This microcontroller project is another version of a persistence of vision or POV toy. It has 8 LEDs and it is powered by ATtiny2313 (AVR microcontroller by Atmel) operating at 2 x AA batteries. This is a tiny toy and it can be carried easily inside your pockets.
tinyPOV – Yet Another AVR POV Project – [Link]
After I made my Kitchen Mood Light, I had another idea for 3W RGB LED’s. My idea was to make a simple lamp with 3W RGB LED’s, controlled by a MCU, and have an IR remote control to change the color, effects and patterns.
Mood Lamp – [Link]
At the beginning this project was to buy a led sign to interface with my home automation network. This automation network display information like temperature, wind speed, humidity, etc. I had bought on EBay a LED Sign but when I received it I got a surprise! There was no serial port to program messages… After a couple of days, I look inside to see how it was built.
LED Sign with MMC Memory card – [Link]
Sometimes it’s handy to have a message display when persons enter a specific area. Having the message appear only when someone approaches brings more attention it, and can be useful for holiday displays, directions or warnings. In this project by Jer from Volts and Bytes, an Atmega8 is used to activate a Sure Electronics 0832 LED matrix display when motion is detected by the attached PIR sensor.
The C source and supporting files are available in this zip file.
PIR controlled LED matrix display – [Link]
Last week on hack-a-day I saw their post on an LED Menorah that was powered by a 9v battery with the lights controlled by dip switches. I thought to myself, “gee, that’s not a very creative design”. There was redemption in the minimalist designs linked too showing a menorah soldered to a tiny2313 and one soldered to an LM2913, both without a circuit board.
LED Menorah powered by AVR tiny13 – [Link]
This instructable is meant to be a more complete explanation than others available online. Notably, this will provide more hardware explanation than is available in the LED Marquee instructable by led555.
GoalsThis instructable presents the concepts involved with shift registers and high side drivers. By illustrating these concepts with an 8×8 LED matrix I hope to provide you with the tools needed to adapt and expand to the size and layout your project calls for.
LED matrix using shift registers – [Link]
Cree, Inc. reports another industry-best efficacy record of 231 lumens per watt for a white power LED. This result is a significant advance beyond Cree’s previous industry record and further demonstrates how Cree’s relentless innovation continues to push the boundaries of what is possible with LED lighting. [via]
231 Lumen per watt LED shatters LED efficacy records - [Link]
While an LED beacon doesn’t serve too great a purpose, it is a great design exercise for students new to the world of microcontrollers. The beacon uses a PIC and some transistors to control the beacon’s lighting. The article describes how it works and how to make your own.
A Simple LED Beacon – [Link]
This project was, effectively, my introduction to microcontrollers. I was rather short on time, though, for this (it was a Christmas present, after all), so I’ve had to wait until after the fact to write about it. So, this is a long post.
The idea is that, inside of a frosted plexiglass cube, there’s an accelerometer, a microcontroller, and a few RGB LEDs. As the cube is tilted, it glows different colors. Each axis from the 3-axis accelerometer controls the brightness of each color component in the LEDs. Prior to doing this, I hadn’t had any experience with microcontrollers beyond knowing what they are, so I had a fair amount to learn.
RGB Tilty Cube - [Link]
The Atmel ATTiny85 chip is an 8-pin MCU that is totally awesome. If you’ve been programming with the bigger boys (the ATMega series), these are a nice adventure – you’re rather limited in the number of output pins, but a creative design gives us a lot of flexibility in a very small package.
Apple-style LED pulsing using a $1.30 MCU – [Link]