CNC Circuit Playground Holder

I decided I needed a Circuit Playground and Circuit Playground Express render farm. Here’s the stand I made on the CNC machine.

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I designed it in Fusion 360 and then milled it with the Othermill Pro.cpFarm_IMG_2511 First, I ran a pocket clearing pass.

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Next, I ran a pencil pass to clear out the scooped out slots for the curvature of the boards.
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These rough passes left behind a bit of material, as you can see here.
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The final cleanup was a parallel pass with a fairly tight stepover, I ran it at 90 degrees from the stock, so it followed the grooves and had longer runs.
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Here it is with a Circuit Playground Express nestled in it lovingly.

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Here you’ll see some purple prototype boards, and the new red Circuit Playground Classic Digi-Key will be selling as part of the “buy one , give one” donation program for Girls Who Code
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Here’s the full set, ready for various tutorials I’m working on with MakeCode, Arduino, and Circuit Python!
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CNC bench on wheels



I got this nice little bench from a picker I know. I try to put everything in my shop on casters, but didn’t want to spend too much, so here’s a set of old casters I got for $5 being hacked into a pice of plywood.



 I cut out some footholds from scrap on the bandsaw.


Coffee & Tool & Coffee Tool of the Day

Today I’m featuring an electrician’s Leatherman, the E4 Squirt, and a Modern Times (beer brewer/coffee roaster from San Diego) Black House coffee brewed in a Bialetti moka pot my mom gave me. (I think it was from my Zia Wanda’s kitchen in Cassino, Italy.)

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I really like the E4 because it’s got a good set of wire strippers/cutters on it, and the Philips screwdriver is a pretty nice one. I keep it in my jeans coin pocket.

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Welding a Welder Holder to a Welding Cart

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I have this great little welding cart I got from a picker. The size was almost — but not quite — perfect to hold my little MIG welder underneath. I got 10′ of 1/2″ 16 gauge steel square tubing for $2.06 at Industrial Metal Supply’s remainders bin and cut two lengths down to size to fit the footprint of the welder.  I welded them to the cart and now it’s all neatly contained.

Arduino GRANDE Tutorial

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I love Arduino! But the boards are so tiny that they can be difficult to hug. And not so easy to see, either, if you’re a student sitting at the back of a classroom. So why not solve both problems by building a really huge, fully-functioning Arduino that’s six times larger than real life?

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By popular demand, I finally put together a tutorial for building your own not-so-micro microcontroller:

https://www.instructables.com/id/Arduino-GRANDE-the-Huge-Microcontroller/?ALLSTEPS