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TEDxBoulder - Nathan Seidle - How Open Hardware will Take Over the World
TEDxBoulder - Nathan Seidle - How Open Hardware will Take Over the World
Published: 2013/01/10
Channel: SparkFun Electronics
Open Source Hardware Explained - EEVblog #195
Open Source Hardware Explained - EEVblog #195
Published: 2011/08/11
Channel: EEVblog
What Is Open Source Hardware?
What Is Open Source Hardware?
Published: 2012/10/02
Channel: OpenSourceHardware
How to Make Money with Open Source Hardware - Ubuntu
How to Make Money with Open Source Hardware - Ubuntu
Published: 2016/07/06
Channel: Hardware Pioneers
EEVblog #921 - Open Source Hardware Problems Solved!
EEVblog #921 - Open Source Hardware Problems Solved!
Published: 2016/09/09
Channel: EEVblog
Open source hardware sparks innovation: Nathan Seidle at Summit 2016
Open source hardware sparks innovation: Nathan Seidle at Summit 2016
Published: 2016/07/11
Channel: Red Hat Summit
How Open Hardware will Take Over the World: Nathan Seidle at TEDxBoulder
How Open Hardware will Take Over the World: Nathan Seidle at TEDxBoulder
Published: 2013/02/08
Channel: TEDx Talks
5 Cool Open-Source Projects To Design & Build Your Own Devices
5 Cool Open-Source Projects To Design & Build Your Own Devices
Published: 2016/11/18
Channel: Future Technologies
Revolution of the open hardware | Bram Geenen | TEDxMadrid
Revolution of the open hardware | Bram Geenen | TEDxMadrid
Published: 2015/10/01
Channel: TEDx Talks
TEDxBrussels - David Cuartielles - Open Source Hardware-
TEDxBrussels - David Cuartielles - Open Source Hardware-
Published: 2011/11/22
Channel: TEDx Talks
Open Source: Music Hardware Synthesizer (Supplyframe Original Series)
Open Source: Music Hardware Synthesizer (Supplyframe Original Series)
Published: 2016/09/06
Channel: Supplyframe
Novena: Open Source Hardware laptop
Novena: Open Source Hardware laptop
Published: 2014/06/12
Channel: Drew Fustini
IoT open source hardware platform, mangOH™ Red
IoT open source hardware platform, mangOH™ Red
Published: 2017/02/10
Channel: Sierra Wireless
Developing an Open Source Laptop
Developing an Open Source Laptop
Published: 2016/04/27
Channel: HACKADAY
IoT open source hardware platform, mangOH™  Green
IoT open source hardware platform, mangOH™ Green
Published: 2016/02/20
Channel: Sierra Wireless
Why open source hardware is(n
Why open source hardware is(n't) working | David Cuartielles
Published: 2016/08/19
Channel: RIAT Research Institute for Arts & Technology
Interviewing Bunnie about the Novena Open Hardware Laptop
Interviewing Bunnie about the Novena Open Hardware Laptop
Published: 2014/05/23
Channel: HACKADAY
How to Control Things Using Your Brain (and Open-Source Hardware) | Cyborg Nation
How to Control Things Using Your Brain (and Open-Source Hardware) | Cyborg Nation
Published: 2015/11/04
Channel: WIRED
What is Open Source Hardware ?
What is Open Source Hardware ?
Published: 2016/12/27
Channel: Tech Toons
The BrainCard Open Source hardware: Arduino & Raspberry Pi
The BrainCard Open Source hardware: Arduino & Raspberry Pi
Published: 2015/01/22
Channel: Future Ideas & Technology
Arduino Documentary Open Source Hardware is Here Open Cultur
Arduino Documentary Open Source Hardware is Here Open Cultur
Published: 2016/12/02
Channel: NowScience
Open Source PLC - Open Source Hardware Project
Open Source PLC - Open Source Hardware Project
Published: 2013/04/18
Channel: startingelectronics
Understanding HIGH and LOW Arduino Pin States :: Open Source Hardware Group Arduino Tutorials
Understanding HIGH and LOW Arduino Pin States :: Open Source Hardware Group Arduino Tutorials
Published: 2014/09/01
Channel: Programming Electronics Academy
WikiFab - Open Source Hardware Documentation
WikiFab - Open Source Hardware Documentation
Published: 2016/09/02
Channel: Marcin Jakubowski
VLTIMA project: low cost CNC (open-source hardware and software)
