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Search results: 149   Output: 1-10
  1. 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 ...
    17-04-2018
  2. 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, ...
    11-03-2018
  3. 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
    27-02-2018
  4. Al Dutcher EDN The circuit in Figure 1 allows you to light any type of LED from a single cell whose voltage ranges from 1 to 1.5 V. This range accommodates alkaline, carbon-zinc, NiCd, or NiMH single cells. The circuit's principal application ...
    29-01-2018
  5. Jim Grant EDN A white LED delivers a wide color spectrum and better visibility than do monochromatic LEDs. However, a white LED presents a higher forward-voltage drop than do its colorful counterparts and thus poses problems for operation from a ...
    23-01-2018
  6. Earlier portal Radiolocman has published a description of two devices for for automatic lighting of the working area in the kitchen: Arduino version and NodeMCU version . The latter, despite several disadvantages, which I will report at the end of ...
    Circuits » Automation · Wireless · Light · Arduino » ESP8266, PCA9685, DS18B20
    23-01-2018
  7. James Zannis EDN Expensive semiconductor laser diodes have no tolerance for fast voltage or current transients. To minimize the risk of damage, a standard JFET-clamp circuit shorts the laser when there is no supply voltage, thus protecting it ...
    14-09-2017
  8. T A Babu EDN The key features of this Design Idea are: Soft switch on/off operation Zero current drain in sleep mode Two level dimming Low battery protection Simple controller based on CMOS CD4017 Johnson counter The circuit is divided into two ...
    Circuits » Supply · Light » Texas Instruments » CD4017B, TL431
    10-08-2017
  9. Howard Myers EDN Since the LED's invention more than 40 years ago, its emission efficiency has steadily increased, and, although it may surprise you, the increased conversion efficiency works in two directions. Certain bright, efficient LEDs, ...
    Circuits » Light » Avago Technologies » HLMP-EG30-NR000
    05-07-2017
  10. Thomas Mosteller Electronic Design By using two basic power-supply topologies in conjunction, this circuit provides an easily controlled current source that is well-suited for dimming LEDs Many applications for LED illumination require wide dimming ...
    Circuits » Supply · Light » Linear Technology » LT3083, LT6015, LT8614, LTM8042
    21-06-2017
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