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LED Etch-a-Sketch built without a microcontroller

Posted: May 23, 2013 by getreelfishingpro in Events

A but complex but truly amazing!



This project is a wonderful example of what can be accomplished with a rather complicated logic circuit. It’s an Etch-a-Sketch made from a 16×16 LED grid. That in itself is only somewhat interesting. But when hearing about the features and that it is driven by logic chips we were unable to dream up how it was designed. There’s no schematic but the video commentary explains all.

The thing that confused us the most is that the cursor is shining brighter than the rest of the pixels. This is done with two different 555 times and a duty cycle trick. When you turn the trimpots the cursor position is tracked by some decade counters. Pixels in your path are written to a RAM chip which acts as the frame buffer. And there’s even a level conversion hack that let’s the display run at 15v to achieve the desired brightness. Top…

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RasPi Hackerspace Security System

Posted: April 26, 2013 by getreelfishingpro in Events, Misc Electronics

Scientists Create New Ear Using 3D Printing And Living Cell Injections

Posted: February 22, 2013 by getreelfishingpro in CNC

Cornell University researchers have been pulling all the tricks out of the bag for this one. By using living cells in a collagen gel as the printer’s “ink” the printer layers the gel into just the right ear shape for cartilage to cover, without having to make a mold first.

The Ultimate Cube Solver!

Posted: February 14, 2013 by getreelfishingpro in For Fun

If you have ever been frusturated over that rubix cube that you just couldn’t solve then this isn’t going to make you feel any better about it. Mike Dobson and David Gilday have made The World’s Fastest 3x3x3 Rubik’s Cube solving robot, Built using 4 x LEGO Mindstorms NXT kits (with some additional LEGO pieces) and a Samsung Galaxy SII smartphone.

CubeStormer II holds the Guiness World Record for a Robot to solve a 3x3x3 Rubik’s Cube which is 5.270 seconds.(including the scan time)

The machine was created by Mike and was programmed by David who also developed the two-phase algorithm which finds close to optimal solutions in milliseconds and choses the most efficient solve for the machine’s four grippers to manipulate.

3D Print your own VW Bus!

Posted: February 11, 2013 by getreelfishingpro in CNC

vw bus 3d print

Calebkraft of MakerBot Thing Universe has made a VW bus that doubles as a box from his 3d printer. He also was kind enough to share all his the .STL files so you can make you very own! Check it out and get printing!

Nook Is Worth A Look

Posted: January 17, 2013 by getreelfishingpro in Events

Nook Indutries linear motion systems are worth a look.

Posted: January 16, 2013 by getreelfishingpro in Events