LED circuits 
related subjects:
Infrared sensors,
Infra red remote
control protocols, LED Technical
Information, Optics |
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10” LED
Backlight from a Single Cell Battery LED backlights have been used
extensively in small and medium size portable LCD displays – generally less than
3 inches. In many cases, these applications require two to four white LEDs
(WLEDs) in parallel,
pdf file |
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120
VAC LINE POWERED WHITE LEDs NOTE! USE 0.22uF @400V FOR 240 VAC POWER LINES
!!!! |
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13 Color LED Rainbow |
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1.5V LED flasher
1.5V LED flasher, 74AC14, pdf file |
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2
Transistor LED Flasher a classic 2 transistor astable multivibrator |
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9V LED flasher
9V LED flasher, 2 transistors |
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36-led flashlight
with switching power supply |
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555 LED flasher |
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3V LED flasher 3V LED flasher, 2 transistors |
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AC Line
powered LED This application note describes the basics for powering high
current light emitting diodes (LEDs) utilizing a capacitive divider circuit off
the ac mains, pdf file |
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AC Line
powered LEDs The circuit below illustrates powering a LED (or two) from the
120 volt AC line using a capacitor to drop the voltage and a small resistor to
limit the inrush current |
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AC-Powered LED |
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AC Powered
White LED Strings |
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Animated LED
Animated LED, PIC16C84, a 4x4 pixel animated LED billboard of the type commonly
seen at railway stations, in store windows and so on |
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Bicycle safety lights bicycle safety lights, 555 circuit, Flashing 13 LED
unit, 3V supply |
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Big 7-Seg LEDThe
circuit uses a serial-in-parallel out shift register, 74HC595 for receiving
serial data from uController board |
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Build your own simple
9-LED Flashlight- the basics With white LEDs getting down to about
$1.2USD, there's every reason to make your own flashlight. Whether you want a
small light with just one LED, or one with maybe 9 LEDs that is as bright as a
serious flashlight, or even to replace the car's dome light lamp bulb with
something that won't run your battery down, this info will get you started |
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Constant Current Buck
Regulator for High Power LED Drivers LM3404HV - 1.0A Constant Current Buck
Regulator for High Power LED Drivers |
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Constant Current LED
Driver pdf file |
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Constant Current LED
Driver constant current source led array, pdf file |
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Crossing light flashers
train, Crossing Light Flasher Circuits, Low Power Crossing Light Flashers |
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Dual Gate Inverter
Oscillator Increases the Brightness of LEDs While Reducing Power Consumption
pdf file |
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Flasher
low power LED flasher, LM3909 |
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Fun with LEDs LED Chasers,
Sequentially Off LED Pulser |
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Highly Efficient
0-100% LED Dimmer This webpage describes a highly efficient LED dimmer, or a
dimmable LED flashlight |
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High
Efficiency 12V White LED Driver |
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High-Power
LED Driver Accepts Wide Input-Voltage Range Circuit based on a buck/boost
converter controller regulates current to a white LED, despite an allowed
variation of input voltage from 2.7V to 16.5V,
pdf file |
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LED-BASED MESSAGE DISPLAY pdf file |
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LED circuits |
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LED Constant
Current Source Scheme LED Constant Current Source Scheme, LM317L |
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LED flasher |
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LED flasher
a project to flash a Light Emitting Diode (LED) |
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LED flasher circuits |
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LED dimmer
single FET controls LED array, pdf file |
| LED dimmer
LED dimmer circuit |
|
LED dimmer
LED dimmer circuit |
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LED dimmer uses only two lines provides 32 steps of brightness control—from 0 to 100%—for a backlight or instrument panel, using just two
general-purpose-microprocessor signals, MAX5160, pdf file |
|
LED driver for low
voltage halogen replacement ZXSC300, pdf file |
|
LED
Drivers for Display Backlighting and Other Portable Applications Series LED
Drive vs. Parallel LED Drive, Inductive Boost vs. Switched-Capacitor Boost for
the LED Drive Application, LED Drive Efficiency, pdf file |
|
LED flashlight LED flashlight circuit |
| LED lamp
dimmer LED lamp dimmer circuit |
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LED lamp
dimmer This circuit provides 32 steps of brightness control from 0 to 100%
for a backlight or instrument panel using just two general purpose
microprocessor signals |
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LED
Lighting LED Lighting, constant current source |
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LED Lighting
Semiconductors |
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LED-matrix oscilloscope |
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LeD MaTRiX
This is a simple, programmable, autonomous and extensible LED matrix with the
possibility of being controlled by a computer using a RS232 connection. Its
basic modules are the Controller Board, the I/O Port expander boards and the LED
matrix cardboard support. The micro controller is a common Microchip, PIC16F88 |
| LED modifications
a list of various modifications made to incandescent flashlights |
|
LED power
supply LED power supply - Single AA cell powers two LEDs at constant current |
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LED stroboscope design of a stroboscope circuit |
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Low battery
voltage flasher Low battery voltage flasher, PANASONIC MN13811-G, 2
transistors,
pdf file |
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Low
power LED Flasher 4 components, including 1.5V battery, LM3909 |
|
RGB LED
Fashion Lighting Controller controller for RGB LED fashion lighting,
pdf file |
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Simplest LED Flasher circuit |
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Single and Two Cell White LED Drivers Without Inductors Three inductor-free
circuits that allow a white LED or UV LED to be driven from one (1.5 volt) or
two flashlight cells (3 volts total), Pulse Boost White LED |
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SPI Interface Big
7-Seg LED The circuit uses a serial-in-parallel out shift register, 74HC595
for receiving serial data from uController board |
|
Three-Color Display
using Bicolor LEDs The circuit presented here uses bicolour LEDs to generate
a display in three colours, namely, red, green, and yellowish green |
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ULTRA-BRIGHT LED LAMP this ultra-bright white LED lamp works on 230V AC with
minimal power consumption. It can be used to illuminate VU meters, SWR meters,
..., These LEDs emit a 1000-6000mCd bright white light like welding arc and work
on 3 volts, 10 mA,
pdf file |
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White LED driver circuit
ZVN2106 MOSFET, pdf file |
|
White LED driver circuit step-up white LED driver circuit,
pdf file |
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White Led Flashlight - Modified Solar Flashlight |
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White LED Flashlight Schematic
LM334, gif file |
| White
LED voltage converter White LED voltage converter circuit |
|
White
LED voltage converter Three inductor-free circuits that allow a white LED or
UV LED to be driven from one (1.5 volt) or two flashlight cells (3 volts total)
are described |
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Last updated on:
2008-04-10
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