Innovate the production method of small inventions, and the production methods of small scientific a

4. Homemade flashlight.

The specific method of making it is to remove one end of the lid of a waste can (such as a Lulu beverage can) and knock the other end with a round hammer. Roll up two No. 1 batteries with thick corrugated cardboard and put them into the tank with the positive electrode facing up and the negative electrode facing down.

Find a suitable plastic lid (such as a magic big roll lid that can be fastened to Lulu cans) and dig a small circular hole in the lid** in such a size that the bulb is plugged in tightly. Insert the base of the bulb into the small hole. Take a section of wire and peel off the wire skin at both ends, wrap one end around the lamp holder, and pierce a small hole through the side of the plastic cover with the other end.

Place the plastic lid over the can. Check that the bulb and battery are in close contact. At this point, the disposable flashlight is ready.

When using, use your thumb to press the wire threaded from the side wall on the weld that is not painted from the can, the flashlight will glow, and the thumb will jump off the wire, and the flashlight will go out, which is very convenient to use.

5. Homemade solar cooker.

Start by finding a concave reflector on a large flashlight, and then use rigid styrofoam or wood to sharpen a cylinder about 4 cm long, with a diameter just enough to fit into the reflector bowl. Drill a thin hole horizontally at one end of the cylinder, insert a wire with a diameter equivalent to the diameter of the hole, and then fold the two ends of the exposed wire into a 90° right angle, and then leave 5 cm each. Insert the cylinder into the hole in the reflector and insert the ends of the wire into a styrofoam or wooden baseplate.

Then sharpen the two ends of a thin bamboo skewer, insert one end on the cylinder of the reflective bowl**, and insert a small piece of potato at the other end. Place the device in the sun so that the reflector is facing the sun, and then patiently adjust the length of the skewers so that the potatoes are in the right spotlight. It won't be long before the potatoes are roasted in the sunlight and give off their aroma (delicious!!

There are many ways to make small inventions with technology, and the following two are shared:

One. Super soap bubbles.

With wire hangers, you can make huge soap bubbles, and the big bubbles will also wrap small bubbles.

Production process: 1) First make the metal hanger or make a circle, and wrap it on the circle with tape;

2) Put 1 liter of water, 100 ml of family stove cleaner and 500 ml of detergent in a basin;

3) Put the hanger out of the basin and slowly lift it upwards;

4) Make giant bubbles!

2. Homemade badminton.

Prepare materials: 1 empty drink bottle, 2 foam fruit net covers, 1 rubber band, 1 glass marble.

Production process: 1) Take a 250ml empty beverage bottle and cut off the upper part of the bottle;

2) Divide the cut part into 8 equal parts, cut it to the neck of the neck with scissors, and then cut each part into the shape of petals of the same size;

3) Put the foam fruit net sleeve on the outside of the bottle and fix it at the mouth of the bottle with a rubber band;

4) Wrap another foam fruit net sleeve around a glass marble, stuff it into the mouth of the bottle, plug it tightly and expose about 1 cm;

5) Cut off half of the table tennis ball, cover the bottom of the hemisphere on the mouth of the bottle, cut the edge of the four trillion thoughts into a whisker, cover the mouth of the bottle and fix it with a rubber band.

6) After beautifying and grooming, a homemade shuttlecock is completed.