Circuits & Schematics Light: led - 4

Subsection: "Light"
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  Colour Organ   LEDs
Search results: 137 Output: 31-40
  1. .. employed in robotics and power electronics. This Design Idea is a novel implementation of this technique for driving white-LED arrays directly from the ac mains in full-wave current-limited mode to realize an excellent flicker-free, ...
    17-03-2014
  1. .. Baddi, Индия EDN You can use an LED as a photoelectric sensor. A previous Design Idea shows that such a switch is highly power-efficient, consuming ...
    23-07-2013
  1. .. here should prove useful. Figure 1. Q 1 and Q 2 function as a current source and push a constant current through the LED regardless of its forward voltage drop (within the compliant voltage limitations). The Schmitt inverter forms a ...
    21-08-2013
  2. .. Note DN05055/D October 2013 High voltage LEDs are becoming more popular and are now available from multiple LED manufacturers such as CREE and Philips-Lumileds. These package LEDs may have typical forward voltages ranging from ...
    17-11-2013
  3. .. project is pretty cool for a few reasons, and driving a huge LED matrix with a single 8-bit controller is just one of them. The idea was born when I bought 120 LEDs of the wrong ...
    29-05-2014
  4. .. (Walker) Bai, Linear Technology Design Note 508 Introduction The meaning of the term high power LED is rapidly evolving. Although a 350 mA LED could easily earn the stamp of high power a few years ago, it could not ...
    18-12-2014
  5. Circuits Supply Light Application Notes ON Semiconductor NCL30051 NCS1002 NCL30051LEDGEVB
    .. Note DN05034/D November 2013 The NCL30051LEDGEVB LED driver evaluation board provides PWM dimming capability via gating the resonant half bridge converter on and off at ...
    30-11-2013
  6. .. circuit uses a 6-V DC supply with a PWM current-source configuration to provide efficient, adjustable dimming of a white LED over a wide range, needed to accommodate the unique lighting needs of an optical microscope over its magnification ...
    02-01-2015
  7. .. of LEDs with a constant current over the entire worldwide range of AC-mains voltages. The resistor in series with the LED string provides a convenient point to measure LED current via its voltage drop. The concept presented here ...
    01-03-2015
  8. .. and powered from a 5 volt DC supply. Figure 1. Constant current drive circuit. With a 500 millivolt minimum above VF of the LED die, this circuit allows control over the individual RGB die currents with a range from around 100 mA up to 1 amp. ...
    18-03-2015

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