Electrical

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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.

MAX7219

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!

baseConnector

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.

gridArray

http://www.thingiverse.com/thing:210015

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Before

This was the starting point.

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Bathroom panel

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More plumbing

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You can see the in-wall toilet tank here (TOTO).

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The small valve to the right of the red tank frame is a slow drip to the in-floor trap. This keeps the trap filled even when the floor drain isn’t often used. It will prevent bad odor from coming up through a dry trap.

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Raising the flagpole

Finally…

I’ve been waiting a long time to raise the flagpole and today is the day.

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Filling the walls

I’m the son of a farmer and although trained in engineering principles, I usually like to over-engineer things for additional strength.

Here we’re filling the walls with concrete to unite the bricks and reinforcing steel into a single structure.

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Top courses

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First courses

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