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17 | October | 2011 | Certified Ethical Hackers Security Analyst Malware Hacking Information
From the daily archives: Monday, October 17, 2011

[Nikolai] has a friend who is into fire and light shows. Her birthday was coming up, so [Nikolai] decided to build something to compliment her performances. He came up with a 10 cm LED ball (Russian, Google translation) that has a matrix of 256 LEDs wrapped around its surface.

The ball’s structural support is its own PCBs. The bottom of the ball is a simple bus – no components needed. The processor module fits into the bus along with the side arcs with LEDs on the edge. The top holds two AA batteries and a MAX1674 step up converter. The view from the inside looks like some sort of bizarre alien device. Very cool.

The central processor module is based around an ATmega88. The microprocessor controls two ’595 for each of the 16 side panels. So far, four modes of operation have been programmed – a sine graph wrapped around a sphere, a random function, two oscillating circles, and plain old lines. The code for the LED ball is available (offsite link), and thankfully the variables are in English. An impressive piece of engineering and board layout skills.

Check out the video of the LED ball after the break.

Article source: http://feedproxy.google.com/~r/hackaday/LgoM/~3/YlrmeRSg1rY/

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Spinning DNA animation using sprites

[James Bowman] shows a way to use sprites to simulate parts of DNA moving in 3 dimensional space. The animations are driven by an Arduino board and Maple board, which allows a comparison of the processing differences between the two. [Thanks Andrew]

Tiny Pong

This Pong game is so small (translated), you’ll be fighting over who gets a closer view of the screen.

More CNC halftone pieces

[Christian] made a bunch of halftone pictures with a CNC mill. He took the concept from [Metalfusion's] halftone projects and ran with it. He even posted some video of the machining process (turn down your sound before viewing this one).

Most useless machine

[Jumbleview's] take on the most useless machine makes the entire lid shut off this rocker switch, instead of using a separate arm for the task.

7400 rectifier

[Noel] is using a couple of 7400 chips in an unorthodox way to form a full-wave rectifier. They’re not powered, but instead used for the internal diodes. It’s his entry in the 7400 contest.

Article source: http://feedproxy.google.com/~r/hackaday/LgoM/~3/M9aWT3pgOg8/

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