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AX-SIGFOX - Ultra-Low Power, AT Command Controlled, Sigfox
AX-SIGFOX - Ultra-Low Power, AT Command Controlled, Sigfox

... The command AT$P=1 is used to put the AX−Sigfox into Sleep mode. In this mode, only the wakeup timer for out−of−band messages is still running. To wake the AX−Sigfox up from Sleep mode toggle the serial UARTRX pin, e.g. by sending a break (break is an RS232 framing violation, i.e. at least 10 bit du ...
Rainfall Monitoring Using Acoustic Sensors
Rainfall Monitoring Using Acoustic Sensors

Aalborg Universitet Converters
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... and one cannot decide which filter topology is best suited, if the application or target switching frequency of the VSC is different [34]. In addition, the amount of resonance damping attenuation and its impact on the dynamic performance of the current controllers and system stability are omitted. T ...
Design and Analysis of Comparators using 180nm CMOS Technology
Design and Analysis of Comparators using 180nm CMOS Technology

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A Class-E Inductive Powering Link with Backward Data

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Networking over Bluetooth: overview and issues
Networking over Bluetooth: overview and issues

... In the sniff mode, the slave listens for transmissions only at fixed intervals Tsniff, at the offset slot Dsniff for Nsniff times. These parameters are given by the LMP in the master when it issues the SNIFF command to the slave. ...
Design Considerations for Electrical Fast Transient (EFT)
Design Considerations for Electrical Fast Transient (EFT)

... repetitive fast transients and the necessary test methods for systems. The EFT waveform, as defined by the IEC 61000-4-4 standard, is intended to be used by manufacturers to test the performance of equipment when subjected to fast transients. Primarily, the testing involves injection of EFT pulses i ...
Aalborg Universitet Modulation Schemes With Enhanced Switch Thermal Distribution for Single-Phase
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... phase-leg. With two phase-legs, two upper ac terminals and two lower ac terminals are thus formed for connecting a source and a load. Moreover, with three switches per phase-leg, this second six-switch converter appears more like a full-bridge converter placed on top of another, rather than connecte ...
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... All Intel® desktop boards are evaluated as Information Technology Equipment (I.T.E.) for use in personal computers (PC) for installation in homes, offices, schools, computer rooms, and similar locations. The suitability of this product for other PC or embedded non-PC applications or other environmen ...
Low-Voltage Differential Signaling (LVDS)
Low-Voltage Differential Signaling (LVDS)

... LVDS requires only a simple termination resistor, which can be integrated onto the chip. This costs much less than using multiple resistor and capacitor components for each transmission line. In addition, LVDS requires no termination or Vddq voltage supply, a big cost savings over technologies such ...
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... More supported Cisco devices and non-Cisco devices, software versions, and device contents can be found in the latest version of the ANA Documentation Guide. For customers using Cisco IP NGN systems and network devices, ANA maintains the compatibility with those key device series such as CRS, ASR 90 ...
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... SMT -Surface Mount Technology 2.3.2 DEFINITIONS 2.3.2.1 Controlled Stock Room: 2.3.2.1.1 Temperature: The stock room is to be maintained at a temperature of 20°C ±10 °C. In addition, temperature variations of more that 10 °C are not permitted in any 24-hour period. Components that have been exposed ...
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... The Polytechnic of Namibia began moving to end-to-end Cisco solutions about 10 years ago when the previous vendor stopped providing support. When Maartens came on board about three years ago, he recognized the growing security threats and the need for increased scalability. He began moving the unive ...
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... Furthermore, project documentation shall include, but not be limited to: 1. All design calculations. 2. Licensing and permitting documentation. 3. Bill of materials for major equipment, structures, and electrical buswork. 4. Manufacturers drawings, instruction books, and test reports. 5. DC and AC ...
An Improved Microwave Weed Killer
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... transformers, a three-phase 400 V AC, 50 Hz supply was selected for the whole weed killer with 12 magnetrons. The three-phase power supply was actually an advantage, allowing a simple solution to turn on the individual magnetrons sequentially. The power supplies of adjacent magnetrons are simply con ...
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E-Flex™ - Square Deal

... Read these instructions carefully and look at the equipment to become familiar with the device before trying to install, operate, service, or maintain it. The following special messages may appear throughout this bulletin or on the equipment to warn of potential hazards or to call attention to infor ...
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experimental characterization regarding two types of
experimental characterization regarding two types of

... CCT can be noticed, compared to the other devices. This points to a very poorly constructed LED, with a very thin or inefficient phosphor coat to properly shift blue radiation to longer wavelengths, giving away light with a bluish aspect. This unidentified LED is one of the many that can be readily ...
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Power over Ethernet



Power over Ethernet or PoE describes any of several standardized or ad-hoc systems which pass electrical power along with data on Ethernet cabling. This allows a single cable to provide both data connection and electrical power to devices such as wireless access points or IP cameras. Unlike standards such as Universal Serial Bus which also power devices over the data cables, PoE allows long cable lengths. Power may be carried on the same conductors as the data, or it may be carried on dedicated conductors in the same cable.There are several common techniques for transmitting power over Ethernet cabling. Two of them have been standardized by IEEE 802.3. Since only two of the four pairs are needed for 10BASE-T or 100BASE-TX, power may be transmitted on the unused conductors of a cable. In the IEEE standards, this is referred to as Alternative B. Power may also be transmitted on the data conductors by applying a common-mode voltage to each pair. Because twisted-pair Ethernet uses differential signalling, this does not interfere with data transmission. The common mode voltage is easily extracted using the center tap of the standard Ethernet pulse transformer. This is similar to the phantom power technique commonly used for powering audio microphones. In the IEEE standards, this is referred to as Alternative A.In addition to standardizing existing practice for spare-pair and common-mode data pair power transmission, the IEEE PoE standards provide for signalling between the power sourcing equipment (PSE) and powered device (PD). This signaling allows the presence of a conformant device to be detected by the power source, and allows the device and source to negotiate the amount of power required or available. Up to a 25.5 watts is available for a device.
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