Hundreds of science fairs are being organized regularly in different schools, colleges and universities, to encourage students to become interested in science. In addition to various science-related events in these science fairs, students can display paper, project, and poster if they want.
However, if the project/paper/poster complied with some rules, its quality is very good and the likelihood of being chosen as the best leads to increase.
There will be some important advice that will be easy to succeed in the science fair.

Project Ideas

Below there is project ideas and necessary guidance. Each project can be further researched by research. If the presenter feels necessary, you can present these projects under a different name.

Science Project - 1 - Transformation of power to electricity

This project can be done in two ways.

Make a mechanical device from which a liver will be released, if a lever is pressurized, a dynamo will pass through the shafts, which will generate electricity. However, there is a problem with this method, that the machine will have several mechanical parts, so the chances of getting worse will increase. Under the footage of the picture below, the basic idea is to create electricity.

Source image
(The power generation under the foot pressure.)

The second method is to use Piezo element a.k.a piezo transducer.

Very little electricity can be made using the Piezo Element or Piezo Transducer.

Piezo element

Image: Piezo Elements

Usually, a very small and thin speaker is used, where the Pixo Elements are used. For example, some greeting cards are available that can be heard in the open music, in which the piezo elements are used as speakers. There is a microphone called a contact microphone, which is used to record the sounds of musical instruments such as drums, guitars, and even the piezo elements are used.

One feature of Piezo Elements is that, when its shape changes, electricity is generated. For example, if you press the spin on the Piezo Element, then the shape of the piazza will become slightly flat, and then the power will be generated. However, AC power is generated from the piezo element, so you have to convert it to a resistor by converting it into a resume with a diode.

The application of this project

This project can be applied in many places. For example,

Installing a Piezo Element in the Carpet, the electricity will be generated when someone walks on the carpet.
Power pipes can be supplied in the street lamp post by establishing piezo elements on the pavement. Or
Installing a Piezo Element in Shoe Solar can be charged with electricity generated from mobile/power bank etc.

Below is a picture of a foot walking charger, which is still under examination-

image source
Studies have shown that more power can be produced if Pijo Element is kept in the center by placing direct pressure on the piezo without putting pressure on the top and bottom of the piezo (such as cotton/foam).

Here's a special note -

1.If you use more than one piezo element, then you have to connect to parallel. Otherwise, it will not work if all the piezo are not pressed together. And,

2.The amount of electricity generated should be increased or reduced using the voltage regulator/boost converter and filter out the output noise with the capacitor.
Generating electricity will be very low.

Materials needed for this science project

1. Piezo Element / Piezo Transducer
2. 4 diodes (such as 1N4007) - to build bridge rectifiers
3. Cotton / foam

Electrical connection method

Below are shown how to connect the Pizo elements to the bridge rectifier

image source
The way to connect to Pizo elements

The DC obtained in the output can be converted into a suitable capacitor, voltage regulator or converter with the necessary converter. You can see our Power Supply section for such power supply circuits.

Hopefully the project will be very attractive if presenting the project at the science fair in accordance with the above rules. And by making these projects I have given you, you will surely get lot of pleasure, because the joy of your own project is different.
Reference Link:
https://www.sciencebuddies.org/science-fair-projects/science-fair/science-fair-tips-for-success

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