LED circuits, theory, applications and tips

Various low-power LEDs.

LEDnique is a source of technical information, practical theory and tips related to LED lighting and indication applications. Topics include the LEDs, power supplies and control.

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0-10V 3-pin 5 x 7 matrix 7-segment 12V 14-segment 16-segment ac alphanumeric arduino auto backlight band gap battery bi-colour binned buffer bulb calculation camera car characteristics chart chassis colour connector constant-current CTR current current transfer ratio darlington datasheet decoder dimmable dimmer diode display DIY driver earth electrical eleven-segment failure filament flexible flicker Fluke fluorescent forward voltage GPIO ground high-side incandescent indicator infra-red infrared intro IV IV curve joiner latch LDR ldr gamma LED light-bulb light strip load-line loadline logic low-side LoZ luminous intensity metal-can mixing model multimeter. multiplex NPN Ohm's law opto-isolator opto-triac optocoupler packaging parallel photo-diode photocoupler pin-out pinout PNP power power-supplies protection diodes PSU PWM raspberry pi resistance resistor response time RGB seven-segment sneak-path spectrum speed stepper strip strip light T-size t-sizes test-equipment theory tool triac tube tv-remote valve; Vf voltage voltage-booster watts wavelength zero-cross

LEDs have advanced rapidly in the last decade and have now replacing incandescent and fluorescent lamps in domestic, industrial and automotive applications.

The site is intended to be a resource for anyone wanting to learn about or experiment with LEDs for hobby, professional, educational and domestic applications.

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