Simple tech gadgets are in a hurry

Homemade hot air balloons.

1.First of all, we cut 6 to 8 leaf-shaped pieces of paper out of soft paper.

2.Fold them in half and glue their edges together to make a balloon.

3.Tape the four wires to the bottom of the balloon. Attach the other end of the thread to the table with plasticine.

4.Try to turn the speed of the hair dryer as slowly as possible. Aim the blower up at the bottom opening and turn the switch on. The balloon will slowly grow larger, tighten the string, and leave the table.

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 piece of wire hunt and peel off the wire skin at both ends, wrap one end around the lamp base, 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.

Use plastic bottles to make all sorts of things, like flower pots, waterers.

Mineral water bottle, 1 piece, unscrew the cap, cut it from the middle and divide it into two sections, and put the upper section in turn on the inside of the lower section, you can put soap, such a soap box solves the problem of soap being soaked in water.

There are materials in the home, and there is scientific and technological content.

A small fan, just a small motor, two size 5 batteries, some short wires, a solid plastic foam, a pair of scissors, some pieces of cardboard!

First of all, hollow out the solid foam, connect the small motor with a wire, stuff it into the foam (to keep the rotor shaft of the small motor leaking foam), connect the wire to the battery, also stuff it into the foam, cut the small piece of paper into rows with scissors, and put it on the rotor shaft of the small motor!

Say invention making.

A small fan, just a small motor, two size 5 batteries, some short wires, a solid plastic foam, a pair of scissors, some pieces of cardboard!

First of all, hollow out the solid foam, connect the small motor with a wire, stuff it into the foam (to keep the rotor shaft of the small motor leaking foam), connect the wire to the battery, also stuff it into the foam, cut the small piece of paper into rows with scissors, and put it on the rotor shaft of the small motor!

Sprinkler bottles. Just take a jar and poke a few holes in the tail.

Take an empty egg shell and coat it with wax (be thin).

Paint on it with a pointed object (to carve through the wax).

Put it in vinegar for a few hours, take it out and get rid of the wax.

The color of the carved place is darkened with acetate.

It's a small production!

3 simple technologies to make practical inventions.

Please prepare: plastic bottles, crepe paper, watermelon seeds, green flannel, plasticine box handles, cardboard production method: 1. Red, yellow, and blue crepe paper are cut into ripples and pasted under the bottle to make a skirt.

2. Cut the brown cardboard into thin strips, stick it above the bottle mouth, and curl the end outward into curls. 3. Wrap a green flannel around the bottle mouth. 4. Cut flowers and leaves with cardboard and stick them on the handle of the plasticine box, use watermelon seeds as eyes, and wrinkled paper strips as mouths (if you can't find them, you can replace them with others) Two cute little angels, please prepare:

Table tennis, badminton, feathers on colored shuttlecocks, colored sticks, wool, cotton, cardboard. 1. Dip a piece of blue cardboard with light blue round cardboard. 2. Make hair with wool at one end of the table tennis ball and stick it on the light blue round cardboard.

3. Cut the shuttlecock in half to make the bodies of two cherubs. 4. Bend the colored sticks to make the hands of two little angels. 5. Glue the feathers on the shuttlecock to make wings.

6. Cut out the eyes and mouth with cardboard, and make white clouds with cotton. (After an afternoon, don't let it down).

Roll paper refills to make pen holders.

Tools: white latex, scissors, roll paper core 1 piece, cardboard (hardness greater than or equal to production: 1Use scissors to cut out a piece of cardboard on the cardboard that is larger than the roll core. 2.Glue the roll core to the cardboard with white latex.

Extension: 1Multiple roll cores of different heights can be glued side by side to the cardboard. 2.You can glue the roll paper core horizontally. 3.The core of the single-sided tape can be glued to the roll paper core that is placed horizontally. But to glue a piece of cardboard underneath the single-sided tape.

Homemade shuttlecocks.

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

Production process:1Take a 250ml empty beverage bottle and cut off the top half 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 foamed fruit net 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 ping pong ball, cover the bottom of the hemisphere on the mouth of the bottle, cut the four sides into a whisker, cover the mouth of the bottle and fix it with a rubber band.

6.After beautification and retouching, a homemade shuttlecock was completed. Hit a dozen with a badminton racket and see how it goes?

Homemade soap paper.

Materials and tools for crafting:

Hygroscopic white paper, small pieces of soap, a brush and disposable beverage cans.

Production method: first chop the soap and put it in the jar, put the cup on the stove after filling the appropriate amount of water, wait for the soap to melt, cut the white paper into the size of a matchbox, apply the soap liquid one by one, and then take it out to dry it to become soap paper.

Homemade hot air balloons.

1.First of all, we cut 6 to 8 leaf-shaped pieces of paper out of soft paper.

2.Fold them in half and glue their edges together to make a balloon.

3.Tape the four wires to the bottom of the balloon. Attach the other end of the thread to the table with plasticine.

4.Try to turn the speed of the hair dryer as slowly as possible. Aim the blower up at the bottom opening and turn the switch on. The balloon will slowly grow larger, tighten the string, and leave the table.

Don't know what you're going to make?

This is a simple matchbox microscope with a single lens with high magnification. It is very easy to carry and use. The materials for the production are also easy to find:

One matchbox shell, one small glass bead (you can replace the small glass bead at the front end of the concentrating light bead), two inner matches box, a small piece of glass, a small piece of glass mirror, and adhesive tape and glue.

