Raj over at Embedded Lab has just finished a new project article about Wifi-enabled LED matrix display using ESP8266: This project is a modification of my previous Bluetooth-enabled LED matrix display project, which used 8×64 monochromatic LED matrix (total 512 LEDs) for displaying scrolling text message. The original project used Bluetooth for display data transfer […]
Florin wrote an article about experimenting with MAX6955: My experimenting actually started with MAX6954. After many failed tries due to SPI issues (Maxim uses a special interpretation of the protocol, I read), I switched to MAX6955. MAX6955 is the I2C sibling of MAX6954 (which uses SPI). They both have identical LED driving abilities, only the […]
A SNAFU box project by Bertho of Vagrearg: SNAFU Box consists of 24 LED strips (12V passive type) of varying size, which are controlled by a set of 74HC595 shift-registers and a transistor driver for each strip and RGB channel. The LED strips are used to backlight the lettering of the box. An additional three 74HC595 […]
Ladvien blogged about his Lab LED constant current controller board project he made using DirtyBoard PCBs: A little lab controller PCB I’m working on. It centers around four high-power constant current circuits meant to be driven by an Atmega328’s PWM. I hate working on anything mechanical in dim light; comes from dropping parts down under […]
Dilshan Jayakody writes: AN6877 is linear AF level meter IC produced by Panasonic and it is commonly found on many audio equipment. This chip is no longer manufactured by Panasonic and finding replacement chip for AN6877 is also quiet difficult. The circuit described in this article is design to replace AN6877 base LED drivers and it […]
Limpkin writes, “I’ve always wanted to play with these 10W RGB LEDs! So for some reason I bought 2 IKEA lamps at a flea market. As IKEA furniture has a long history of being hacker-friendly, I figured they shouldn’t be an exception to the rule. My plan? Fit a few 10W RGB LEDs in there […]
Dmitry Grinberg writes, “Lighting a room is always a complicated task. This is especially true if you’re an engineer. You see, we all love blinking lights, RGB LEDs, really any combination of those things. When it came time to figure out the ligting situation for my room, I immediately knew that lots of LEDs would […]
Evan writes: This is my proof-of-concept for using mqtt with the esp8266. I saw this LED display sitting around and I couldn’t imagine why no one was using it, the answer was no one knew how to talk to it. Easy, I think. Looking at the board it’s just an 8031, a serial level shifter, […]
Marcus Jenkins writes, “I made this gadget which steps up the game from leaving a light on at home when you’re out. Place in near a window to make it look like somebody’s at home watching TV. ” Project details at Marcus Jenkins’ site. Via the contact form.
Zach writes: I first posted on how to reprogram a “Programmable Message Fan: Model 45 Series” POV fan a few years ago, and the code I posted no longer works with the current versions of the Octave and Arduino software. The original post still describes how the fan works and how I went about figuring […]
Kurt Skauen has been working on a DIY 1188 LED dual sided UV radiation unit: The UV exposure unit is controlled by an ATmega328P microcontroller and have the following features: Single and double sided exposure. Each side radiated by a 594LEDs / 30W UV LED panel (The unit has a total of 1188 LEDs providing […]
Mike Szczys of Hackaday built 1-Pixel Pacman and wrote a blog post detailing its assembly: I usually see retro-gaming projects using tiny screens with a fair number of pixels (64×64) but what I really like is the look of making every pixel count. With this in mind I built 1-Pixel Pac-Man, the classic coin-op experience but with […]
Here’s an instructable on LED Matrix with custom code/software by Ole_L: This is the software which you need: -Arduino -Processing Flash the software to your Arduino and open the processing project with… Processing! Now you should change the line “String portName = “/dev/ttyACM~”;” to your Serial port, on WINDOWS “String portName = “COM~”;” Via the contact […]
Amir Avni made a graphic equalizer display using ESP8266-12, MSGEQ7 and WS2812: Finally, I’ve created a this project: An equalizer display controlled by ESP8266 with the NodeMCU firmware, where the equalizer colors are controlled via WiFi Project info at whatimadetoday site. Check out the video after the break.
Quindor blogged about his ESP8266 WiFi LED dimmer project with DirtyPCBs: With the help of kind internet folks I was able to get a fritzing part for the new voltage converter I wanted to use to try and make a smaller board. A few weeks ago I sent my new ‘panalized’ design to dirtypcb’s and I got […]
Bogdan of Electro Bob built a LED logger v3, that is available on github: In short: 16 LED channels are measured, one is kept for control of the sensor. For each LED the power supply and current are measured. The temperature of the aluminium plate is measured as well. In total there are 16 light channels, 15 […]
Bob Davis has been working on an 8×8 RGB LED array with a Raspberry Pi project: I have been working on a book of Raspberry Pi projects. One of the projects is an 8×8 three color LED array. I picked up some more of them on eBay lately and they had a different pin-out. The MEU 8860 […]
Anurag Mishra writes, Recently I bought a new pair of Inline Skates. So an idea struck my mind. I modified my skates to give me some results. I wanted to measure the speed with which I am skating and if I get to know the surrounding conditions, that would be awesome. So, I brought an […]
Markus Gritsch shared his WiFi LED light project in the forum: I built a prototype for a WiFi controllable LED light, using the popular ESP8266 module running the NodeMCU firmware . To allow controlling the WS2812B LEDs from Lua, I extended the firmware with a bit of C code Check out the video after the break.
A followup to the constant current driver for a high power LED post, Elmars writes: If anybody is interesed, I have posed a follow up to this original post with a simple PWM LED driver, adding an ATtiny85 mCU. The post includes schematic, board layout and code for the ATtiny85. I hav tested the circuit up […]