Scientists at the Daegu Gyeongbuk Institute of Science & Technology have developed a prototype betavoltaic battery that uses C-14 carbon, a radioactive isotope of carbon known as radiocarbon. This isotope only emits beta radiation. These compact and economical energy sources could provide a safe, long-lasting power supply for decades and eliminate the need for regular recharging. Radioactive carbon, a by-product of nuclear power plants, is cheap, readily available and recyclable. Furthermore, d...

Digital Video Broadcasting – Terrestrial (DVB-T) modulators are devices that convert audio-video signals from various HDMI-compatible sources (e.g. recorders, players, decoders, computers) into the DVB-T digital format used in digital terrestrial television. This allows the TV signal to be distributed via the existing antenna system without the need for additional cabling....

Installers often ask what tools to purchase when buying a fiber optic splicer. Several tools are offered with the splicer, including: a fiber stripper and a fiber break guillotine. However, this is not all. Buying several additional accessories is necessary, which can be divided into two groups: absolutely essential accessories and optional tools (the purchase of these is conditioned, among other things, by what kind of cables the installer will hav...

A twisted-pair cable is a type of signal cable used for data transmission in telecommunications systems and computer networks. Currently, it is most commonly used in analog telephony and Ethernet networks. It consists of one or more pairs of wires that are twisted together to reduce the impact of electromagnetic interference and crosstalk, i.e. interference between pairs of wires....

The IP Villa 2 gen. door stations from the DS-KV8xxx series have two independently triggered relays, which can be used to control a gate, for example. By default, the second relay in the door/gate station is off and should be activated with the iVMS-4200 app or via a web browser. Those outputs can be triggered using the iVMS-4200 PC client application, indoor stations or after shorting to ground (GND) of AIN4 (DOOR2 relay activation) and AIN3 (DOO...