The process of making is also very simple, first hollow out the inner box of a matchbox, cut off the horizontal bar at one end, tie a small hole in the middle of the other end that is just the size of the glass beads, put the glass beads in, cover it with a white paper with a small hole equal to the diameter of the glass beads in the center, and the first step is completed. The second step is to open a small long hole of about one centimeter in front of the lens of another match, glue a piece of glass to the hole, and glue it firmly with adhesive tape, so that the stage is finished. The lens holder only needs to cut a square hole on one side of the label as the entrance port.

The fourth and final step is to install the mirror: glue the back of the mirror, fold it back 90 degrees, and stick it to the lower end of the inner box of the matchbox to make the mirror tilted.

To use, place the object to be observed on the glass on the stage, and insert the lens holder so that the small window is facing the light source. Adjust the height and you can see the magnified object clearly.

A that fights.

This is a simple toy made of magnetism.

Supplies needed: small iron sheets, cardstock, scissors, a bar magnet, glass plate (or thick cardboard) Production method:

1. Draw two roosters on cardstock and cut them out with scissors.

2. Cut two small pieces of iron and bend them into an arc-shaped pry plate, and fix the rooster on the arc-shaped pry board.

3. Find a bar magnet, put the rooster on the glass plate (or thick cardboard), slide the magnet left and right, due to the effect of magnetism, the rooster will fight.

Gift boxes for life. Put colored cardboard on the outer packaging of the usual shoebox, and tie a bow around it to decorate it slightly.

You can't just rely on the Internet, but also think about it.

3 simple technologies to make practical inventions.

Automatic water feeder:

First, the working principle is from.

The atmospheric pressure is used to automatically control the water output, so as to achieve the purpose of automatic water supply.

Second, the production method.

1. Material preparation: one 1000ml cola bottle, one mineral water bottle, 40 cm diameter plastic tube.

2. Assembly steps:

1) Drill 2 cm diameter holes in the cap of the mineral water bottle.

2) Cut the plastic pipe into a length of 30 cm for the positioning water pipe and 10 cm for the water supply pipe, and insert them respectively, one of the long ones is inserted into the bottom of the bottle, and the other is inserted into the mouth of the bottle.

3) Take the bottom 10 cm of the cola bottle and cut it out as a water basin, and drill a hole with a diameter of centimeters on the top and bottom of the water basin.

4) Insert the water supply pipe into the lower hole, and position the water pipe into the lower hole.

5) Use iron wire to connect the water bottle and the basin.

3. How to use.

1. Unscrew the cap of the water bottle and pour it back into the basin, and pour an appropriate amount of water into the basin.

2. When the water in the basin is lower than the water line, the water in the water bottle will flow out. When the water in the basin is above the water level, the water bottle stops supplying water again.

Fourth, the scope of application: to feed small animals with water.

Concave mirrors, like convex lenses, can focus light to one point, and below is a diagram of its optical path.

Note that the mirror surface of a concave mirror is not spherical, but parabolic. Our ancestors began to use this principle to make fire as early as the Zhou Dynasty more than 3,000 years ago. Below is a concave mirror made of bronze in ancient times, called "Yang Sui".

In this article, I will teach you how to make a concave mirror that can make a fire from the most common material, a can. First of all, we choose a can, we need to polish and polish the concave surface of the bottom of the can to make a concave mirror. Cans are made of aluminum and iron, and I personally think aluminum is better, because aluminum is softer than iron, easy to sand, and has better reflective properties.

The one on the left in the picture below is made of aluminum, and the one on the right is made of iron. Generally, the cola cans are made of iron, and the concave surface on the left in the picture is relatively smooth, which is for beer.

First, use sandpaper to sand off the logo and protective coating on the underside of the can. The finer the sandpaper, the better, I used 1500 mesh, 32 00 mesh is better. It doesn't matter if you don't have that fine sandpaper, because the sandpaper will grind finer and finer on its own.

Then find a fine soft cotton cloth, dip it in some toothpaste, and sand the concave surface repeatedly.

Hold a match in focus, so that the sunlight is just focused on the match head, and after a while, you can see the match head being lit.

Note: Because of the small size of this concave mirror and the fact that the parabolic accuracy is not very high (after all, cans are not made to do this), it is not easy to light matches with it. In summer, at noon, when the weather is sunny and windless, it can take 5 to 10 minutes.

In the warmer regions of the south, it should be easier. Not all cans are suitable for concave mirrors, and if you find that the carefully polished bottom of the can is difficult to focus the light to a point, then you need to change the can and repeat your work ......

Homemade hot air bai ball 1First of all, we cut out 6 or 8 leaf-shaped pieces of paper out of soft paper. 2.Fold them in half.

Zhi and glue their edges together to make an airtight ball. 3.Tape the four wires to the bottom of the balloon.

Attach the other end of the thread to the table with plasticine. 4.Try to turn the speed of the hair dryer as slowly as possible.

Align the blower with the opening at the bottom up and turn on the switch. The balloon will slowly grow larger, tighten the string, and leave the table.

Shidafu Autonomous Prefecture Autonomous Prefecture Autonomous Prefecture.

Technological inventions must be creative, otherwise they will be called inventions, and everyone can be an inventor. It's easy to say that small science and technology productions don't have to ask others, search on the Internet, too many production instructions, **, find a favorite one to do.