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Search results: 142   Output: 31-40
  1. Tai-Shan Liao, National Applied Research Laboratories, Instrument Technology Research Center, Hsinchu, Taiwan EDN An excessive level of light from a laser pointer, even if only for a short duration, can be harmful if it enters the human eye either ...
  2. Design 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 the PWM rate. Effective minimum duty factor is about 10% being limited ...
    Circuits » Supply · Light · Application Notes » ON Semiconductor » NCL30051, NCS1002, NCL30051LEDGEVB
  3. Design 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 24 to 200 V. ...
    Circuits » Supply · Light · Application Notes » ON Semiconductor » NCP1075, NCP4328A
  4. Marian Stofka EDN Battery-operated equipment often will benefit from a power-on indicator. The indicator, however, can waste significant power. In situations where a low-duty-cycle blinking indicator provides an adequate indication of the power ...
  5. Raju 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 almost no power ( Reference 1 ). However, you cannot adjust that configuration to switch at the ...
  6. Nora Jacalan Esteves, Technor Semiconductor LLC EDN With only a few additional components, you can use a highly efficient step-down dc/dc converter to create a constant-current, multiple-channel LED driver. It is relatively easy to drive a ...
  7. This shield allows to connect an Arduino with DMX equipment (Figure 1). It implements the RS485 interface to adapt the electrical levels needed for DMX connection. This shield has been designed with flexibility in mind and allows the user to choose ...
  8. Abel Raynus, Armatron International Inc, Malden MA There are many approaches to the problem of activating a light when it becomes dark, and a recent Design Idea covers this topic (Reference 1). Some approaches require a dc power supply and an ...
  9. Mincior Vicentiu, Braila, Romania. Inside the case of a regular wall charger with a 500mA transformer I’ve built a source in commutation for powering 10W LEDs by using a TOP242 integrated circuit in the primary part and the LM393 dual ...
  10. This experiment shows how to turn LEDs into light sensors. Since the Blinkenlight Shield has 20 of them this turns the Blinkenlight Shield into a 20 pixel „camera“. Schematics Before I explain why the schematics got their current form ...

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