LED Schematics

Simple schematics: how to connect a LED

A LED must have a resistor connected in series to limit the current through the LED, otherwise it will burn out almost instantly. If you are new to this, you could use this online tool to calculate the resistor value.The tool can also be used for LEDs in series or parallel. For more advanced schematics, please see below:

How to make a LED flash

With some simple electronics, i.e. a transistor, you can make a LED flash / blink at the desired speed. Please see the links below for examples:

How to make a LED sequencer /chaser

A bit more advanced is the LED sequencer or chaser:

LED counters and timers

Below are some schematics for LED counter and timer circuits:

RGB Mood light controller schematics

These are interesting projects for people that want to build a mood light:

LED and microcontrollers (Microchip PIC, Atmel AVR)

These are interesting projects for people that want to use microcontrollers:

(White) LED current drives

These are interesting projects for people that want to use microcontrollers:

Various