The simple content of the video and production of small technology production is as follows:
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1. Steamship Model: Use. Some discarded materials such as plastic bottles, cardboard and glue can be used 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 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 panelsand 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 adjustments 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 ppressure 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 experiment 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 carefullyt and use the appropriate 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 Reflecting: During the production process, remember to record each step and the results of the experiment. This can help you better understand and review your experiences and make improvements to future productions.
Tools and materials
3 lemons (also limesOkay, look for fruits that you think can produce electricity!)
3 shiny copper coins (we use coins)
3 galvanized screws
4 wires, preferably with clips on wires.
A pocket knife
Small stickersmade of paper
Low-voltage light-emitting diodes (LEDs). We use a Radio Shack model 276-330.
A 35mm plastic film case or similar small container. It is best to use an opaque black film casing.
A nail or small punch
Galvanized screws can be purchased at most hardware stores. They are also called “plated” screws. The screws are galvanized to prevent rusting, giving them a shiny appearance. Wires with clips can be purchased at hardware or electronics stores.
How to prepare it
First, turn over all the lemons, one at a time. Squeeze them with your hands as you turn them until they are a little “soft.” This is done to allow more juice to be produced inside the lemon. This step is very important; it will help you get the best results from your lemon battery.
Screw a galvanized screw into a lemon about 1/3 of the way up. Using a knife, carefully make a 1 cm cut in the other third of the lemon.
Note: Knives are best used by adults. Anyway, please use the knife "carefully" and "slowly".
Insert the copper coin into the cutout until half of the coin is in the lemon.
NOTE: Be sure to use new, shiny parts. If the part is old and dull, use scouring pads to polish the part.
Believe it or not, you can now get electricity from lemons! Like any other battery, the coin is its positive (+) terminal and the screw is its negative (-) terminal. Unfortunately, this battery is weak. But if you have several of these cells, you can put them together to form a lemon battery.
Insert the piece and screw it into the other two citrons like this. Then, using wires and pliers, connect the screw of the first lemon to the coin of the second lemon, and so on, thereby connecting the three lemon batteries together. Also secure the wires with clips to the first piece and the last screw.
Finally, mark the clip attached to the first piece with a "+" and the clip attached to the last screw with a "-". Like a real battery, a lemon battery has a positive (+) and negative (-) terminal.
When connected in series like this, these lemon cells together produce the same voltage, or potential, as several small flashlight cells in series, approximately 2.5 volts to 3 volts . But the lemon battery doesn't produce enough current to shine the flashlight bulb.
How do we know that a battery is actually implemented? One option is to connect powered devices that only require 2.5at 3 volts and little current to the battery. A device called a light-emitting diode, also simply called an LED, can be used. Very low voltages and currents can cause LEDs to glow.
The instructions on the box for the LED we used are: 5mm Red LED, 1.8V, 20mA. This means that the LED is 5 millimeters in diameter and requires only 1.8 volts and 20 milliamps of current to emit light. In fact, less than 20 milliamps can cause the LED to glow slightly. Our lemon battery has enough voltage but not enough current. So we need to find a way to observe the faint light. We put it in a film case to block outside light.
Using a nail, carefully drill two small holes halfway up the outside of the film housing. You can ask an adult to help you with this step.
Next, mark a small hole with a “+” and theanother with a "-".
Bend the LED pins in a smooth outward curve. Next, take a closer look at the LED. It's basically round. However, if you tilt it at a certain angle, you will see a flat surface near one of the pins. The pin closest to this flat surface is the negative terminal. In the photo, the left pin is the negative terminal of the LED. Can you see the small flat area near the leftmost pin?
Align the negative pin of the LED with the hole in the film housing marked “-”. Insert the LED into the film housing. Place the negative leg of the LED in the hole marked "-", then the other leg (positive) in the hole marked "+".
Remove the pins from the holes and check that they match what is indicated on the label. Also label the top of the film case. Make sure the LED is facing us.
Let's prepare everything and wait until the last moment. Alignite the "+" side of the film housing containing the LED with the "+" clip from the lemon battery. Place the "-" clip of the lemon battery near the "-" side of the film shell.
Now everything is ready! Connect the positive terminal of the LED to the positive terminal of the lemon battery. Connect the negative terminal of the LED to the negative terminal of the lemon battery. The LED lights up!
But the LED emits very weak light because the current coming from the battery is too low. Black film housings help you see dim lights. The end of the LED acts as a magnifying glass. When you look directly at the LED at the end, the light phenomenon is easily visible.
This proves that you actually succeeded in making a working lemon battery! congratulations!