npn - 2N2222 as a switch - Electrical Engineering Stack Exchange
Light Emitting Diodes
Powering Any WS2812b Setup — Project Tempos
LEDs for Beginners : 9 Steps (with Pictures) - Instructables
How to Drive Many LEDs / High Powered LEDs with GPIO | A Beginners Guide - OKdo
Amazon.com: DiCUNO 1000pcs 3MM LED Assorted Light Emitting Diodes Diffused 2 Pin Round Color White/Red/Yellow/Green/Blue Kit Box (5 Colors x 200pcs) : Industrial & Scientific
L1: Turning on an LED - Physical Computing
How to Use a Transistor as a Switch | Nuts & Volts Magazine
LEDs for Beginners : 9 Steps (with Pictures) - Instructables
Android Basics and User Interfaces
LED Resistor Calculator
Choosing the Resistor to Use With LEDs : 3 Steps - Instructables
Android Basics and User Interfaces
LED and resistor in series from +5V to digital in - General Electronics - Arduino Forum
Using a transistor to control a LED - Electrical Engineering Stack Exchange
LEDs for Beginners : 9 Steps (with Pictures) - Instructables
L1: Turning on an LED - Physical Computing
5V LED Dimmer Circuit
How to use LED circuit in basic ways | ElecCircuit.com
led - Resistor requirement for 3.3 V supply - Electrical Engineering Stack Exchange
Basics: Picking Resistors for LEDs | Evil Mad Scientist Laboratories
RGB LEDs Provide Multicolor Display Solutions | DigiKey
