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Digital technology. Schemes, articles, descriptions

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Digital technology

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Shortwave Whip Antenna



HF Antenna Section. Description of the shortwave antenna IIIDX antenna operating on the bands 80, 40, 20 and 15 m published by the American shortwave W3JHR. The antenna is a vertical rod with a height of about 15 m without guys, the base of the mast is grounded. On fig. Figure 1 shows the directivity patterns in the vertical plane and the current distribution curves in the antenna on the ranges of 40 (Fig. 1, a), 80 m (Fig. 1, b) and 20 m (Fig. 1, c) ... >>

Economical voltage converter for powering varicaps, 6-9/20 volts



Section Voltage converters, rectifiers, inverters. When using varicaps in portable receivers powered by 6 ... 9 V sources, there is a need for a converter that steps up the voltage to about 20 V. Most of the voltage converters described on the pages of amateur radio magazines are not very suitable for use in portable receivers, since they require the use of step-up transformers and Zener diodes D814 with a minimum stabilization current of 3 mA, which complicates their manufacture and reduces efficiency. These shortcomings are not present in the converter, the circuit of which is shown in fig. 4.13. It does not contain winding parts, economical and easy to set up ... >>

Basic rules for using electricity



Electrical section. To obtain permission to turn on new electrical wiring in houses owned by individual citizens on the basis of personal property rights, in the buildings of gardening associations, garages for personal vehicles, a written application must be submitted to the power supply organization. The admission to the operation of electrical installations in new houses is given by the inspector of the state energy supervision. The supply of voltage to new electrical installations is carried out in the presence of an act of admission to their operation after the conclusion of an agreement for the use of electricity, verification and installation of an electric meter. The wiring is switched on under voltage within 5 days after inspection and its admission to operation ... >>

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Articles on digital technology

Articles on digital technology; schemes of digital technology; descriptions of digital technology: 54 articles

 


 

Latest news of science and technology, new electronics:

Using Apple Vision Pro during surgery 16.03.2024

The medical team at Cromwell Hospital in London used Apple Vision Pro for the first time during two spinal surgeries. This event confirms the headset's potential as a medical tool that will change the way surgical practice is performed. Although the doctors themselves did not use Vision Pro, the operating room nurse worked with virtual reality using glasses while preparing and performing procedures. The headset made it possible to view virtual screens in the operating room, select instruments and monitor the progress of the operation. Software developed by eXeX, a company that specializes in creating artificial intelligence-based applications for surgery, has significantly improved the patient care process. Using Apple Vision Pro opens up new opportunities for developing healthcare applications such as clinical education, surgical planning, training and medical imaging. Implementation of Apple Vision Pro in the medical industry ... >>

Carbon storage in the North Sea 16.03.2024

Norwegian Energy Minister Terje Åsland has announced the launch of the Longship project, which aims to create a central carbon dioxide storage facility in the North Sea. This ambitious project is valued at $2,6 billion and aims to apply CCS (carbon capture and storage) technology to mitigate the impact of climate change. Norway already has experience in CCS, thanks to the successful Sleipner and Snohvit projects, and is now looking to increase the amount of carbon sealed beneath the seabed. Longship's plan calls for capacity to capture and store 1,5 million tons of carbon annually over 25 years. Despite the positive outlook, there are concerns about the long-term consequences of such storage. However, proponents of the project argue that offshore carbon storage has a number of advantages, including minimal environmental impact. The Longship project is carried out with the participation of Equinor, Shell and TotalEnergies through the joint venture Northern Li ... >>

Mini-organs grown from human amniotic fluid 15.03.2024

An international team of scientists led by Professor Fan Xiulin from Zhejiang University has developed a unique method of growing mini-organs from cells found in human amniotic fluid. This significant medical breakthrough could lead to improved diagnosis and treatment of congenital diseases. The organoids, which are three-dimensional cellular structures that mimic organs on a smaller scale, were grown from lung, kidney and small intestine cells found in amniotic fluid. This method opens up new possibilities for studying various fetal conditions and may be the key to early diagnosis and treatment of birth defects. Although no treatment has yet been attempted, the scientists hope their research will help combat the serious congenital diseases that affect millions of newborns each year. This breakthrough could change medical interventions by making it possible to diagnose and treat congenital diseases. ... >>

Random news from the Archive

Smart surveillance camera with tracking function 25.12.2014

Amaryllo introduced Indiegogo the iCamPro FHD "intelligent" surveillance camera project with remote notification function.

The novelty is endowed with three motion sensors and a microphone, thanks to which it is able to detect the presence of an intruder anywhere in the room. When one of the sensors is triggered, iCamPro FHD automatically aims the lens at a moving object and starts tracking its movement. At the same time, a notification is sent to the smartphone of the owner of the dwelling.

The camera is equipped with two motors, due to which it can rotate 360 ​​degrees. You can mount iCamPro FHD on a wall or ceiling. In the second case, the image is automatically rotated by 180 degrees. By the way, the video is recorded in Full HD with a resolution of 1920 x 1080 pixels.

The developers of the device have provided a light sensor and hidden infrared LEDs: thanks to this, the camera can switch between day and night modes. An integrated speaker allows for two-way communication.
Data exchange with the user's mobile gadget is carried out through the home Wi-Fi network. The footage can be stored on a microSD card or transferred directly to the Google Drive cloud. A companion mobile app exists in both Android and iOS versions.

The project participants stated that the goal of the crowdfunding campaign was a symbolic amount of $1000. At the time of this writing, more than $160 has been raised, and funding will continue for about three more weeks. For now, iCamPro FHD can be reserved for $150.

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