LED Beginner Project: Part 2. I've always been looking for a reason to use an Altoids tin as a project box, and this project seemed to be it. - Altoids tin - 2 AAA battery holder from Radioshack.
. - three way toggle switch that I scavenged. Notes on LEDs. LED Parts LEDs come in all shapes and sizes, but the 3mm T-1 or 5mm T-1¾ are probably the most common.
The die is an itty bitty cube of semiconductor, the composition of which determines the color of the light given off. LED Chaser. Battery Christmas Lights: How to convert Xmas lights to run on batteries/DC (regular or LED) Running Christmas lights off batteries (DC power) This page was the original hook-up on the web for battery Christmas lights!
Way back in the 1990s this page showed readers how to re-wire Christmas lights to run off batteries, since battery-powered Xmas lights were extremely rare. The article also turned readers on to LED Xmas lights, which were new and extremely rare at the time. LED Christmas lights. One of the bummers of Christmas is trying to get the strings of lights to work.
The biggest culprit are the strings that are connected in series. These are usually the strings of so-called miniature Christmas lights with the push-in bulbs. LED series parallel array wizard. Don's LED Main Page. Most recent update or addition in anything below of mine 2/16/2014, with the latest noted update on links offsite from here 4/6/2014.
Efficient and bright LEDs! Efficiency of some good ones and some runner-ups in lumens per watt, millicandela and beam angle ratings for some of these, where to get most of these. Alan Parekh's Electronic Projects - LED Resistor Calculator. LED calculator for single LEDs.