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Search results: 156   Output: 1-10
  1. Hua (Walker) Bai Electronic Design LED applications are booming: backlighting for LCD TVs, projectors, and computer displays, camera flashes, and vehicle brake lights and taillights are just a few. All require constant-current LED drivers that ...
  2. Luca Bruno EDN A common method for driving multiple power LEDs is through two parallel strings. This inexpensive and less critical driver circuit can provide a lower voltage. However, the driver circuit must deliver twice the current of other ...
  3. Peter Demchenko EDN This Design Idea circuit regulates the current through one or more LEDs, making it almost independent of supply voltage. Its main advantage is a very small dropout voltage, which can be less than 100 mV. The design could find ...
  4. Dennis Eichenberg EDN The circuit in Figure 1 represents a simple and inexpensive way to provide additional bicycling safety. A conventional bicycle-generator lighting system works with the circuit to provide safety lighting for several minutes ...
  5. Eliot Johnston EDN Keeping low-voltage outdoor lights illuminated takes some effort. Bulbs burn out, and connections corrode. HB LEDs (high-brightness light-emitting diodes) seem like acceptable replacements, but most are available only in ...
    Circuits » Supply · Light » Cree » C535A-WJN
  6. T A Babu EDN High-power LEDs challenge electronics engineers to design accurate and efficient, yet simple, driver circuits. Conventionally, driving high-power strings with accurate current requires dedicated switching regulators. Choosing a ...
  7. Tom Gay EDN Most current microcontrollers offer I/O ports that can change their functions during program execution. As outputs, the circuits can sink and source reasonably large amounts of current. This Design Idea shows three alternative methods ...
  8. Robert H. Russell Electronic Design I needed a simple LED indicator showing that a particular voltage level had been reached specifically, that a capacitor had charged to a particular potential. I was convinced that there must be a way that a ...
  9. Sundaresan Sundararaj Electronic Design This idea describes a white-LED (WLED) driver circuit controlled by a simple ambient light sensor (ALS). A typical application would be a brightness control for cell-phone backlighting. On a very sunny day, ...
  10. Stephan Goldstein, Analog Devices EDN The human eye's highly nonlinear response to light levels poses problems for designers of adjustable lighting. Simple hardware or software linear-control methods compress most of the apparent intensity ...
    Circuits » Analogue Design · Light » Analog Devices » AD589, AD8031
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