.. Landoni, open-electronics.org Since when white light emitting high brightness LED are available, the handover from traditional lighting bulbs to the solid-state lighting has become irreversible: ...
.. 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. ...
.. 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 ...
.. 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 ...
.. (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 ...
.. 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 ...
.. 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, ...
.. 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 ...
.. 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 ...
.. 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 ...