The light intensity of LED’s drops over time. Bogdan wanted to figure out exactly by how much the light intensity of his LED strips dropped, so he build a light intensity logger. It’s basically a closed box with an LED strip and a light intensity sensor inside. An Arduino reads the sensor and stores the […]
Tag Archives: LED
PIXEL interactive LED art mirror
Here’s an interesting art piece for your living room. It’s a Bluetooth controlled 32×32 LED matrix mounted in a picture frame. It’s designed to display pixel art uploaded from your android device. The LED matrix is controlled via an Android device through the IOIOMint board. PIXEL is open source – both the hardware and software. […]
Color organ – LED light show
Want a simple light show in your room? Here’s an Instructable on how to build your own. The Color organ is all analog and built from only transistors, resistors, capacitors, and of course LEDs: Audio source can be any “line level” output from audio equipment, or headphone output from computer sound cards and iPod/MP3 players. […]
Xmas tree with sound-controlled LED animations
Sound controlled LED light show for your Xmas tree. An STM32 microcontroller takes instructions from a PC via Bluetooth and animates the LEDs. This is my Christmas tree, it has over 400 lights (exactly 404) that are all individually controlled by an STM32 microcontroller. The computer plays the music and processes the sync track for […]
Jingle bells playing Christmas tree
Here’s a fun project in the Christmas spirit. It’s a “Jingle bells” playing card, with the specific notes being signaled via LEDs as they are being played. We have 9 control lines for the LEDs and 1 line for the speaker signal. We want the device to start playing if a push button is pressed […]
Led matrix with HT1632C controller
Luca wrote a tutorial about LED matrices with HT1632C controller.
Arduino based stage design
Like large things that light up? Here’s a Arduino based stage design consisting of eight large wooden letters lighted by 110 LED modules. Arduino and application code are released on GitHub. I made with some friends an Arduino based Stage Design: eight 80cm high wooden letters and 110 Led modules controlled by a Processing application. […]
LED packaging overkill
Order a single surface mount LED, you expect a small “anti-static” bag with a tiny LED inside. Wrong. Here’s what Systemstech got when he ordered one. A large “anti-static” bag, with a dehumidifier bag, and a humidity sticker inside. The actual LED is the tiny black dot on the right. Got a packaging overkill stories […]
Flickering pumpkin LED designed in KiCAD
Add some LED goodness to this year’s Halloween pumpkins. This flickering LED design on a pumpkin shaped PCB was drawn up in KiCAD. Grab the design files from the low voltage labs site. It’s a simple schematic with just a switch, resistor, battery holder and 10mm LED. But makes for a nice easy project to […]
Ringo3 LED clock assembly
Community at it’s best, one forum member helping another. Matseng sent a Rino3 clock PCB to Arup, which he populated even before the Matseng got a chance to build his own. They are now debugging it together: Few days ago I received one ringo3 PCB from forum member masteng. It’s having 60+60+12 LEDs (ss,mm,hh). The […]
INTRO GUIDE: Basic light emitting diodes (LED)
Image by kaktuslampan: CC BY-SA Probably the most used device in out projects is the humble LED. They’re in almost every piece of equipment around us. While LEDs are simple to use, we get a surprising number of requests for a LED tutorial. This guide is an introduction to LEDs. Not just how to light […]
Bluetooth controlled RGB LED strip
Hmms shared his Bluetooth controlled RGB LED strip project. Atmega8 microcontroller with the Arduino bootloader controls the LEDs, while the Bluetooth communication is handled via a cheap serial to Bluetooth module. I wanted the strip to be Controllable via a PC or a Mobile Phone.So I decided to make my own RGB LED strip Controller […]
Water LED graffiti
Here is a what happens when art and electronics mix. This is LED covered wall is activated when a drop of water covers a small contact patch surrounding the specific LED. The basic principle is so simple yet the art created looks great. You can read more about this built on the link provided. Basically […]
Word clock with capacitive sense buttons
Trax designed and built this word clock with capacitive sense buttons (machine translation). Hours and minutes are displayed as text instead of the typical numeric representation. The firmware also has an alternate option that turns the entire clock into a large scrolling display.
Tetris on a 16×8 LED matrix display
Graham designed a portable Tetris game on a PIC18F4520. It uses two 8×8 LED matrices as a display, and 4 buttons for control: The 64 LEDs and four buttons are controlled by a single PIC (18LF4520) and two AA batteries. The source code operates very efficiently, and the program is extremely responsive. I was worried […]
PixelController LED control software update
Michu made some improvements to the open source PixelController software. This app is intended to control various light-show drivers such as the Art-Net, Mini-DMX, LPD6803 and Seeedstudio’s Rainbowduino. I’m updating my PixelController software and did some major updates like an integrated GUI, Color Sets etc. Take a look at the Screenshot, the code is on […]
Binary Burst clock ticks away the time with LEDs
The Binary Burst clock shows the time with LEDs: The clock uses 3 LEDs on each spire to count up to 5 in binary. The hours are displayed by the middle LED in RED (Its a Red/Blue bicolor, the others are just blue). Video, and links to the board and code repository are included in […]
LED produces 2.3x more light energy than electrical energy consumed
MIT physicists developed an LED that emits more light energy than the electrical energy consumed. These LEDs supplement electrical energy with heat from the surrounding environment. Unfortunately this has only been observed at very low power levels. The researchers chose a light-emitting diode with a small band gap, and applied such small voltages that it […]
How-to assemble the StripInvaders LED system
Michu made instructions on how to assemble StripInvaders. All that is needed is a few wire splices, other then the already required Arduino Ethernet, and the Grove – Base Shield. This video shows you how to assemble the StripInvaders LED System. It’s really easy, take a look! Via the forum.
App note: Control LED brightness with buttons.
Maxim shows how to build a LED brightness controller with 64 level of control using push buttons. The design incorporates a current regulator that is driven by a 64 tap digital potentiometer. The buttons increment and decrement the tap. Via Electronics-Lab.