Getting Started with the Arduino - Controlling the LED (Part 2)

How to program the Arduino to turn on/off an LED with a button, and use a photoresistor to control the flashing rate of an LED and the output of a speaker.

Controlling Multiple LEDs With Arduino - 6 Steps

Arduino Starter Kit 2: Use Buttons for LED Control : 3 Steps - Instructables

Powering LED Strip and Arduino Nano from same power supply - General Electronics - Arduino Forum

Multi-tasking the Arduino - Part 1

Button w/ LED not working ( First Project ) - Project Guidance - Arduino Forum

L1: Turning on an LED - Physical Computing

Relay Control LED Seeed Studio Wiki

Controlling LEDs with A Multiplexer and Arduino — Maker Portal

Controlling Multiple LEDs With Arduino - 6 Steps

L1: Turning on an LED - Physical Computing

Blink two LEDs with Arduino