VLTIMA project: low cost CNC (open-source hardware and software)
Published: 2014/03/18
Channel: Albert Sàenz Coromina
Open Source Hardware - Car Building
Open Source Hardware - Car Building
Published: 2014/12/28
Channel: IntraOmega
BugLabs Open Source Hardware
BugLabs Open Source Hardware
Published: 2007/12/30
Channel: CappyTech
Macchina M2 is an OBD Open Source Hardware
Macchina M2 is an OBD Open Source Hardware
Published: 2017/03/11
Channel: iot-dev.net
Arduino et la domotique open source hardware
Arduino et la domotique open source hardware
Published: 2015/04/09
Channel: Openhardware Algerie
Tizen Laptop with Open Source Hardware Components
Tizen Laptop with Open Source Hardware Components
Published: 2014/05/26
Channel: Leon Anavi
libembroidery open source hardware demo
libembroidery open source hardware demo
Published: 2014/02/14
Channel: Embroidermodder
Open Source Hardware and Instructables.com
Open Source Hardware and Instructables.com
Published: 2007/10/09
Channel: GoogleTechTalks
2015 Open Source Hardware Summit
2015 Open Source Hardware Summit
Published: 2015/11/24
Channel: Adapteva
Door to Open Source Hardware
Door to Open Source Hardware
Published: 2013/11/19
Channel: 卢伟聪
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Published: 2016/01/18
Channel: Clément Flipo
EEVblog #586 - Open Source Hardware uARM 4-Axis Desktop Robotic Arm Kickstarter
EEVblog #586 - Open Source Hardware uARM 4-Axis Desktop Robotic Arm Kickstarter
Published: 2014/03/04
Channel: EEVblog
Can open source hardware licensing work? | Michael Weinberg
Can open source hardware licensing work? | Michael Weinberg
Published: 2016/08/19
Channel: RIAT Research Institute for Arts & Technology
What is OPEN-SOURCE HARDWARE? What does OPEN-SOURCE HARDWARE mean?
What is OPEN-SOURCE HARDWARE? What does OPEN-SOURCE HARDWARE mean?
Published: 2017/03/11
Channel: The Audiopedia
Kristen Clifton - duinoPRO - An open-source hardware platform for lean startups
Kristen Clifton - duinoPRO - An open-source hardware platform for lean startups
Published: 2015/11/19
Channel: Maker Faire Adelaide
Ikimo Open Source Hardware Robot
Ikimo Open Source Hardware Robot
Published: 2011/08/03
Channel: inmojotube
Open Source: Music Hardware Synthesizer Pt. 2 (Supplyframe Original Series)
Open Source: Music Hardware Synthesizer Pt. 2 (Supplyframe Original Series)
Published: 2016/10/11
Channel: Supplyframe
Open source hardware от България
Open source hardware от България
Published: 2013/11/09
Channel: LinuxZaBulgari
Open Source Hardware Development Method
Open Source Hardware Development Method
Published: 2015/02/23
Channel: Marcin Jakubowski
OSB 2015 - Open Source Tools of the Hardware Hacking Trade - Joe Grand
OSB 2015 - Open Source Tools of the Hardware Hacking Trade - Joe Grand
Published: 2015/09/11
Channel: StumptownSyndicate
Rebranding: Open Source Hardware Group is now Programming Electronics Academy
Rebranding: Open Source Hardware Group is now Programming Electronics Academy
Published: 2015/12/06
Channel: Programming Electronics Academy
An Open-Source Hardware/Software Architecture for Quadrotor UAVs
An Open-Source Hardware/Software Architecture for Quadrotor UAVs
Published: 2014/09/17
Channel: Riccardo Spica
Arduino, Open Source Hardware and Learning by Doing
Arduino, Open Source Hardware and Learning by Doing
Published: 2012/06/06
Channel: Nexa Center for Internet & Society
Rebel Technology: Open Source, Open Hardware
Rebel Technology: Open Source, Open Hardware
Published: 2015/12/06
Channel: sonicstate
What is Open Source Hardware?
What is Open Source Hardware?
Published: 2010/03/22
Channel: KnoxvilleRobots
Aladdin: Open Source Hardware Key to Your Online Security
Aladdin: Open Source Hardware Key to Your Online Security
Published: 2012/12/08
Channel: Alvin Chang
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WIKIPEDIA ARTICLE

