FreeIO.org is currently running a poll to determine what sort of free hardware project the community would most like to see developed. At present the poll is leaning heavily towards robots. So I thought it would be worthwhile to do a quick survey of existing free/open hardware robot projects to see what there is to work with and improve on. There are a lot of FLOSS (Free/Libre Open Source Software) robotics projects out there too but this article will focus on hardware projects that are under free hardware licenses. See the FreeIO.org “about page” to learn more about the concepts of free / open hardware.
I’ve attempted to list the projects roughly in chronological order by the project’s creation date. To qualify for this list, a project needs several attributes: 1) it must be a complete mobile robot, not just part of a robot such as a manipulator arm 2) the hardware design documents (e.g. CAD files, schematics, etc) must be available under a free license (i.e. a license that protects the user’s basic freedoms – licenses with commercial-use restrictions are NOT free/open licenses, 3) at least one working robot must have been developed and demonstrated. Projects that are in the planning stages didn’t make the list as we’d like to see well-proven designs that have been well-tested in the real world.
Read on for the full list of free/open hardware robot designs!
The TED Blog posted an interesting interview with Catarina Mota on open hardware. She talks about how she came to be involved with open hardware, why it’s a good thing for us be in control of our hardware, and why some people still see open source and open hardware as a bad thing. She also talks about hackerspaces and their contributions to the open source and open hardware communities.
Here’s a quick status update on the site. I’ve started revising the old resource pages, beginning with the Books and References page. Most of the books listed were out of print or old editions, so I’ve started replacing them with comparable books that are currently available. The list is pretty short at present, I’d love to get some input on recommended books you’d consider essential for an open hardware designer. Post a comment below and let me know what to add. Some CC or GFDL licensed ebooks would be really nice if anyone knows of any.
Also, I’ve put up a poll to get some input on what sort of Open Hardware project readers are most interested in seeing. This first poll is to find a general direction for a project and once we get enough input, I’ll put up another to narrow down some features. You can find the poll in the right column of page. If you haven’t picked an option yet, please do.
The PCWorld website posted an article about the open hardware Olimex OLinuXino single board computer. The article compares it to the Raspberry Pi, noting that the while Raspberry Pi hypes their board as open hardware, they have not released their CAD files or complete schematics yet and utilize components that are not available in small quantities. Olimex designed the OLinuXino board to address some of these concerns. All CAD files and complete schematics are available and they use an easy to find CPU. They use the Creative Commons Share-Alike license for all hardware and the GNU GPL license for all software associated with the OLinXino. The board uses a faster CPU than the Raspberry Pi and runs Android, debian, and other GNU/Linux distros. They also tout the board as being noise immune and working in industrial environments with a temperature range of -25 C to 85 C. The OLinuXino uses the standard nano-ITX form factor. The board is priced at 45 Euros (about $57). One point where we’d have to say the Raspberry Pi wins is on the name. It’s unclear how to pronounce OLinuXino, which can’t be good from a marketing standpoint.
So what about the actual specifications?
A13 Cortex A8 processor at 1GHz, 3D Mali400 GPU
512 MB RAM
6-16VDC input power supply, noise immune design
3 + 1 USB hosts, 3 available for users, 1 leads to onboard pinout
1 USB OTG which can power the board
SD-card connector for booting the Linux image
VGA video output
LCD signals available on connector so you still can use LCD if you diasble VGA/HDMI
RTC PCF8536 on board for real time clock and alarms
5 Keys on board for android navigation
UEXT connector for connecting addtional UEXT modules like Zigbee, Bluetooth, Relays, etc
GPIO connector with 68/74 pins and these signals:
17 for adding NAND flash;
22 for connecting LCDs;
20+4 including 8 GPIOs which can be input, output, interrupt sources;
Nathan Seidle of SparkFun gave an interesting talk at TEDxBoulder about the open hardware business model SparkFun has and offers it as a better model than the innovation-stifling models that rely on patents to suppress competition. It’s a great example of a successful business based on copyleft principles, showing that it’s possible to make money while still protecting the user’s freedoms.
Today marks the official relaunch of FreeIO.org’s website! When Marty founded the site back in March of 2000, he envisioned it as the center of a community interested in hardware freedom. He contributed to that community by developing some of the early free hardware designs and releasing them on this site under the GNU GPL. Marty’s designs were perhaps best know for his unique penchant of naming each board after a different breakfast treat.
