Circuits From Scratch | Let's Put LEDs in Things! | Adafruit Learning System
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Resistors for LED Circuits | Resistor Applications | Resistor Guide
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How to Calculate the Value of Resistor for LEDs Circuits?
LED Resistor Calculator
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Simple LED circuit with 9V battery – helloCircuits!
Choosing the Resistor to Use With LEDs : 3 Steps - Instructables
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Guide to LEDs and resistors
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How to Calculate the Value of Resistor for LEDs Circuits?
