BAMF2014: Makesmith CNC

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Part of our continuing coverage of highlights from the 2014 Bay Area Maker Faire

Let’s file this under “intro machines.” The Makesmith CNC, currently available on Kickstarter for just $195 including everything but the Dremel tool. It makes very clever use of appropriate technology: Three tiny hobby servo motors, modified for continuous rotation, turn gears that turn the lead screws (well, all-thread) to drive the XYZ stage. An magnetic encoder monitors the rotation, making a high-resolution, closed-loop control system.  No bushings, melamine-coated MDF parts, Arduino control.  Planned for future open source hardware+software release, too.

Perfect?  Nope, but the creators of the project seem to be keenly aware of its abilities and limitations (many discussed here), and oh does it have affordability on its side.

OSHWA on Creative Commons and Open Source

CC licenses
Over at OSHWA.org (of which I am a board member), there’s a blog post about different Creative Commons license choices, and their implications for open source projects:

The reason is that there is not a single entity called the “Creative Commons license.” Rather, Creative Commons offers a number of different licenses that can apply some rights and protections to your work, including the CC-BY and CC-BY-SA licenses which reflect open source values closely. [...]

Creative Commons also offers licenses that carry restrictions — against commercial use and/or derivative works — that are strictly incompatible with open source. The open source hardware definition states that a license for open source hardware “[...] shall allow for the manufacture, sale, distribution, and use of products created from the design files, the design files themselves, and derivatives thereof.” Thus, if you choose to release hardware under the banner of “open source,” that means that you agree to allow others to use your design commercially, as well as to create derivative works (and to use them commercially). Consequently, you cannot advertise your project or product as “open source” if it carries restrictions against either of those uses.

Image CC-BY creativecommons.org.

Open Hardware Summit 2014: Call for papers

OHS
The Call for Papers is now open for the 2014 Open Hardware Summit. This year’s summit will be September 30 and October 1 in Rome, Italy.

The Open Hardware Summit is the annual conference organized by the Open Source Hardware Association and the world’s first comprehensive conference on open hardware; a venue to discuss and draw attention to the rapidly growing Open Source Hardware movement. Speakers include world renowned leaders from industry, academia, and the maker community. Talks cover a wide range of subjects from electronics and mechanics to related fields such as digital fabrication, fashion technology, self-quantification devices, and DIY bio. Workshops focus on, but are not limited to, education, manufacturing, design, business, and law.

The call is on a short schedule this year: Submissions are due by 25th of May 2014.

The Printr Egg Boogie Board Bot

Printer Egg Boogie Board Bot

Over at Thingiverse, user gkrangan posted this wacky contraption: A machine to write with a stylus on a Boogie Board e-writer, built from PrintrBot Simple frame components, along with EggBot electronics and the pen-holder.  It’s driven through the EggBot extensions for Inkscape.

I was initially taping an index card onto the print platform for testing purposes, but when I saw this Boogie Board at a toy store, it seemed like a perfect choice to be used as the writing surface. One can draw/write anything on it, and erase with a press of a button. Of course, it can still be removed and any other suitable surface can be taped or mounted on the print platform, as necessary.

Printer Egg Boogie Board Bot @ Thingiverse

OSHW Talk at 2014 Bay Area Maker Faire

Maker Faire 2014
Wearing my OSHWA hat, I’ll be giving a talk about Open Source Hardware at this year’s Bay Area Maker Faire:

Best Practices for Open Source Hardware in 2014
In the past year OSHWA, the Open Source Hardware Association, has worked with the community to develop a modern list of best practices for designing, releasing and building upon existing open source hardware projects. Windell Oskay, Vice President of OSHWA, will discuss recommended approaches, touching upon open source design tools, documentation, hosting, licenses, and other current issues. Time permitting, we will also take questions from the audience.

The talk is scheduled for Saturday, May 17, 4:45-5:00 pm. You can find the rest of the center stage schedule for Maker Faire right here.

Simple Relay Shield v 2.0

relay shield

A minor bump for one of our little open source Arduino add-ons. The Simple Relay Shield is an easy to use single-relay board that does one thing, and does it well: It adds a beefy little mechanical relay to an Arduino, which you control through pin Digital 4.

relay shield

Version 2.0 adds the ability — by popular request — to control it from a pin other than D4. Solder the jumper in the normal way (in location JP), and it works on pin D4. Hook it up to any other digital pin, say to D7, and now you have a relay on that pin. The Simple Relay Shield is available as a complete soldering kit or as a bare PCB, and you can find documentation on our wiki.

