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Charlieplexing 7 segment displays using Atmel Tiny26 microcontroller

Charlieplexing of discrete leds has been the topic of a few other instructables. The Charlieplexing LEDs- The theory and the How to drive a lot of LEDs from a few microcontroller pins comes to mind. They are both excellent and should be read by anyone that wants to gain a deeper knowledge of how charlieplexing really works. Charlieplexing 7-segment displays is more or less the same as doing it with discrete ...

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How To Communicate With An Alien Artifact or . . .

Close Encounters of the Curiously Minty Kind. This Instructable will show you how to build an Altoids version of the 'Close Encounters' mothership, and how to interact with it. This may be vital training for that day when the Bright White Beam comes to suck you up into the unknown. It will also introduce you to the PicAxe microcontroller chip and a method of drilling perfectly spaced holes in thin sheet met ...

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A sunrise and sunset lamp with LEDs

You know it, in the winter time it is hard to get up, because it is dark outside and your body just won’t wake up in the middle of the night. So you can buy an alarm-clock that wakes you up with light. These devices are not as expensive as few years ago, but most of them look really ugly. On the other hand, most of the time it is also dark when you come home from work. So the great sunset is also gone. Wint ...

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LED Scolling Dot Matrix Font & Graphics Generator 5×8 5×7 8×8 using the AVR ATtiny2313 and AVRStudio

If you are into geeking it out with projects of the electronical kind, then you have likely wanted to create a dot matrix display or a POV. To do this you will need to have a font file or table to read the characters from. There are alot of ways to get this file. The common sizes of displays are 5x7 and 8x8. There's alot of places online where you can get ASCII 5x7 fonts, but I am making a scrolly display w ...

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Color Changing Digital PC Fan Controller using Microcontroller ATMega168

We've all seen LED fans that you can put in your computer to make it look cool.  They usually come in blue, sometimes red or green and consist of a basic PC fan with 4 bright LED's mounted in the 4 corners.  They source their voltage from the fan's power input, so if you're using a fan controller (either the one built into your motherboard or otherwise) to slow the fan, the LED's get dim. Well, I got a new ...

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LED Cube 4x4x4 using Microcontroller Atmega16

Amazing 3 dimensional LED display. 64 LEDs makes up this 4 by 4 by 4 cube, controlled by an Atmel Atmega16 microcontroller. Each LED can be addressed individually in software, enabling it to display amazing 3d animations! 8x8x8 LED cube now available, by popular demand: http://www.instructables.com/id/Led-Cube-8x8x8/ First of all, you need quite a bit of time to solder together 64 leds ;) Knowledge list: Ba ...

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Make a 8×10 L.E.D Matrix using the Arduino and 4017 decade counter

In this instructable I will show you how to build a quite fancy 8 by 10 L.E.D matrix(with scrolling text and animations) using the Arduino and 4017 decade counter. This type of matrix is easy to make and program and it is a good way learn how to multiplex. I have added another part to this instructable about using the 74HC595 shift register which will help to save some arduino pins for other thing you would ...

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