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EETE JUN 2014

Integrated IoT wireless controller features low power A fully integrated wireless controller suitable for remote, battery powered sensor systems, which can offer current consumption as low as 32 μA is available from LPRS The low cost, high security easyRadio Integrated Controller (eRIC) offers designers seven power saving modes of operation to ensure maximum battery life of remote sensors. The eRIC transceiver power saving modes provide control of the duty cycle of the receiver so that the ‘ON’ time can be set to 12.5%, 6.25%, 3.1% , 1.56%, 0.78%, 0.39% & 0.2% with corresponding levels of power saving from its “always on” current of 16 mA. The transmitter may then be independently set to the same duty cycle as the receiver or longer as required for transfer of data. Up to 250 Byte data-packets are supported throughout all operating modes and up to 500 Kbs over air data rates are available. Measuring 20x15x5mm, the LPRS eRIC module is now available with operating frequencies for world markets and provides secure over-air transmission with the availability of an AES 128 bit data encryption option. Many other advanced features are available as standard including; received signal strength indicator (RSSI), carrier detect and group ID. The advanced design of this transceiver uses system-on-chip (SOC) technology removing the need for an external processor. Low Power Radio www.lprs.co.uk App calculates voltage drop between LED drivers and fixtures Integrated System Technologies (IST) Ltd is launching the company’s first ever app for Android mobile phones and tablets which is capable of calculating the voltage drop between an LED lighting fixture and an LED driver. The Dr Voltz app can be used to calculate the voltage drop depending on the length of cable which links the LED lighting fixture and an LED driver, as well as a number of other critical installation factors. Dr Voltz aims to simplify calculating the voltage drop for either constant voltage or constant current LED applications and assists in planning cable runs, cable specifications and LED system parameters to avoid potential onsite LED installation issues. By downloading the free app from Google Play and entering a series of data values into the Standard Calculator, including the cable diameter, fixture voltage, distance from the fixture to the LED driver and the forward current of the LEDs, the app calculates a voltage drop value for a specific cable length. In addition, the user is also provided with a value at which the driver voltage should be set, in addition to a simple graph demonstrating voltage drop along the length of the cable. Dr Voltz provides quick, accurate voltage drop calculations and an automatic warning when the LED forward current exceeds the rated cable forward current. Integrated System Technologies (IST) Ltd www.istl.com Wide format LCD module features high-brighness LED backlight NLT Technologies (NLT), together with its sales and marketing channels in Europe, Renesas Electronics Europe GmbH, has introduced 15.6 inch wide WXGA amorphous-silicon thin-film-transistor (TFT) liquid crystal display (LCD) modules that are equipped with long-life white LED backlight units. The wide format TFT LCD module, which is ideal for use in outdoor applications such as boating equipment or construction devices and for use in industrial display applications, are equipped with long-life white LED backlight units that achieve high luminance and also contribute to lower maintenance costs for equipment and reduced environmental impact. The 15.6 inch module has a luminance of 1100cd/m2 and high contrast ratio of 900:1 resulting in excellent viewability even in high ambient light environments. The displays are ideal for display applications in outdoor environments. The long-life, 70,000 hours, LED backlight is used in the new 15.6 inch module. This results in easy, low cost maintenance for these displays. Adoption of the white LED backlight also results in lower environmental impact since the backlights consume limited power and are mercury free. The operating temperature ranges from -20 to +70 degrees C. NLT Technologies (NLT) www.nlt-technologies.co.jp Gold-plated bondable resistors optimize heat dissipation Isabellenhütte has introduced the PMH-D and PLU precision performance foil resistors which are produced by using the Isa-Plan process which creates a temperature-resistant bonded combination of substrate and resistant foil that ensures optimal dissipation of heat. The Isa-Plan process uses pressure bonding to combine three layers of manganin foil, copper substrate with an adhesive to provide good thermal conductivity. A small increase in the temperature of the component has a positive effect on stability and longterm drift. Both resistors are well suited to applications in the automotive sector in which there are requirements in terms of high temperature and load. The devices meet the international AEC-Q200 specifications. The PMH-D and PLU can also be used in industrial applications such as frequency converters and power modules with DCB ceramic substrates. The PMH-D (6.7x3.4x0.7mm) and the PLU (10.4x6.4x0.6mm) are designed for hybrid mounting with bonding technology. The bonding pads and the back side of the component are plated with a 0.1 μm layer of gold which makes soldering and mounting with conductive adhesive viable. The resistors are designed to handle a constant load of up to 5 W at 150°C and a constant current of up to 50 A (PMH-D / size 2512) and 70 A (PLU / size 3924). The PMH-D is currently available as a 2-mOhm resistor and the PLU as a 1-mOhm resistor. Both resistors are designed as four-wire measurement resistors (Kelvin connection). Isabellenhütte www.isabellenhuette.de 60 Electronic Engineering Times Europe June 2014 www.electronics-eetimes.com


EETE JUN 2014
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