Open Source Beehives

The Open Source Beehives project is currently running a crowdfunding campaign with the goal of gathering information from sensor equipped hives throughout the world to help solve bee population problems like colony collapse syndrome. The sensors can also be used by individual beekeepers to monitor the health of their hive.

Even without the sensors and the citizen science, their hive designs are beautiful.

Basics: AVR Target Boards and Arduino Compatibility

Diavolino
Gary writes:

I have fallen in love with your Diavolinos – thank you!
My question: does the “Simple target board” allow for the 6-pin FTDI Friend hookup to upload sketches? This is quick and easy with the Diavolino. I’m new to reading circuits and stuff, and I cannot tell looking at the target board. It says to use in-system programmer, but I prefer to not buy another interface. Thanks!

Excellent question! It is certainly possible, but not as quick and easy.  Both the Diavolino and our ATmegaXX8 target boards boards use the same chip, usually the ATmega328P.  But, one might say that our ATmegaXX8 board is a simple AVR target board optimized for use with an AVR ISP programmer (like the USBtinyISP), whereas the Diavolino is a simple target board optimized for use with the FTDI interface.

XX8 Target Board

Versus a “bare” target board (with just the chip and power), there are four things that you would normally add, in order to use the FTDI interface to upload a sketch from within the Arduino environment:

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MakerBeam Comes of Age

makerbeam pieces

Back in 2009, we helped support the launch on Kickstarter of MakerBeam, a miniature open source aluminum T-slot profile construction set. Just a few months later, we wrote about receiving our first batch of MakerBeam parts.  And while there were some good things that might be said about those first-batch parts, there were some not-so-good things as well. For example, custom screws that couldn’t really be tightened and fastening plates made of too-brittle plastic. With some improvement — stainless steel brackets — MakerBeam eventually found limited distribution in 2011 at Sparkfun in the USA and at MakerBeam.eu, but on the whole, it seemed to be fizzling out of existence.

But, things change, sometimes for the better.  In 2012, Terence Tam’s excellent OpenBeam (a slightly larger T-slot profile, also currently sold by MakerBeam.eu) came roaring out of the gate, reminding us of what great things one can build out of extrusion profiles.  Meanwhile, the folks from MakerBeam.eu took hold of MakerBeam and began to run with it — turning a languishing project into an open source hardware success story. They recently sent us a starter kit to review, and we have to say— we were blown away.

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To begin with, they redesigned the profile itself.  The basic proportions are still the same (10 mm across), but the new shape has a thicker solid core that improves strength, and now allows the ends to be tapped. (The hole does not go all the way through.)  They also started having their profiles anodized, providing a harder outer surface, and tapping the ends.

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Next up: Nicely made stainless steel angle brackets and fastening plates.  Rock solid when bolted down, although (things being small) you may need to use several of them to get the kind of rigidity that you need for certain applications. We already had some of these shapes from the original MakerBeam makers.

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Silly: Some of the fastening plates (the ones designed by the original MakerBeam team) are inscribed with the angle in fractions of Tau, as in τ/4 instead of 90°.  Our guess: it’s certain to please many fewer people than it annoys.

 

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And, most important: A fastening system that really works.  These stainless steel M3 screws with modified pyramid-shaped button socket cap heads are simply fantastic.  They slide easily into and out of the MakerBeam slots, and lock into place perfectly with a simple hex nut on the exterior.

There are arguments to be said for and against putting screw heads in the channels, but if you’re going to do it, you had damn well better do it right. And, finally, someone is doing it right.  You can read about the evolution of the fasteners on the MakerBeam.eu blog, here, here, here, here, and here.

 

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Old components, Left side:  MakerBeam profile 1.0, old-style screws, machined ABS fastening plate.
New components, Right side: MakerBeam profile 2.0, new screws, stainless steel fastening plates.

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So, after nearly five years, MakerBeam has come of age, and finally fulfilled its promise of being a really nice miniature construction set.  Our congratulations and thanks to MakerBeam.eu for doing such a great job of this, and especially for making these sets available for everyone else.