Marty passed away on October 25, 2007. But before he lost his battle with pancreatic cancer, Marty passed on all his hardware prototypes, development gear, and this website to me. I’m Steve, better known as Steevithak online. I’ve kept Marty’s original FreeIO.org website intact and online since then, while I pondered what to do with it.
The time has come to get things rolling again and I’m starting with a relaunch of the website. Marty’s free hardware designs are still here and hopefully we’ll find volunteers to work on new hardware projects to add. I’ll also start updating the resource pages to make them more useful again. Meanwhile, I’ve decided to make the site more immediately useful by aggregating all the free hardware and open hardware news, so members of the open hardware community can have one central place to find out what’s going on.
We’re tracking news from the Open Source Hardware User Group, the Open Source Hardware Association, the Open Source Hardware and Design Alliance, and Open Collector. I’m also following blogs for major open source hardware projects like Arduino and Raspberry Pi. To round it out, we’ll have postings of general interest to hardware hackers such as application notes and new product releases from component vendors. If you can think of any cool free/open hardware blogs or news sources we should add, post a comment below. In fact, comments of any sort on how we can make the website more useful to the community are welcome.
I’ve started planning some site updates to hopefully get things rolling here again. We’ve made a good start by updating the site’s coding. This will likely be only an interim update until we sort out a new direction to take the website. Stay tuned! And, as always, suggestions are welcome.
Despite the lack of news updates lately, things are still slowly moving forward. I went through the site recently doing minor updates. I created a memorial page about Marty. I’m still looking for ideas about what the site should become and how we can best help the free hardware movement. I’m still looking for volunteers who’d like to work on free hardware projects. While I’m not much of an electronics engineer, I think I can improve the website itself and find new ways to use it to promote free hardware. As always, suggestions are welcome.
For those who weren’t aware, Marty passed away today. He made his last entry in his cancer blog on 25 Oct. Monica updated the blog on the 27th, saying “Diehl Martin passed away this morning at about 5:00, very quickly, in his beloved Monica’s arms.” I’ll continue to keep the FreeIO.org website online.
It’s been a while since the last update, so I thought I’d better let people know that we haven’t forgotten about freeio.org. Ed Paradis and I played with the Toast prototype boards for some time but finally concluded it was best to leave the Toast project in its deprecated state. We ran into some minor memory issues that Marty suggested could be due to a hardware bug. We also decided that the limited availability of the parts used in the design just make it impractical to continue working with. We’re contemplating what the next step should be. The idea of designing an inexpensive free microcontroller is still appealing. Suggestions are welcome.
Marty sent me a couple of boxes filled with FreeIO prototypes, documentation, and other goodies. As part of the process of evaluating which projects to focus on in the future, I’ve been looking at which project pages seem to get the most hits. Right now the Donut and Toast boards seem to be the most popular. Because of the interest in the Toast board, I’ve decided to take a look resurrecting the project from its deprecated status. I’ve passed one of the prototype boards along with a BDM cable and some other tools to Ed Paradis of the Dallas Personal Robotics Group. If we can verify that the prototype board boots linux, we’ll try to provide a kernel image and cross tool chain (and move the project back to active status). So far, Ed has been able to power up the board and communicate with it using the BDM cable. We’re currently trying to verify that we can read and write to the Flash memory. If anyone out there has any prior experience with a Toast board, either Marty’s prototype boards or one that you fabricated yourself, I’d love to hear from you. Meanwhile, you can keep up with Marty’s status by following the almost daily updates in his cancer blog.
Marty and I are in the process of transitioning FreeIO.org over to my care. I’m more of a software person than a hardware guru like Marty but I maintain a few other websites like robots.net, free3d.org, and the Dallas Personal Robotics Group so handling the website portion of things is right up my alley. Marty continues to have full access to the site and will continue to take part as much as he’s able. I don’t have any major changes in mind for the immediate future. My main goal is to make sure that Marty’s hardware designs continue to be freely available online. Beyond that, I have hopes that we can find volunteers to continue the work on some of the existing projects and maybe get a few new hardware projects started as well. I’m open to any suggestions and comments on the future direction of the website. firstname.lastname@example.org