Hog’s Foot

I wanted to try my hand at making a stompbox from DIY stompboxes and decided to try the Hog’s Foot, since it seemed simple and I had the parts.

What I didn’t have was a decent enclosure. So I put it in an Altoids box. It just barely fit. I wasn’t satisfied with the cutting, reaming and bending metal, so I conjured one up in OpenSCAD. I think it turned out much nicer. And now I’ve got a modifiable model to add more controls and make bigger to fit larger projects (like the Little Angel that I’ve got soldered up.)


The progression – Altoids – test box, shielding, front face, guts.


And the flip-sides.

I modeled the box after the Altoids container and gave myself some more room. I added labeling with embedded text and printed a scan of Slicey the Pig. Lots of light layers of high-gloss clear-coat and we’re ready to rock!

Some detail (preparing for the next one):




The flash and high-gloss really bring out the grain in the plastic extrusion. Perhaps I should try wet-sanding the plastic surface…



And the gut-shot.


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More minicar pix

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Minicar pix

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Outside walkways

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Porcelain and tile


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On the way up

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Up she goes

A bit out of order, but here’s the delivery of the building pieces.

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Dot matrix grid (Thing 210015)

eBay has these chainable 8×8 led matrix (MAX7219) for fairly cheap.


I put together a sequence of 4, as that is all that would fit on my 3.5″ x 6″ protoboard. I connected an Extracore (mini-arduino), power regulator, thermistor and clock to make a tool to present data sent in from the USB connection. On the Linux side, I have a cron job running a php script to eat some data off a website and push it up to the board which presents the data in a loop.

After tweaking the font size, the 8×8 x 4 grids really only let me present about 6 characters and some punctuation. Enough for then. But now I want MOAR!

So, trusty OpenSCAD to the rescue!


These elements connect together and allow mounting of multiple MAX7219’s. I intend to link a set of 8 to get 12+ characters. Perhaps I’ll make a few more connectors to hold the other electronic elements, but for now, I just want the grid array with a 5 conductor link (VCC/GND/DATA/CS/CLK) that I can connect using I2C to whatever microcontroller.



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