English
Polski
Česky
Deutsch
Irish
Magyar
Português
Română
Slovenský
No. 36/2024 (November 4, 2024)
Breakthrough in printing active electronic components.
Researchers at MIT have developed a method to produce logic circuits that do not use semiconductors and can be printed using standard 3D printers. Using inexpensive, biodegradable materials and a conventional 3D printer, the new circuits are able to perform similar functions to today's semiconductor transistors.Researchers, while working on another project, discovered the unique properties of a polymer doped with copper nanoparticles. When a large current flows through the material, the resistance increases rapidly, but it returns to its original level when the flow stops. This makes it possible to create transistors that act like switches – a function that is typical of silicon and other semiconductors, not printed materials. These transistors are crucial in creating logic gates that perform basic computing operations. Although the performance of these devices is not yet on par with semiconductor transistors, the technology can find applications in basic control functions. The new approach is not intended to replace silicon technologies, but to expand 3D printing capabilities into new areas, which would help spread the technology and enable the creation of smart devices without the need for conventional manufacturing centers.
An electronic component printed on a 3D printer.
By developing solid-state logic gates capable of performing calculations, researchers hope to simplify the electronics manufacturing process. The traditional electronics manufacturing process requires sterile conditions and advanced technology, available only in a few specialized manufacturing centers. The ability to 3D print fully functional electronic components without semiconductors could revolutionize electronics manufacturing and make it possible for companies, laboratories and even individual users around the world.
SMATV system in a brickhouse.
The manager of one of the brickhouses decided to upgrade the TV reception system. It was decided to remove individual TV antennas from the building and replace them with a SMATV system. Thanks to this solution, with the help of a single antenna set, residents will be able to enjoy free DVB-T2 digital TV and DVB-S/S2 satellite TV, as well as gain a more aesthetically pleasing appearance of the building, devoid of numerous antennas on the facade. The decision is aimed at both increasing the comfort of residents and bringing the building up to modern technical and visual standards. It was decided to use a solution based on TERRA brand devices. |  |  |
With the aid of the clamp OK-43T13 E8514, a 2-meter steel tower with a diameter of 50 mm E905121 was attached to the chimney. Then a set of TV antennas was mounted: DIPOL SMART HORIZON DVB-T2 A2230 and DIPOL-4/5-12 DAB DVB-T2 A0140, radio antenna Dipol 1RUZ PM B A0221, and satellite TRX-EL 100 FAMAVAL A9666 with quatro LNB A98257. A PA-420T R82516 channel amplifier was used to inject DVB-T2 signals into a multiswitch system based on TERRA's MR-908L R70808 multiswitch. The programmable PA420T channel amplifier from TERRA has been designed for amplification and equalization of DVB-T/T2 digital terrestrial TV signals in multi-family buildings, residences, hotels, boardinghouses, holiday homes, schools, hospitals, etc. The amplifier can be used in terrestrial TV systems (MATV), multiswitch systems (SMATV) or systems based on signal distribution from headends, modulators, etc.
Batch time synchronization in Hikvision devices.
The iVMS-4200 application allows batch synchronization in all devices that have been added to the application. Incorrect time setting can cause many problems. In the case of CCTV systems, it can make it difficult to determine the exact time of an incident, and in the case of video door entry systems it can cause problems with correct operation of tags according to a schedule. Synchronization can be done in a number of ways, such as when adding to an app or when directly logging into a device. For a batch update the time in iVMS-4200, after adding devices, go to: Menu → Tool → Batch Time Sync.
Batch time synchronization for Hikvision devices using iVMS-4200
High quality ULTIMODE pigtails.
The massive growth of the FTTH (Fiber To The Home) market is causing a significant increase in price competitiveness in the segment of passive components, such as adapters, pigtails and patchcords. Unfortunately, lowering prices often involves a reduction in product quality.For pigtails, we can divide quality parameters into those related to appearance and ease of processing and those related to transmission parameters. Dipol makes every effort to ensure that the ULTIMODE pigtails it offers are of high quality in each of these aspects. The characteristics of ULTIMODE pigtails include:
- Parameter control at the production stage – each pigtail is checked for attenuation and reflectance. Packaging of a single pigtail includes an information sticker with the declared parameters and their actual values measured before leaving the factory.
