The specific manufacturing method is: lift one end of an abandoned can (such as Lulu beverage can) and beat the other end with a round hammer. Roll up two 1 batteries with thick corrugated cardboard and put them in a can, with the positive pole facing up and the negative pole facing down. Find a suitable plastic cover (for example, the magic big roll cover can just be buckled on Lulu's beverage can), and dig a round hole in the center of the cover, the size of which is suitable for the light bulb to be inserted tightly. Insert the bulb base into the small hole. Take a section of tracing wire, peel off the wire skin at both ends, wrap one end around the lamp cap, and tie a small hole at the other end from the side of the plastic cover. Put the plastic cover on the jar. Check whether the bulb and battery are in close contact. Disposable flashlights will be ready here. When in use, press the wire on the side wall with your thumb on the unpainted weld of the can, and the flashlight will glow. When the thumb jumps off the wire, the flashlight will go out, which is very convenient to use.
A small fan only needs a small motor, two 5th batteries, some short wires, a solid plastic foam, a pair of scissors and some cardboard!
First, hollow out the solid foam, connect the small motor with wires and stuff it into the foam (to prevent the rotor shaft of the small motor from leaking foam). Connect the wire to the battery, plug it into the foam, cut the small pieces of paper into rows with scissors and put them on the rotor shaft of the small motor!
The invention and production.
A small fan only needs a small motor, two 5th batteries, some short wires, a solid plastic foam, a pair of scissors and some cardboard!
First, hollow out the solid foam, connect the small motor with wires and stuff it into the foam (to prevent the rotor shaft of the small motor from leaking foam). Connect the wire to the battery, plug it into the foam, cut the small pieces of paper into rows with scissors and put them on the rotor shaft of the small motor!
The structure of this automatic water adding device is shown on the right, which consists of a small water tank, a curved thick hose, a medical infusion hose and a pulley device (which can be made of discarded infusion bottles). Wherein, the infusion hose is connected with the faucet (the water quantity of the faucet can be appropriately reduced), the water flow speed is controlled by the pulley device, the other end of the hose is connected with a smaller water storage tank (which can also be modified from a plastic bottle), the upper end of the water storage tank has a small hole through which the infusion hose passes, the rest part is sealed, the bottom of the water tank has a larger hole, and the rest part is also sealed, and a thicker hose passes through this hole and bends in the water tank.
Principle and usage: hang the device on the flowers to be watered, and the water from the faucet will drip into the small water tank below through the infusion hose (the flow rate of water can be controlled). When the water in the small water tank below submerges the curved hose extending from the bottom, the water in the small water tank is completely pumped out due to siphon phenomenon, so that the flowers are automatically watered once, and so on. The amount and frequency of watering each time can be controlled by the pulley device on the infusion hose and the size of the small water tank. If the speed of water drops in the hose is adjusted by the pulley device and the size of the water tank is selected, not only automatic watering can be realized, but also regular watering can be realized (such as watering flowers in the morning or at night).
Advantages and innovations: Experiments show that this automatic watering device has good effect, simple structure, extremely low cost and strong practicability. Everyone can make it by himself, and can realize automatic watering and regular watering, which not only solves the problem of no one watering flowers when going out, but also recycles waste, which is beneficial to environmental protection.
Remarks: If the faucet at home is far away from the flowerpot, you can take a solution: add a sealable large water tank and replace the hose connected to the faucet with a large water tank, so that when you go out, you can water the flowers automatically by adding enough water to the large water tank.