Chris Radek's stuff

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Sherline lathe conversion

Image to G-Code conversion

STL to DXF conversion

Historical IBM AT stuff

A few of my homemade clocks


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About this site

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Welcome!

Recently I've found myself working on more and more projects/hacks that I want to share. I'm disorganized and my interests go here and there, which might mean this blog format will be a good match for me, since blogs are like that too. Follow the links at the left to visit the more persistent parts of the site; the content below will change.

Old programmer lore tells us that the last 20% of a project takes 80% of the time. This problem, combined with my tendency to stop working on a project as soon as it does what I want, has led me in the past to never share any of my unpolished work. I've decided to try to overcome that, not by changing my personality or work habits, but by sharing my 80%-finished projects anyway. I think they're useful as-is, and if you do too, that's great. If you don't think they're quite useful yet, please add on what you need.


Pendant necklace25 August 2014, 15:55 UTC

AJ found a plain sterling pendant necklace for $4 at goodwill. It was boring, so I used image2gcode (included with LinuxCNC) to engrave a nice dragon on it.


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Freight Train for banjo20 July 2012, 14:59 UTC

This is really a guitar song but my banjo rendition was interesting to some folks last night at the gathering at CGS music. I drew up this tab before I got the typewriter, so it's a little less readable than the newer ones.

(Don't miss it done right.)

Files attached to this page:

freight-train.png552.3kB


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Dinah, a love song for banjo10 July 2012, 1:59 UTC

This is a traditional tune that I've written out to share with this month's "third Thursday" banjo workshop group at CGS Music. I heard it first on a David Holt recording (I think it might have been his first record.) He does it with brave simplicity and I've tried to capture that. I don't think this tune is very well known. I play it in double C, but as is traditional when being nice to fiddlers, he tuned up to D.

Files attached to this page:

dinah.png355.0kB


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OpenWRT on a WRT350N23 December 2011, 20:33 UTC

The OpenWRT project has packages for the Linksys WRT350Nv1 (they call it v1, but on my device there is no v number) but they do not work. However, if you build your own custom Backfire image, it can be made to work.

Attached here is the .config file I used to build Backfire (10.03.1, r29599) for this device.

Files attached to this page:

dot.config93.8kB


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TV Clock8 October 2011, 1:51 UTC

I turned a 1980 model "portable" TV from Goodwill into a little clock. I removed the now-useless broadcast tuner and deciphered the remaining circuitry well enough to determine where to inject sync and luminance signals. These signals are generated and bit-banged by an ATmega8 AVR.

The clock also contains an old wifi router running OpenWRT in client mode, so it can attach to my wireless network and sync to the 'net using NTP. The wifi hardware then continuously sets the AVR. The clock displays local time on top, and UTC on the bottom. So to set the timezone, you just log in to its web interface over the wireless...
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