LED circuit - Wikipedia
LED Resistor Calculation – Mohan's electronics blog
Three LEDs in a Series Circuit – yeprite
LED Series Resistor Calculator | DigiKey Electronics
Ohm's law - LED resistor calculation | LEDnique
How to calculate the series resistor for an LED – Stompville
2 LEDs in series with resistor at 3.3V won't light up, one LED works - Electrical Engineering Stack Exchange
When and Why do LEDs Need Current Limiting Resistors? | Waveform Lighting
Resistors for LED Circuits | Resistor Applications | Resistor Guide
Resistance' of an LED | LEDnique
Parallel and Series Led Resistor Calculator – Electronics Projects Circuits
LED array wizard
Easy LED Current Limiting Resistor Calculator In 3 Steps
Resistors for LED Circuits | Resistor Applications | Resistor Guide
Guide to LEDs and resistors
LED Series Resistor Calculator | DigiKey Electronics
resistance - Why is the series resistor getting hot in this LED driving circuit? - Electrical Engineering Stack Exchange
LED Resistor Calculator - Electrical Engineering & Electronics Tools
How To Calculate and Connect LEDs in Series and Parallel - Homemade Circuit Projects
