Steps for making a homemade flashlight by hand are as follows:
Preparing materials: tape, cardboard, battery, small LED bulb , 20CM fine wire, lighter.
Operation steps:
1. Wrap the battery with paper into a cylindrical shape, then secure it with tape without sealing.
2. Use a lighter to burn the plastic on both ends of the thin wire. The heated plastic will not solidify and stick to the negative terminal of the power supply, then reinforce it with tape to seal it. the opening.
3. Attach the positive terminal of the bulb to the positive terminal of the power supply with tape, then seal it tightly.
4. Use tape to wrap the wires, then leave just a few inches at the other end of the paper tube, and stick a small piece of tape over the wire at that end.
5.In this way you have made a handmade flashlight.
Simple video of small science and technology crafts
The craft methods of the Science and Technology Festival are as follows:< /strong>
1. Use recycled materials to make a solar wind turbine: Find discarded plastic bottles and solar panels, assemble them together and make a simple solar wind turbine. When sunlight hits the solar panels, the windmill spins.
2. Make a Fruit Battery: All you need is some fruit, some wire, and a voltmeter to make your own fruit battery. By measuring the voltage of fruit batteries, you can learn about the power-producing capabilities of different fruits.
3. Make a small model of a volcanic eruption: using clay, plastic foamand red food coloring, you can create a small, realistic model of a volcanic eruption. Simply add Styrofoam to the model and dye it with red food coloring to simulate a volcanic eruption.
4. Make a Simple Seismograph: Using small balls, thin wires and plastic bottles, you can make a simple seismograph. When the ground shakes, the ball falls into the plastic bottle, allowing the earthquake to be detected.
5. Make Water Rockets: All you need is a few plastic bottles, some tape, and air pumps to make your own water rockets. By inflating the bottle and then pushing the water out of the bottle, you can make a water rocket fly through the air.
Characteristics of short works for the Science and Technology Festival
1. Innovation: The main characteristic of short worksfor the Science and Technology Festival is innovation. These small works are often conceived, designed and produced by the candidates themselves and feature unique innovation and novelty. Competitors usually use the latest technologies and materials to realize their ideas, demonstrating a unique sense of innovation and technology.
2. Scientific nature: Science and Technology Festival short works usually involve the application of scientific knowledge and technology. During the process of designing and producing these works, candidates are expected to conduct extensive research and understand relevant scientific principles and techniques, and apply them to their own works. Therefore, these small works have a strong scientific and technical character, allowing the public to understand and understand the principles and applications of science andof technology.
3. Interesting: The short works of the Science and Technology Festival are usually very interesting and interactive, and can attract the audience's attention and interest. Applicants typically use a variety of methods to make their works more interesting and interactive, such as adding sound, light, touch and other sensors, or designing devices that can interact with the audience.
The simple content of the video and production of small technology production is as follows:
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1. Steamboat Model: Use discarded materials like plastic bottles, cardboard, and glue to create a simple steamboat model. First, plastic bottles are used to make the hull, then cardboard to make the paddles and rudders, and finally the steamboat is propelled by heating water.e water to generate steam.
2. Small Generator: Using copper wire, magnets, and magnetic coils, you can make a simple small generator. Copper wire is wound around a magnetic coil and placed over the magnet. When the magnetic coil rotates, an electric current is generated, thereby generating electricity.
3. Solar Panel Model: Using small solar panels and LED lights, you can create a simple model of a solar power generation system. Connect the solar panel to the LED light and when sunlight hits the solar panel, the LED light will turn on.
4. Paper Airplane Design: Making paper airplanes is a simple and interesting little technology production project. You can use a piece of paper and fold it in a specific way to design different types of paper airplanes. Try different designs and key adjustmentss to see which design flies further or is more stable.
5. Water Rocket Experiment: Using discarded plastic bottles and compressed air, you can make a simple water rocket. Pour water into the plastic bottle, then quickly turn the bottle upside down and place it on the floor. Use a compressed air pump or tank to inject compressed air into the bottle. When the pressure builds up to a certain level, the water rocket will be ejected at high speed.
Technical craft skills:
1. Planning and preparation: Before you start directing, make sure you have a clear plan. Be clear about the project you want to complete and make a list of the materials and tools needed. This avoids surprises or interruptions during production.
2. Safety First: Always prioritize safety during any experienceence or production process. Make sure you understand the potential hazards of the materials and tools you use and take appropriate protective measures, such as wearing gloves, glasses, etc.
3. Care and Precision: Technology production typically requires precise measuring and assembly. When making cuts, welds or connections, be sure to measure carefully and use the correct tools to ensure accuracy.
4. Testing and adjustment: Technology production is a process of constant testing and adjustment. Don't get discouraged if your project doesn't work or doesn't work well. Try different methods and adjust settings to find the best solution.
5. Recording and Reflection: During the production process, remember to record each step and the results of the experiment. This can help you better understand and revView your experiences and make improvements to future productions.