infrared technology. Schemes, articles of the Free Technical Library

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infrared technology. Schemes, articles, descriptions

Free library / Schemes of radio-electronic and electrical devices

infrared technology

We recommend reading in our Free Technical Library:

Multiband vertical antenna

HF Antenna Section. The proposed vertical antenna (Fig. 1) was developed as a compromise that provides satisfactory performance on all major amateur HF bands. The vibrator of the universal antenna is made of aluminum pipes with a diameter of 40...50 mm. In its upper part there is a stopper filter tuned to the middle frequency of the 40 MHz range (7,05 MHz). In the range of 80 m, the filter has an inductive reactance and extends the vibrator to an electrical length of L/4. In the range of 40 m, the plug filter turns off the upper part of the vibrator, as a result of which the electrical length of the antenna is also equal to its L/4. In the range of 20 m, the filter resistance has a capacitive character and its length becomes equal to 3L/4 ... >>

Security system Lock GSM

Section Security and alarm via mobile communication. The LOCK GSM security system (hereinafter - OS) is designed to protect various stationary objects from unauthorized access. The OS has two protection zones, which can be used both for security functions and for fire alarms. Both zones operate independently of each other. As sensors for security and fire alarms, sensors should be used that, in the armed mode, have a resistance close to zero and an infinitely large resistance when triggered, for example, infrared motion sensors. A 1 kΩ resistor is connected in series with the sensor. The voltage to power the sensors is taken directly from the OS. It is possible to connect two sensors of the same zone in a serial circuit, while the resistance of the resistors of each sensor must be 510 Ohm ... >>

Two antennas on one cable

Section Television. Often in practice there is a problem of combining two antennas of different channels on one feeder. To do this, you can apply the typical scheme shown in Fig.1. Coils L1 ... L5 can be wound with enameled wire with a diameter of 0,5 ... 0,6 mm on one frame, turn to turn. In this case, it should be taken into account that the distance between the ends of adjacent coils must be at least 8 mm. Frameless winding can also be used ... >>

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Articles on infrared technology

Articles on infrared technology; diagrams of infrared technology; descriptions of infrared technology: 46 articles

Latest news of science and technology, new electronics:

Artificial leather for touch emulation 15.04.2024

In a modern technology world where distance is becoming increasingly commonplace, maintaining connection and a sense of closeness is important. Recent developments in artificial skin by German scientists from Saarland University represent a new era in virtual interactions. German researchers from Saarland University have developed ultra-thin films that can transmit the sensation of touch over a distance. This cutting-edge technology provides new opportunities for virtual communication, especially for those who find themselves far from their loved ones. The ultra-thin films developed by the researchers, just 50 micrometers thick, can be integrated into textiles and worn like a second skin. These films act as sensors that recognize tactile signals from mom or dad, and as actuators that transmit these movements to the baby. Parents' touch to the fabric activates sensors that react to pressure and deform the ultra-thin film. This ... >>

Petgugu Global cat litter 15.04.2024

Taking care of pets can often be a challenge, especially when it comes to keeping your home clean. A new interesting solution from the Petgugu Global startup has been presented, which will make life easier for cat owners and help them keep their home perfectly clean and tidy. Startup Petgugu Global has unveiled a unique cat toilet that can automatically flush feces, keeping your home clean and fresh. This innovative device is equipped with various smart sensors that monitor your pet's toilet activity and activate to automatically clean after use. The device connects to the sewer system and ensures efficient waste removal without the need for intervention from the owner. Additionally, the toilet has a large flushable storage capacity, making it ideal for multi-cat households. The Petgugu cat litter bowl is designed for use with water-soluble litters and offers a range of additional ... >>

The attractiveness of caring men 14.04.2024

The stereotype that women prefer "bad boys" has long been widespread. However, recent research conducted by British scientists from Monash University offers a new perspective on this issue. They looked at how women responded to men's emotional responsibility and willingness to help others. The study's findings could change our understanding of what makes men attractive to women. A study conducted by scientists from Monash University leads to new findings about men's attractiveness to women. In the experiment, women were shown photographs of men with brief stories about their behavior in various situations, including their reaction to an encounter with a homeless person. Some of the men ignored the homeless man, while others helped him, such as buying him food. A study found that men who showed empathy and kindness were more attractive to women compared to men who showed empathy and kindness. ... >>

Random news from the Archive

Cooling servers with a dielectric liquid 16.04.2014

The method of cooling the electronic components of a computer by immersion in a coolant was invented a long time ago. But just today, low-cost solutions that allow cooling server components without the use of water and electricity are becoming very relevant.

Despite the increase in energy efficiency, the power consumed by individual servers is also growing every year. Intel, for example, two years ago reported on experiments to dip Xeon processors into oil, which showed a reduction in consumption in the complex by 50-60%. The next experiments give hope that it will be possible to achieve a reduction in system power consumption by 90% or more.

Intel has created a system with SGI called Ice X. In fact, this is a full-fledged server running on Intel Xeon processors, completely immersed in the so-called "dry liquid" Novec manufactured by 3M. This liquid is non-conductive, so that electronic components can work in it without the risk of contact oxidation or short circuits.

True, this liquid also has disadvantages: it does not allow optical communication lines to fully operate, since it gets into insufficiently sealed connectors, worsening, as a result, the quality of data transmission. Therefore, we still have to work in this direction, creating, among other things, a new design of motherboards that takes into account the use of new environments.

However, 3M Novec fluid has been used in real conditions in fire extinguishing systems for several years, so its production is debugged, and its behavior is quite well known.

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