Circuits & Schematics Light: led - 9

81. Adjust power-efficient LED switch to any light intensity
    Circuits Automation Light
    .. 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

82. Three-channel white-LED driver uses simple step-down dc/dc converter
    Circuits Light Power
    .. 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 single-channel LED; however, it becomes more complicated when driving ...
    21-03-2013

83. TOP242 power source for 10W LEDs
    Circuits Analogue Design Supply Light
    .. So let’s connect the load. So, from Rv1 we obtain a constant output voltage Vout. If we put a load at output (the 10W led) on R18 rezistor a voltage will drop. Part of that voltage will be applied through Rv2 and R20 on input 6. R18 ...
    19-12-2012
84. LED Camera
    Circuits MCU Open-Source Platforms Microcontrollers Usage Light Arduino
    .. are two reasons for this. If you look at the board layout you will see that this layout allows to either place SMD leds or LED stripes. So if I wanted to place some LED stripe with a common anode then I would need this setup. The other reason ...
    06-04-2012
85. Control your holiday lights with a magic wand
    Circuits Beginners Light
    .. by IC2-2, IC3-1, and IC3-2. The output drivers Q1, Q2, and Q3 will be opened by high outputs of the binary counter. The LED’s chains will sequence in a binary counting mode. You can adjust the counting frequency by changing the ...
    19-12-2011
86. An LED's intrinsic capacitance works in a 650-mV LRC circuit
    Circuits Light Power
    .. Haidar, Canada The LED and a discrete inductor form an LC tank circuit You can use the inherent capacitance of an LED to make a series ...
    30-11-2011
87. Arduino expansion board used for controlling large numbers of LEDs
    Circuits MCU Open-Source Platforms Light Arduino
    .. board) used for controlling large numbers of LEDs. The Voxel Shield can drive up to 512 LEDs, making it possible to make an LED cube up to 8x8x8 voxels, or an LED screen of 64×8 pixels. Summary: Shift registers used: M74HC595B1R Shift ...
    01-11-2011
88. Driver circuit lights architectural and interior LEDs
    Circuits Supply Light Power ON Semiconductor NSI45020AT1G
    .. maximum. Traditional power supplies have accurate voltage outputs with variations in current. A resistor in series with an LED string controls the current. Such a design assumes a known voltage across the LEDs that does not vary with changes ...
    23-08-2011
89. Super Flux RGB LED Controller
    Circuits Microcontrollers Usage Light
    .. Pereira Introduction In this project it was used the Piranha Super-flux RGB LED of common anode, and the PIC18F25K20 , in order to generate combinations of colors. It has two function modes, ...
    07-07-2011
90. Offline supply drives LEDs
    Circuits Light Power
    .. drops during its cycle. The circuit in Figure 1 lets you use an inductor-less, switching, offline power supply as an LED driver for emergency-exit signs and neon-light replacements. The design uses off-the-shelf components, offers ...
    12-05-2011

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