App note: Ambient lighting design utilizing RGB LEDs

App note from OSRAM on using RGB LEDs or their MULTILED® for automotive interior lighting. Link here (PDF) This application note describes the advantages and challenges of utilizing RGB LEDs for ambient lighting control. Besides pointing out practical challenges, preferred solutions for RGB LEDs are outlined and discussed to assist customers with engineering design solutions.

Driving a 48-segment RGB LED bar graph with a Teensy 3.2

Glen Akins writes: In my post Driving a SparkFun 48-Segment RGB LED Bar Graph, I stated that the hardware built there could be used to drive the LED bar graph with any combination of hardware and software that could drive one of the common 32×32 or 32×16 RGB LED matrices. Today I’m back to prove […]

An Arduino Knight Rider Rainbow dice that uses WS2812B RGB LEDs

An Arduino Knight Rider Rainbow dice built using a clock by Davide Gironi: This project implements a Knight Rider / Rainbow effect Random Selector. It uses an Arduino UNO and a WS2812B RGB led strip. A friend of mine needs a random selector for train scale model. I’ve developed this using the Arduino framework, because […]

Building a 3-channel, high power RGB LED driver

Francesco Truzzi published a new build, a 3-channel (RGB) LED driver: I built another board, which is a 3-channel (RGB) LED driver based on an inexpensive chipset called PT4115 (you can find them on eBay or Aliexpress). The circuit is very simple and looks like Sparkfun’s PicoBuck. However, I used beefier components and a different chip. You […]

App note: High resolution RGB LED color mixing

This application note from Microchip demonstrates color mixing using the PIC12F1572 MCU (PDF!): This application note demonstrates color mixing using the PIC12F1572 processor. The PIC12F1572 processor features three 16-bit pulse-width modulators (PWMs), among other peripherals. The 16-bit PWMs allow precise control over each RGB LED, allowing smooth transitions even at low-brightness/luminosity levels.

DIY programmable bike light – Arduino or ATTiny and RGB LED

Oscar built a  DIY bike rear light to keep him safe and wrote a post on his blog detailing it’s assembly: In this project I will be using a microcontroller to allow for switching between the various functions I programmed. The entire system is built on the backbone of an ATtiny4313 chip with a few other parts totalling at about $35. […]

BitBltBlade – WiFi controlled POV lightsaber

Madox designed the BitBltBlade, a WiFi controlled POV lightsaber designed to display images in conjunction with long exposure photography. The BitBltBlade uses the hackable TP-Link TL-WR703N router and Kean’s USB Expander board to wirelessly control a strip of RGB LEDs. The concept of operation is that the user would use their smartphone which can upload photos […]

Clock with 180 RGB LEDs on home-etched circuit board

An Arduino-based clock with 180 RGB LEDs. The LEDs are driven via 12 TLC5925 1- channel constant-current addressable drivers. Its built on doublesided copper clad board using Toner transfer method. The routes aren’t smaller than 0.44mm and all vias are made for 0.8mm drilling (truly DIY). Just around 5 vias are under a component and […]

Pachube controlled RGB LED

Andy from the UK was looking to build a simple proof of concept project which would integrate an Arduino and ENC28J60 based ethernet shield (or a Nanode) to connect with his Pachube account to control an RGB LED. He says: This article describes a simple application to demonstrate the ENC28J60 EtherShield library. It can be […]