Friday, November 12, 2010

8x8 Matrix of Red Green LEDs


The circuit on the top is STK500 and the bottom one is my 8x8 Red Green LED matrix. 128 LEDs (64 Red and 64 Green) are multiplexed together with an Atmega644 as the brain in the circuit. This circuit can be used for virtually anything. It has an absolutely amazing controller operating at 20 MHz with 64 KB of Program Memory (Imagine!!!!) and a lot of free analog and digital I/O pins which can be used for interfacing other stuff. Moreover each I/O pin has a Pin Change interrupt, which makes this controller one of the most superior controllers in the AVR family.

I have used this circuit to built a variety of applications like the Scrolling Message Display, Simulator of 2 Random Die, Cross & Naughts, Snake, Gravity based Hour Glass which is animated using an accelerometer i.e. the sand inside it responds to the orientation of the circuit w.r.t earth.



Hope you enjoyed this. More videos will soon come your way!!!!

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