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  • Teccor Thyristors for Ignition of Fluorescent Lamps (.pdf)
    is a U-shaped bimetallic strip and a fixed post. When the line input current is applied, the voltage between the bimetallic strip and the fixed post is high enough to ionize and produce a glow similar to a standard neon lamp. The heat from the ionization causes the bimetallic strip to move and make
  • Dimming AC Incandescent Lamps Using A PIC10F200
    the current flow in the filament. However, because it was essentially a current limiting resistor, it typically dissipated a lot of heat, especially in the middle of its range. So the search was on for a more efficient method of dimming.
  • Predicting Maximum Field Service Temperatures From Solar Reflectance Measurements of Vinyl
    A number of vinyl building product manufacturers are familiar with The Standard Test Method for Predicting Heat Buildup in PVC Building Products according to ASTM D 4803 which utilizes an insulated box to house a specimen irradiated by an IR heat lamp. Many vinyl producers may not be familiar
  • Predicting Maximum Field Service Temperatures From Solar Reflectance Measurements of Vinyl
    A number of vinyl building product manufacturers are familiar with The Standard Test Method for Predicting Heat Buildup in PVC Building Products according to ASTM D 4803 which utilizes an insulated box to house a specimen irradiated by an IR heat lamp. Many vinyl producers may not be familiar
  • Recent Advances in Pulsed Thermography
    very severe near-surface defects using a simple excitation setup (e.g., a heat gun or heat lamps and an IR camera), deeper or more subtle features are not detectable in the raw IR camera image. In such cases, the entire sequence of images captured during or after thermal excitation must be analyzed
  • Infrared Basics
    required rapid heating rates, precise control, and the ability to turn the heat on and off instantly. The same benefits also apply in plastics processing, as noted below: Quartz halogen lamps are similar to the incandescent lamps used in everyday lighting applications. The similarities include
  • Indicators
    be as high as 12 times normal operating current and can last 20 to 40 msec. At high frequencies, on the other hand, light filaments cool little between flashes and resistance stays high, causing much lower inrush currents. Filament heat capacity determines the decay rate of inrush current.
  • Low-power backlighting
    and need no light pipes or compensated graphics. They also don't generate much heat and won't burn out. The retrofitting of EL into an instrument cluster requires no major changes to other components. But there are important benefits, such as size and weight reduction if the cluster is designed
  • Green Technology: How to power an energy-efficient light
    the tube gas by applying a high voltage to heat the filaments. The ballast also serves as a current limiter when the lamp is on. The problem with old-style ballasts was one of both bulk and inefficiency. CFLs only took off with the advent of electronic-ballast circuits that were both economical

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