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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Fire piston

Posted: May 2, 2013 by fink000 in Events
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Hey guys the other day one of the members who are working on the Redbull project was talking about a Fire piston. I had never heard of this, so I decided to do some research. I found a video of one that is made of acrylic and really easy to make. I go camping alot and a way to start a fire without matches or lighter is something that would come in handy.

RasPi Hackerspace Security System

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

Please Comment with the types of tools that you would like to have available to use.



Let The Games Begin!

Posted: April 17, 2013 by ummdorian in Events

The package arrived from redbull today, and almost got sent back because they forgot to put my apartment number on the address label.  Luckily I stopped by the post office to check on it.  And OMG.


Over the top laser cut packaging.

IMG_0454Sweet silkscreen on the pcb.


Crazy long addressable rgb strips.



Pin Headers.


So many IC’s to learn, someone should post all the datasheets.

We’ve got until May 5th to make our creation and we’ve got to make a video of it less than 3 mins so minimal build video.  We’ve got a plan which we think will blow people away but I don’t want to give anything away so our competition gets a heads up so ask Kyle or Me.  I’m working on some stepper motor controls and this weekend we’ll start construction.  Let’s do this!

Redbull Creation Contest 2013 Here we come!!!!

Posted: April 14, 2013 by kwood94xj in Events

This year UmmDorian was awesome enough to enter us into the 2013 RedBull Creation Contest. This years hardware is called the TURBULL ENCABULATOR!!

“The TurBULL Encabulator is our very own super simple, but extremely complicated, multi-function circuit board designed to give Makers a powerful tool in the creation of controllable LED lighting art and inventions. The Arduino-controllable board features a tri-axis accelerometer, temperature control sensor, as well as a 2nd generation reciprocating dingle arm (no, not really) in a Bulls and Sun shaped circuit board.”

Our TurBULL Encabulator is in the mail and should be here very soon. Stay tuned for more updates!




Programmable Power Supply Kit.

Posted: March 20, 2013 by kwood94xj in Bench Tools

Recently I was in the market for a new adjustable power supply. I searched all over for reasonably priced full featured PSU. I was considering going the hacked computer PSU route, but with its voltage maxing out at 12VDC it would not fill all my needs. Then I stumbled on this kit. It is a very well designed board based on a Atmega8 chip.

It features

  • A 16×2 LCD that displays the set voltage and current. it also displays the actual voltage and current.
  • A 5 button control interface to set the voltage and max current. There is a Store function that will save the current settings and re apply them on power up.
  • You can build it in many different voltage and current configurations. (22VDC 2.5A or 30VDC 2.0A are the standard configs)
  • Very low part count and all the components are through hole making it easy to assemble.
  • With the optional DDCP to USB kit you can set the output voltage and current with your PC via USB

The price of the kit is also very attractive at $31.99 it is a bargain. All that you need to add is a Atmega8, an 16×2 LCD, Heatsink, Transformer/Rectifier, and a Case.

The DDCP to USB kit that allows computer control is only an additional $17.20

I will post pictures of it in action along with a full review when I have completed the build.


Welcome ummdorian!!!!!!!!

Posted: March 12, 2013 by kwood94xj in Hackerspace News

I would like to take the time to introduce our newest member to the Blog ummdorian. He brings extensive skills in web design and micro-controller programming. I personally look forward to his contributions to the hackerspace community.

Here is a quick vid of my new MAME machine. I do plan on doing a full writeup on the process I did to make this, but for now here is a video.

Video  —  Posted: March 6, 2013 by fink000 in MAME
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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.