire into two and strip 1cm from each end. Also strip 1cm from each end of the black wire. Connect one end of a red wire to the positive end of the battery holder and the other end of the wire to the brass fastener that is connected to the paper clip. Connect the second red wire to the second brass fastener. Connect the black wire to the negative end of the battery holder. Notice the location of the small pulley. 9. Position the gray motor clip onto the base Push the small black motor pulley onto the shaft of the motor and connect its two terminals to the red and black wire. Position the motor into the motor clip and using an elastic band connect the small motor pulley to the small red pulley as shown above. When the paper clip switch is closed the electrical circuit is made and the electric car will move. Crossing the elastic band will cause the car to move in the opposite direction

Answer 3

nothing