Basics: Picking Resistors for LEDs | Evil Mad Scientist Laboratories
Basics of designing LED Lighting circuits
Flashing-LED Battery-Status Indicator Circuit circuit diagram and instructions
Build Your Own LED Circuit Battery Level Indicator | Jameco Builds
How to Use a Charged Capacitor to Light an LED
Easy LED Circuit : 5 Steps (with Pictures) - Instructables
File:9v battery and led circuit components (wires, battery, LED, resistor).jpg - Wikimedia Commons
Simple Basic LED Circuit | Circuit Diagram
Battery and LED without resistor | LEDnique
3 LED Battery Level Indicator Circuit - Homemade Circuit Projects
Simple LED Circuit Diagram
LED_circuits
Three LEDs in a Series Circuit – yeprite
Battery-Powered Night Lamp Using an Old LED Bulb | DIY Project
Battery indicator connected with bicolor led - Electrical Engineering Stack Exchange
3 Simple Ways to Light an Led Bulb with a Battery - wikiHow
Low Battery Indicator using 555 Timer
Simple Basic LED Circuit (How to Use LEDs) : 4 Steps - Instructables
Battery and LED without resistor | LEDnique
Efficient LED power supply has battery backup - EDN
Lighting an LED Using an Arduino Board — Cool Components
Simple LED circuit with 9V battery – helloCircuits!
Why does an LED burn if connected to a battery without a resistor? - Quora
