This project is a LED that lights as a heartbeat.
Heartbeat with led light - [Link]
Oscar Gonzalez from BricoGeek has build a nice clock using 7 segment displays and LED matrix. The clock uses and Arduino MEGA with a Real time clock module and an SHT15 board from SFE. Six digits 10 cm tall shows the current hour and date. 4 LED display matrix are used to show temperature, humidity and an RSS feed from the Internet. [via]
A cool clock made of marble – [Link]
This project is a LED fade in and fade out dimmer based on simple electronics components.
LED Fade-In Fade-Out Dimmer - [Link]
Rickard Gunee builds this mini LED dice using one of the smallest microcontrollers, a 6-pin PIC10F200. This mcu has 4 GPIO pins. Using multiplexing it controls 4 strings of LEDs and one input button. The project is open source and also available as kit. [via]
Mini LED dice – [Link]
This project is a LED light grow box that will help you with growing seedlings.
I have one major problem last year with growing seedlings, running out of space. I grow many different types of plants with various germination/growth rates and varied start dates. This forces me to make sacrifices for placement of my movable light and eventually forced to move some plants outside earlier than I should.
LED Light Grow Box – [Link]
Nick Hall builds a LED Pong clock, project files and source code is included. [via]
This project uses the classic video game Pong to tell the time. The 2 players automatically win and lose so their scores reflect the hours and minutes. The clock can also show the time written in words, or with large or small digits. Two buttons allow you to set the time and change the clock mode via a menu screen. The project uses 2 LED matrix panels from Sure Electronics, an Arduino, and a DS1307 clock chip.
LED Pong Clock – [Link]
This is a hand made 10x scale model of a 10mm LED that gives off light via 3 one watt LEDs inside a custom made resin cast (made by me) that also has a Pulse Width Modulation (PWM) light dimmer. To set the cast I first had to create a wooden form of an LED and slather silicone on to create a mold so that I could pour resin into it.
Giant 100mm LED – [Link]
This project is a LED flower that uses PWM controlled RGB Leds which get their settings via USB using obdev.at’s USB stack. The controller board hosts an ATmega88 microcontroller which is running the V-USB stack so that it is controlled by a computer USB port. There is a total of 6 RGB Leds connected on the board using enamel wire. You can find construction details, schematic and software on the link below. [via]
LED Flower – [Link]
This project is a multicolored LED light based on CD4093. Adjusting the brightness of each group is provided by a generator whose frequency is fixed but whose duty cycle (temporal relationship between high and low) is variable. It consists of a fixed frequency oscillator and variable duty cycle for each of three colors. Each oscillator operates independently, which helps determine the degree of brightness of each red, green and blue.
Multicolored LED with CD4093 - [Link]