Circuits & Schematics Light: colour color organ - 3

21. Super Flux RGB LED Controller
    Circuits Microcontrollers Usage Light
    .. and the PIC18F25K20 , in order to generate combinations of colors. It has two function modes, automatic that generate the color sequence that is stored in the uC memory, and the manual mode in which you can select one of the seven possible ...
    07-07-2011

22. An LED's intrinsic capacitance works in a 650-mV LRC circuit
    Circuits Light Power
    .. of an LED to make a series resonant boost circuit that can create a voltage large enough to light the LED. Depending on the color of the LED, you need a voltage higher than 1.6V to turn it on. The threshold, or knee, voltage rises higher as ...
    30-11-2011

23. The perfect Remote, Programmable, Controller for interactive LED strips. Part 1 - Specification and Schematic
    Circuits Wireless Microcontrollers Usage Light
    .. case you need a system which allows to vary the shade of the light emitted. Each LED, however, is made to give a certain color temperature and cannot be changed. Anyway there is a solution: use diodes both in warm and cold white, mixing ...
    29-09-2015
24. Optical feedback extends white LEDs' operating life
    Circuits Light Power Intersil ISL29000 EL7630
    .. Santos EDN Regardless of its color, an LED's light output varies as a function of forward current and ambient temperature. As Figure 1 shows, an ...
    28-06-2016
25. LED-String Driver Operates from Single Cell
    Circuits Supply Light
    .. adjustment of operating parameters by changing component values. This design describes how to light a string of LEDs of any color from a 1.5-V cell using just a few inexpensive components. The circuit (see Figure 1) forms a self-oscillating, ...
    11-04-2017
26. Simple single-cell white-LED driver uses improvised transformer
    Circuits Supply Light
    .. Grant EDN A white LED delivers a wide color spectrum and better visibility than do monochromatic LEDs. However, a white LED presents a higher ...
    23-01-2018
27. Single cell lights any LED
    Circuits Analogue Design Light
    .. energy into the LED during flyback. Figure 1. A simple circuit provides drive from a single cell to an LED of any type or color. Q 1 , an inverting amplifier, drives Q 2 , an inverting switch. R 4 , R 5 , and R 2 provide feedback around ...
    29-01-2018
28. Single-port pin drives dual LED
    Circuits Microcontrollers Usage Light Siemens BSS101
    .. and source reasonably large amounts of current. This Design Idea shows three alternative methods for driving a two-pin, two-color LED from a single I/O pin. Figure 1 illustrates one possible approach that uses external inverter IC 1 to drive ...
    23-05-2018
29. Use "Extra" LED Driver Channel To Provide Constant-Voltage Source
    Circuits Supply Light Linear Technology LT3476
    .. and employ the fourth channel as a constant-voltage source. The example system is an LCD projector that requires three color LED strings: red, blue, and green. Each string uses 1-A LEDs and is driven in a buck mode topology (see Figure ...
    27-11-2018
30. Buck regulator controls white LED with optical feedback
    Circuits Analogue Design Supply Light Texas Instruments LM2575 LM358
    .. EDN There is much interest in LED-based lighting due to the availability of high-power, high-efficiency white and other-color LEDs (Reference 1). Because an LED is a current-controlled device, typical control circuits regulate the ...
    15-02-2019

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