Chris Radek's stuff


TTT (TrueType tracer)


HTC PocketPutty

REALIZE for AutoCAD (G-Code export)

My CNC machinery

PCB Manufacturing

My stepper drivers

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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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.

American Optical screws26 May 2015, 3:51 UTC

The old styles of rimless and semi-rimless glasses made around 1900-1930 by American Optical (and maybe others?) all seem to have the same screw. They measure about .045 inches diameter and the thread is 90 tpi. (The US dime in these photos is 18mm diameter.)

I made some out of brass and steel, and they came out great. The first operation is cutting the thread, body, and the bottom and outside diameter of the head. Then I parted them with a jeweler's saw. (The bottom screw in this first photo is a too-short original.)

Then, I turned them around and held them in a #11 WW collet to finish the head and cut the slot. The slots were cut with a screwhead file clamped atop an adjustable parallel on the cross-slide.


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.


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:



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:



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:



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