Researchers at Binghamton University in the US have proposed a breakthrough approach to green wearable electronics. They have developed paper-based devices that use moisture from the environment to generate electricity. This eliminates the need for frequent charging or battery replacement.
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Is it possible to connect 2 cameras with one network cable?
A standard Ethernet cable (category 5e or 6) consists of 4 pairs of conductors (8 cores in total). Fast Ethernet (100 Mbps) transmission actually uses only two pairs, or four of the eight cores. Data is transmitted on cores 1, 2, 3, 6. The remaining two pairs are unused. In emergency situations, properly plugging the wires into the RJ-45 connectors will make it possible to connect two devices. Importantly, PoE power can also be provided on the same pins a...
Broadcasting your own advertising channel in DVB-T2 TV system.
Using an HDMI-DVB-T modulator is a very good way to introduce your own advertising channel into a TV system, especially in places where the DVB-T2 terrestrial TV system is used. You can use it to transmit your own signal (e.g., advertising signal) through regular antenna TV cables and receive it on standard TVs on the network. The HDMI-DVB-T modulator allows you to convert an HDMI signal (e.g. from a computer, media player) into a DVB-T digital signal, which can be transmitted through the build...
Hikvision IP cameras with hybrid illuminator.
Hikvision IP cameras that have the designation -LI in the model name have a hybrid illuminator (Smart Hybrid Light), which combines the advantages of white light and infrared illumination. Traditional cameras have an IR illuminator, which illuminates the scene and allows recording images at night, at the expense of color loss. ColorVu cameras, can record color images around the clock, but the use of white light illumination is not always expected. To meet these requirements Hikvision offers sma...
Frequent questions about selection of antennas for LTE and 5G.
Wireless Internet access services provided by mobile network operators are an increasingly popular access method chosen by subscribers. The growing popularity is due to falling prices and higher transmission speeds for the services offered. An absolute hit here are the LTE and 5G technologies enabling to achieve bandwidths similar to those offered by local ISPs. Below is a list of the most common queries about antenna selection is presented:...
Library new titles
- 2024-08-25
- Installation Components
One of the criteria for classification of TV systems in hotels is the programming to be distributed. The simplest systems may provide only free-to-air terrestrial TV broadcasts, whereas more advanced solutions will include satellite channels, also some premium ones (pay-TV). The content required by the owner/investor will depend on the categories of prospective hotel guests (foreign and thematic channels etc).
- 2024-07-17
- Some Theory
PoE (Power over Ethernet) is the name of a number of methods that allow for powering network devices through UTP/FTP cables. This way it is possible to power devices such as cameras, phones, switches, access points, etc.
- 2024-06-19
- Measurements
Measurement of DVB-T2 terrestrial television signals and DVB-S/S2 satellite television signals. The technique of measuring DVB-T2 terrestrial digital TV signals is not very different from DVB-T signal measurement.
- 2024-06-12
- HIKVISION
Archive library. The information contained therein may be outdated. HikCentral Professional is a complete platform designed to manage Hikvision-branded security systems.
- 2024-05-08
- Measurements
This article summarizes the knowledge for the installer who faces the task of verifying the correctness of a fiber optic system. The article describes in detail all aspects related to the idea and procedures of measurement by the transmission method.
- 2024-05-08
- Antennas & Connectors
The 5G network is the fifth generation of wireless (telecommunications) technology standards, which offers much faster data transfer speeds than earlier generations such as 3G or 4G.
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