- High quality LS0H coating – ULTIMODE pigtails are made with halogen-free coating. In addition to the beneficial coating fire-resistance properties, such coating is characterized by easier installation in splice trays, switches, etc.
- The easy-strip coating allows you to peel the pigtail at any length practically in 1 second. This is extremely useful when the installer uses the 900 μm stripped fiber tray laying standard.
- Very good transmission performance proven by measurements taken after the installation.
 |  |
Real example of implementation of a system and measurement of a fiber optic link made with ULTIMODE L76008 cable and ULTIMODE G.652.D SC/APC L34252 pigtail. On the left, a photo of the sticker taken from the packaging of the pigtail. On the right, an OTDR measurement made with the UlTIMODE OR-20 L5830 tester. Attenuation of the event number 2 (connector: launch fibre – pigtail + splice) was 0.27 dB. The value meets the requirement of practically all company standards and norms used by operators (usually this attenuation should be less than 0.3 dB or even 0.5 dB). The OTDR did not register a reflection on the above-mentioned connection. This means that the value of reflection attenuation (RL – Return Loss) exceeded the device's sensitivity threshold, which, according to the manufacturer's data, is 70 dB. This remains in line with the declared parameters. Note that the connection occurring in the measurement was not cleaned. Measurement in the reverse direction showed similar values.
Fresnel zone.
The range of a wireless network depends on many factors. Some of them we can influence, while others are unknown. Fresnel zone is one of the most important concepts appearing in radio subjects you absolutely must be familiar with. It is the area actively involved in the transmission of radio signal energy. The shape of this area in longitudinal section is an ellipse, and in cross-section it is a circle. The radius of this circle varies along the length of the entire radio link and assumes a maximum value in the middle of the distance between the antennas. The first Fresnel zone is the most important, since it is in this zone that almost all the energy of the radio signal is transmitted.The cross-sectional radius of each Fresnel zone is largest in the center of the zone and decreases to the point of the antenna at each end. The maximum radius of the first Fresnel zone is often useful information. It occurs halfway between the transmitter and receiver.
Objects (hills, trees, buildings, etc.) located in Fresnel zones have a big impact on wave propagation (especially if they are in the first zone). The more of them and the larger they are, the worse the conditions for signal transmission. For links with improved operational reliability, the entire area of the first Fresnel zone should be free of obstructions.
In practice, ensuring the purity of 60% of the 1st Fresnel zone guarantees minimal power loss.
Correctly set up link – visibility of antennas and absence of obstacles in the first Fresnel zone.
 | The Pulsar PSD12010 (12 V, 1 A, desktop) M18101 power supply is designed for use with devices powered by 12 VDC and maximum current consumption of 1 A. It is equipped with an LED that indicates correct operation. The power supply has short-circuit and overload protection. | |
 | Sunell ZS02 monitoring kit (4 x SN-IPR8140HCBN-B, SN-NVR3804E1-J (III), ST1000VX013 , ULTIPOWER 0054af) The K1602 provides excellent representation of the monitored scene and enables video recording at up to 4 MP resolution. The cameras use advanced algorithms to distinguish between real threats, such as people or vehicles, and harmless phenomena, such as the movement of leaves or shadows. This significantly reduces the number of false alarms, minimizing unnecessary notifications. Recordings stored on the DVR are easily searchable, making it easy to quickly find incidents involving people or vehicles. | |
 | FGZ connector for micro-tube 12/8 mm E60815 for the purpose of connecting micro-tubes with an outer diameter of 12 mm and inner diameter of 8 mm E60812. The product is designed for outdoor and underground use – it is weatherproof and gas tight. Resistance to pressure of 18 bar. The fitting can be a component that connects microtubes directly in the ground. | |
Worth reading
Can G.652.D optical fibers be spliced with G.657.A1/A2 fibers? In fiber optic installation technology, there can be cables containing fibers in different standards. In LAN, CCTV, automation or FTTH systems one encounters fibers in G.652.D, G.657.A1 or G.657.A2 standard. The G.652.D standard has been used in telecommunications for more than 20 years. The G.657.A fiber group, due to its greater mechanical capabilities (smaller minimum bending radius), was originally intended to be used for last mile sections in FTTH networks. The popularity of cables with these fibers means that today these fibers can be found in almost every system. Installers often ask whether it is permissible to combine (splice) fibers manufactured in different standards...>>>more
SIGNAL T2-MINI digital television at your fingertips
