Menu English Ukrainian russian Home

Free technical library for hobbyists and professionals Free technical library


ENCYCLOPEDIA OF RADIO ELECTRONICS AND ELECTRICAL ENGINEERING
Free library / Schemes of radio-electronic and electrical devices

Switch-doubler from the usual. Encyclopedia of radio electronics and electrical engineering

Free technical library

Encyclopedia of radio electronics and electrical engineering / Lighting

Comments on the article Comments on the article

In order to turn on the light from two points, it is sometimes enough to modify the usual switch. It must be disassembled and a third contact plate installed. This is done quite simply.

After removing the switch housing, the screw holding the key and the contact plate is unscrewed. Now only the second contact plate remains on the base, fixed with a copper screw, symmetrically to which the switch has a ledge. In place of this protrusion, it is necessary to drill a hole with a diameter of 3,2 mm for the screw for attaching the additional contact.

And in the partition of the base - make a cut with a needle file. Of course, not "for beauty", but for additional contact. For fixing the most additional plate, it is desirable to use a copper screw.

Switch-understudy from the usual
Switch base with contact plates fixed on it: 1 - additional contact plate (1,5 mm copper or brass), 2 - switch base, 3 main contact plates, 4 - MZ screw (3 pcs.).

Switch-understudy from the usual
Scheme of connecting the load to the network

Author: P. Belousov

See other articles Section Lighting.

Read and write useful comments on this article.

<< Back

Latest news of science and technology, new electronics:

Machine for thinning flowers in gardens 02.05.2024

In modern agriculture, technological progress is developing aimed at increasing the efficiency of plant care processes. The innovative Florix flower thinning machine was presented in Italy, designed to optimize the harvesting stage. This tool is equipped with mobile arms, allowing it to be easily adapted to the needs of the garden. The operator can adjust the speed of the thin wires by controlling them from the tractor cab using a joystick. This approach significantly increases the efficiency of the flower thinning process, providing the possibility of individual adjustment to the specific conditions of the garden, as well as the variety and type of fruit grown in it. After testing the Florix machine for two years on various types of fruit, the results were very encouraging. Farmers such as Filiberto Montanari, who has used a Florix machine for several years, have reported a significant reduction in the time and labor required to thin flowers. ... >>

Advanced Infrared Microscope 02.05.2024

Microscopes play an important role in scientific research, allowing scientists to delve into structures and processes invisible to the eye. However, various microscopy methods have their limitations, and among them was the limitation of resolution when using the infrared range. But the latest achievements of Japanese researchers from the University of Tokyo open up new prospects for studying the microworld. Scientists from the University of Tokyo have unveiled a new microscope that will revolutionize the capabilities of infrared microscopy. This advanced instrument allows you to see the internal structures of living bacteria with amazing clarity on the nanometer scale. Typically, mid-infrared microscopes are limited by low resolution, but the latest development from Japanese researchers overcomes these limitations. According to scientists, the developed microscope allows creating images with a resolution of up to 120 nanometers, which is 30 times higher than the resolution of traditional microscopes. ... >>

Air trap for insects 01.05.2024

Agriculture is one of the key sectors of the economy, and pest control is an integral part of this process. A team of scientists from the Indian Council of Agricultural Research-Central Potato Research Institute (ICAR-CPRI), Shimla, has come up with an innovative solution to this problem - a wind-powered insect air trap. This device addresses the shortcomings of traditional pest control methods by providing real-time insect population data. The trap is powered entirely by wind energy, making it an environmentally friendly solution that requires no power. Its unique design allows monitoring of both harmful and beneficial insects, providing a complete overview of the population in any agricultural area. “By assessing target pests at the right time, we can take necessary measures to control both pests and diseases,” says Kapil ... >>

Random news from the Archive

Technique against pirates 18.12.2000

You are mistaken if you think that the pirates remained somewhere in the seventeenth century. In the waters of Southeast Asia, pirate attacks on cargo ships are now quite common. Over the past four years, the number of attacks on Japanese merchant ships has increased fivefold. And all over the world in 1999 there were more than three hundred cases of piracy. It got to the point that the team of the Japanese icebreaker "Sirase", which set off for Antarctica last fall, when passing through the most "pirate-dangerous" zones off the coast of Indonesia, tightly battened down and tied all the doors from the inside with ropes, and water cannons were placed on the deck to wash away those climbing on board of pirates.

The methods of the pirates have remained the same: the ship is boarded by throwing hooks with ropes or rope ladders on board.

In July of this year, 15 Japanese bulk carriers were equipped with a simple protection system. A wire connected to a tension sensor was stretched along the deck railing. When the hook breaks or pulls on the wire, an alarm sounds and powerful spotlights are turned on. But ships are equipped with more sophisticated anti-piracy devices.

An attack is automatically notified by satellite to the Coast Guard and the shipowner, one of which is about the size of a shoe box, and no one on the ship knows where the box is hidden so the pirates can't turn it off.

Other interesting news:

▪ Unexpected properties of yogurt

▪ TLP-T71U projector from Toshiba

▪ The dangers of 5G communications for the health of bees

▪ The world's first cyborg

▪ plastic muscles

News feed of science and technology, new electronics

 

Interesting materials of the Free Technical Library:

▪ section of the site Life of remarkable physicists. Article selection

▪ article AVerMedia DVD EZ Maker USB Plus. video art

▪ article How are oysters born? Detailed answer

▪ article Picker. Standard instruction on labor protection

▪ article Automatic disconnection of the amplifier from the network. Encyclopedia of radio electronics and electrical engineering

▪ article Converter for powering radios. Encyclopedia of radio electronics and electrical engineering

Leave your comment on this article:

Name:


Email (optional):


A comment:





All languages ​​of this page

Home page | Library | Articles | Website map | Site Reviews

www.diagram.com.ua

www.diagram.com.ua
2000-2024