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New 6-chip LED is brighter than a 20W halogen lamp A new Ostar LED module from Osram has four or six series-connected chips in a hexagonal shape that allows for high packing densities. Producing 420 lumens at an operating current of 700mA, the six-chip version with an in-built lens is brighter than a 20W low-voltage halogen lamp. LEDs are therefore now suitable for use in more and more general lighting applications. For example, they can provide enough light now for a desk lamp or a pocket video projector such as the new models from Samsung and Toshiba. A specially developed hemispherical lens is part of the standard equipment. This lens improves the efficiency with which light is emitted without affecting the beam characteristics. Basic versions without lenses are available for customerspecific optics. Six-chip versions of these high-output LEDs produce At an operating current of 700 mA, the hexagonal OSTAR Lighting LED module with six chips and a lens provides 420 lumens, opening up even more applications in general lighting. Photo: Osram Looking for real performance? 160 PAGES 23 CHAPTE RS Completely NEW projects – the result of two years research & development • Learn how engine management systems work • Build projects to control nitrous, fuel injection and turbo boost systems • Switch devices on and off on the basis of signal frequency, temperature and voltage • Build test instruments to check fuel injector duty cycle, fuel mixtures and brake & temperature Mail order prices: Aust. $A22.50 (incl. GST & P&P); Overseas $A26.00 via airmail. Order by phoning (02) 9979 5644 & quoting your credit card number and expiry date. Or fax the details to (02) 9979 6503; or mail your order with cheque or credit card details to Silicon Chip Publications, PO Box 139, Collaroy, NSW 2097. siliconchip.com.au 420 lumens with a lens and 300 lumen without a lens, at an operating current of 700mA and an output of 15W. The four-chip version produces 280 lumens with the lens and 200 lumens without the lens, at an operating current of 700mA and an output of 10W. The OSTAR LED has such a high output thanks to its thinfilm technology which ensures that all the light produced internally is emitted at the top. The white light colour is constant from every viewing angle and comes from colour conversion based on the chip coating method. The yellow converter is located directly on the blue chip. With its high luminous intensity, the new OSTAR Lighting LED is ideal for a wide variety of applications in general lighting, including individual workplace lighting, reading lights and car interiors. It is also ideal as a rapid flashing light for effect lighting or stroboscopes because this mode of operation does not shorten its life. SC From the publishers of Intelligent turbo timer I SBN 095852294 - 4 9 780958 522946 $19.80 (inc GST) NZ $22.00 (inc GST) TURBO BOOST & nitrous fuel controllers How engine management works June 2006  13