Circuits & Schematics Light: led - 7

61. Solar "Day Lamp" Also Powers FM Receiver
    Circuits Supply Radio Light Solar ON Semiconductor MC34063
    .. at 1 W each, and has series resistance of 22 Ω and power rating of 2 W (R1 and R2) to control the current into its LED string. Figure 1. The solar day-lamp schematic shows two identical strings of LEDs, each fed by a basic current ...
    14-12-2016

62. 60V Buck-Boost LED Driver with Up to 98% Efficiency Has Internal PWM Dimming and Spread Spectrum
    Circuits Supply Light Linear Technology LT8391
    .. the next generation of buck-boost converters masters these challenges and more. The LT8391 60 V four-switch buck-boost LED driver is designed to drive high power LEDs up to 250 W and to flawlessly transition between two-switch boost, ...
    18-10-2016

63. 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 LED's light ...
    28-06-2016
64. μModule LED Driver Integrates All Circuitry, Including the Inductor, in a Surface Mount Package
    Circuits Light Power Linear Technology LTM8040
    .. Note 445 Introduction Once relegated to the hinterlands of low cost indicator lights, the LED is again in the spotlight of the lighting world. LED lighting is now ubiquitous, from car headlights to USB-powered ...
    28-06-2016
65. Simplified white-LED flasher operates from one cell
    Circuits Supply Light Fairchild NC7SV57
    .. white-LED flasher in Figure 1 offers an alternative approach to a previously published idea ( Reference 1 ). Targeting use in ...
    23-06-2016
66. A Low-cost 0.5 A 33 V LED driver module with 90+% efficiency
    Circuits Light Power Taiwan Semiconductor TS19376CY5
    .. from 0.1 to 0.5 A. This article outlines the schematic, design guidelines, operation, and performance of the low cost LED driver. Short description LED driver module (Fig. 1) is built on buck driver IC TS19376CY5 in a SOT89-5 package. ...
    26-02-2016
67. Flyback switcher works down to 1.1V, flashes HBLEDs
    Circuits Supply Light EPCOS TN33/20/11-2P80
    .. mode (15 µA@32 kHz). With no modification, the circuit will work as a strobe, and flash a string of LEDs or a power LED at rates from 0.1 Hz to 20 Hz. It might seem a lot of circuitry for otherwise “simple” tasks, but it is ...
    31-01-2016
68. Protect an LED driver against output shorts to ground
    Circuits Supply Light Power Texas Instruments INA201 TPS40211
    .. Rice, Texas Instruments LEDs Magazine The non-synchronous, boost, power-conversion topology is often used in LED drivers in instances where the input voltage (VIN) is insufficient to forward bias a series/parallel set of LED ...
    23-11-2015
69. LED strobe has independent delay and duration
    Circuits Automotive Measurement Light NE555
    .. The circuit in Figure 1 shows the main-clock input; the delay and duration potentiometers, P 1 and P 2 ; and the HB-LED output. The circuit also includes an onboard general-purpose LED for bench testing to indicate an input signal, ...
    04-11-2015
70. The perfect Remote, Programmable, Controller for interactive LED strips. Part 2 - Controller Configuration, Connections and Operation
    Circuits Wireless Microcontrollers Usage Light
    .. control, either UP or DOWN, allows to turn off or turn on the respective output based on the current brightness: so if the LED strip is turned on, by pressing one of two buttons of the channel, the strip itself turns off and pressing it ...
    30-10-2015

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