LED and resistor in series from +5V to digital in - General Electronics - Arduino Forum
Devon P. Hubner
How to use led Resistor value || 5v 9v 12v 24v 36v led || dc volt led Resistance | Electronics verma - YouTube
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LED 5V Red LED with series resistor e.g. for Arduino 5mm, 0,31 €
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Revisiting Resistors | All About LEDs | Adafruit Learning System
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How to select resistor value for LED with simple calculation (Ohm's Law) - YouTube
Guide to LEDs and resistors
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How to calculate resistor value for 20mA to protect LED from 5V for learning electronics shorts 103 - YouTube
LED Resistor Calculator
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L-7113ID-5V | Kingbright LED with resistor 627 nm Red T-1 3/4 6 V | Distrelec Switzerland
voltage - What resistor to use with this RGB LED? - Electrical Engineering Stack Exchange
L-7113ID-5V | KINGBRIGHT LED 5mm Resistor Red 617nm 40mcd/5V| 306071
10 x 12v 3mm LED Light Red Ultra Bright Internal Resistor 5v-15v 9v 6v 14v 7 no | eBay
