A method of small production of science and technology, small production and production method of sc

How to make the ball picker:

1.Drill a hole in the bottom of the bottle, put scissors in it, and cut the bottom into a plastic strip around the center (make it the largest and attach the bottle).

2.Cut the upper part of the water bottle into a circle about 5 cm in diameter.

3.Glue the mouth of the bottle of mineral water to a tube of about 30 cm (harder).

4。Place the ping pong ball on the ground, take the tube and push the bottom of the water bottle down against the ping pong ball, and try to push the ping pong ball into the bottle.

5If you can put it in the bottle, you're done!

Interested in a tech critter to assemble traffic lights? The scientific principle is the series and parallel connection of circuits.

The accessories you need are:

Body base: Column (flat) 1, 1 traffic light stand, 3 lamp back seats, switch board, battery box, switch pole piece, 3 millet beads.

1.Assemble the pillar and base together to form a stand. Then attach the traffic lamp holder to the bracket. Connect one of the wires on the battery box with the three-light connection wire on the traffic light holder, and then connect the other end of the battery box with a wire and a switch board.

2.Connect the other end of the switch board with the remaining three wires of the traffic light. (to be connected to the three switching pole pieces separately) at this time, a series circuit is formed.

3.Put two No. 5 batteries into the battery compartment and slide the switch. See if one of the bulbs is glowing.

Slide the switch again and connect it to the switch pole piece connected to the red light to see if the red light is on. It is connected to the switch pole piece connected by yellow light and green light in turn. See if the yellow light and green light are on in turn.

The small production and production methods of science and technology are as follows:

1. Homemade badminton

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

Take a 250ml empty beverage bottle and cut off the top half of the bottle; Divide the cut parts into 8 equal parts, cut them to the neck of the neck with scissors, and then cut each part into the shape of petals of the same size.

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; 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; 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. After beautification and retouching, a homemade shuttlecock was completed. Hit a dozen with a badminton racket.

2. Homemade soap paper

Materials and tools: white paper with good moisture absorption, small pieces of soap, a brush and disposable beverage cans. Directions:

First, chop the soap and put it in a jar, put the cup on the stove after filling it with an 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.

3. Homemade hot air balloons

First of all, we cut 6 to 8 leaf-shaped pieces of paper out of soft paper. Fold them in half and glue their edges together to make a balloon. Tape the four wires to the bottom of the balloon.

Attach the other end of the thread to the table with plasticine. 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.

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 the magic big roll lid that fits nicely onto the Lulu can).

Dig a small circular hole in the lid** of the box, the size of the hole is suitable for the bulb to be 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, Xian La uses his thumb to press the wire worn out of the sidewall on the weld seam without paint from the can, the flashlight will glow, and the thumb will leave the guide brother to jump back to the slip line, and the flashlight will be extinguished, which is very convenient to use.

Small scientific and technological productions must have a certain scientific content. So I suggest you do a simple electroscope:

1.We know that usually we will find some old batteries in our drawers, but we don't know if there is any power left, and it is troublesome to check it if we put it in and there is no way to know how much power is left. So, you can make a small electroscope.

The method is as simple as this: use a small light bulb, a very small one (like the one on a pendant or toy lamp, which is sold in hardware stores). Then connect two thin enameled wires to the lamp separately.

The other end of the two wires is used to connect the positive and negative poles of the battery you want to inspect. According to the brightness of the small bulb, you can judge the battery level.

2.Take a broken umbrella, remove the cloth, take a wire, connect one end to the TV or radio, and the other end to the umbrella, it is a good signal receiver. If you want to be professional, just wrap a few more wires around the umbrella.

It's the most cost-effective, quickest way, and just a little hilarious.

3Put a match and a large needle together with a quilt, wrap them tightly with the aluminum foil of the cigarette pack, and then bend the aluminum foil at the end of the match head to seal and twist tightly. Then attach a directional tail near the tail and pull the needle out, and it becomes a very simple recoil rocket.

During the experiment, a small rocket was placed on a wire stand, a match was lit, and the part of the aluminum foil tube wrapped in the match head was heated. When the temperature rises to the ignition point of the match head, the matchbox in the foil is ignited, causing the surrounding air to expand dramatically, and the gas is ejected from the tail mouth at high speed. As a result of the recoil, the bazooka flew forward from the rack.

If you wrap two head-to-head matches in aluminum foil, leave them unclosed at both ends. Place it on top and heat it from the middle. When the match in the barrel is lit, the gas is ejected from both ends, and the foil cylinder remains on the rack, thus indicating the conservation of momentum in the system.

4. Riveting two identical protractors at the center of the circle and can rotate flexibly, the upper protractor is a gap of l centimeters long along the right end, when measuring the angle, let its opening coincide with the two sides of the angle to be measured, and the scale indicated by the notch is the degree of this angle; When drawing the corners, first align the notch with the specified scale, and then draw two rays along the opening. This protractor can also measure the angle of three-dimensional objects such as nuts.

Because this kind of protractor resembles a scissor when used, we call it a "scissor protractor".