Pilgrimage to Gateway Electronics

October 10th, 2010

A couple weeks ago I headed out to St. Louis to attend Arch Reactor's grand opening 2.0 and meet up with some friends in the Lou.  I headed out a little early so I could hit up Gateway Electronics before the open house.  Several people had mentioned Gateway and it's awesomeness before, so I had to check it out for myself.  I picked a good day to stop in, as they were celebrating their 50th anniversary.  I was quite impressed with the wide array of stuff they offered and it was obvious that their focus was on the hobbyist market.  They've got a decent array of general components in stock and a lot of prototyping stuff, project boxes, breakout boards, perf board, PCB etching and repair supplies.  They also had a lot of old equipment including scopes, variacs, and used lab equipment, a huge collection of tubes, most in their original packaging, and a lot of surplus/pulled parts.  Unfortunately, I didn't have any projects on the table that I didn't already have the supplies for so I only ended up grabbing some components that I thought would be cool to include it some future projects.  I picked up some single digit VFD tubes cheap, some industrial keypads, a cheap project box or two, some cheap linear pots, and one giant red illuminated push button.  It's too bad there's not really any place like this in KC...

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New Awesome Analog Scope

September 27th, 2010

I picked this up the other weekend at a swap meet in KC, and it's by far one of the better swap meet purchases I've made.   Since it's got horizontal and vertical input input I'm hoping to use it as a display for the CCCKC analog computers courses.   I don't quite know what this is eventually going to be used for but it just radiates awesome!

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Cricut Direct PC Control Working!

August 16th, 2010

After a bit of work and help from fellow Hackerspace members, we managed to figure out how to talk to the Cricut.  Check out the Cricut Wiki I started for more details on the protocol and check out the libcutter project on GitHub if you want to start writing your own control software.  Libcutter's goal is to be a nice cross platform library for controlling the Cricut and potentially other similar devices.  Right now all our experimentation has been with Cricut personals at firmware revision 1.34, but I'm hoping it'll work with other models as well.  I coded up a quick Python demo script that's a Logo interpreter for the Cricut that's included with libcutter.  Here's a quick video of it in action:

I've also got a quick Windows only Python module implementation that you can use to control the Cricut as well.  To get everything up and running, you'll need to get Python and PyUSB installed and grab this nice Python XXTEA implementation.  After that, just download the Cricut protocol module and the Logo demo script and you should be ready to draw (or cut) your favorite Hackerspace logo, or perhaps a hole bunch of circles:

You can of course write your own control programs to do other equally useless but still fun things:

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Cricut Cartridge Dissection

May 6th, 2010

I borrowed a Cricut cartridge for a quick tear-down.  Here's the "front" (the side that faces away from the cutter) of a "Cricut Sampler" cartridge:

And here's the back:

The markings don't show up in the picture, but the big chip on the PCB is an ATmega16 and it's paired with a 4MBit serial flash part.  The 6 pin .1" header seems to be wired for in circuit serial programming.  Here's a pin out:

Header Pin ATmega16 Pin
1 2 - MISO
2 5 - VCC
3 3 - SCK
4 1 - MOSI
5 4 - RST
6 6 - GND

From the markings on the PCB, I would imagine that most cartridge hardware is identical.

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Workshop Aquired!

May 2nd, 2010

Finding a nice place to set up a workshop was a goal I set for myself a few months back when I outgrew my makeshift basement workshop.  I managed to find a commercial location that fits my needs nicely but it needed some serious internal remodeling.  Thankfully, because of the state that the place was in, the management company was more that willing to let me make a number of modifications to the property and lease it to me for a reasonable price.  I've been rather busy lately cleaning the place out, painting, moving stuff in, etc. and there's plenty more left to do but it's just getting to the point now were it's a usable space. I'm super excited about having a nice work space with plenty of room for some larger scale projects!

(P.S. I've made a little bit more progress with the Cricut, so hopefully I'll have some of the kinks worked out of my logging stuff soon and I can post some more detailed info on talking to the thing!)

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