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The "Open source hardware" logo proposed by OSHWA, one of the main defining organizations
The RepRap general-purpose 3D printer with the ability to make copies of most of its own structural parts

Open-source hardware (OSH), consists of physical artifacts of technology designed and offered by the open design movement. Both free and open-source software (FOSS) as well as open-source hardware is created by this open-source culture movement and applies a like concept to a variety of components. It is sometimes, thus, referred to as FOSH (free and open-source hardware). The term usually means that information about the hardware is easily discerned so that others can make it - coupling it closely to the maker movement.[1] Hardware design (i.e. mechanical drawings, schematics, bills of material, PCB layout data, HDL source code[2] and integrated circuit layout data), in addition to the software that drives the hardware, are all released under free/libre terms. The original sharer gains feedback and potentially improvements on the design from the FOSH community. There is now significant evidence that such sharing can drive a high return on investment for investors.[3]

Since the rise of reconfigurable programmable logic devices, sharing of logic designs has been a form of open-source hardware. Instead of the schematics, hardware description language (HDL) code is shared. HDL descriptions are commonly used to set up system-on-a-chip systems either in field-programmable gate arrays (FPGA) or directly in application-specific integrated circuit (ASIC) designs. HDL modules, when distributed, are called semiconductor intellectual property cores, or IP cores.

History[edit]

openhardware.org logo (2013)
OSHWA Logo.

The first hardware focused "open source" activities were started around 1997 by Bruce Perens, creator of the Open Source Definition, co-founder of the Open Source Initiative, and a ham radio operator. He launched the Open Hardware Certification Program, which had the goal of allowing hardware manufacturers to self-certify their products as open.[4][5]

Shortly after the launch of the Open Hardware Certification Program, David Freeman announced the Open Hardware Specification Project (OHSpec), another attempt at licensing hardware components whose interfaces are available publicly and of creating an entirely new computing platform as an alternative to proprietary computing systems.[6] In early 1999, Sepehr Kiani, Ryan Vallance and Samir Nayfeh joined efforts to apply the open source philosophy to machine design applications. Together they established the Open Design Foundation (ODF) as a non-profit corporation, and set out to develop an Open Design Definition. But most of these activities faded out after a few years.

By the mid 2000s open source hardware again became a hub of activity due to the emergence of several major open source hardware projects and companies, such as OpenCores, RepRap (3D printing), Arduino, Adafruit and SparkFun. In 2007, Perens reactivated the openhardware.org website.

Following the Open Graphics Project, an effort to design, implement, and manufacture a free and open 3D graphics chip set and reference graphics card, Timothy Miller suggested the creation of an organization to safeguard the interests of the Open Graphics Project community. Thus, Patrick McNamara founded the Open Hardware Foundation (OHF) in 2007.[7]

The Tucson Amateur Packet Radio Corporation (TAPR), founded in 1982 as a non-profit organization of amateur radio operators with the goals of supporting R&D efforts in the area of amateur digital communications, created in 2007 the first open hardware license, the TAPR Open Hardware License. The OSI president Eric S. Raymond expressed some concerns about certain aspects of the OHL and decided to not review the license.[8]

Around 2010 in context of the Freedom Defined project, the Open Hardware Definition was created as collaborative work of many[9] and is accepted as of 2016 by dozens of organizations and companies.[10]

In July 2011, CERN (European Organization for Nuclear Research) released an open source hardware license, CERN OHL. Javier Serrano, an engineer at CERN’s Beams Department and the founder of the Open Hardware Repository, explained: “By sharing designs openly, CERN expects to improve the quality of designs through peer review and to guarantee their users – including commercial companies – the freedom to study, modify and manufacture them, leading to better hardware and less duplication of efforts”.[11] While initially drafted to address CERN-specific concerns, such as tracing the impact of the organization’s research, in its current form it can be used by anyone developing open source hardware.[12]

Following the 2011 Open Hardware Summit, and after heated debates on licenses and what constitutes open source hardware, Bruce Perens abandoned the OSHW Definition and the concerted efforts of those involved with it.[13] Openhardware.org, led by Bruce Perens, promotes and identifies practices that meet all the combined requirements of the Open Source Hardware Definition, the Open Source Definition, and the Four Freedoms of the Free Software Foundation[14] Since 2014 openhardware.org is not online and seems to have ceased activity.[15]

The Open Source Hardware Association (OSHWA) at oshwa.org proposes Open source hardware and acts as hub of open source hardware activity of all genres, while cooperating with other entities such as TAPR, CERN, and OSI. The OSHWA was established as an organization in June 2012 in Delaware and filed for tax exemption status in July 2013.[16] After same debates about trademark interferences with the OSI, in 2012 the OSHWA and the OSI signed a co-existence agreement.[17][18]

In 2012, after years of skepticism on the relevance of free hardware designs,[19] the Free Software Foundation started the "Respects Your Freedom" (RYF) computer hardware product certification program. It was intended to encourage the creation and sale of hardware that respects users' freedom and privacy, and aims to ensure that users have control over their devices.[20][21] RYF certified laptops faced criticism on the basis of being slow and outdated hardware.[22][23]

FSF's Replicant project suggested in 2016 an alternative "free hardware" definition, derived from the FSF's four freedoms.[24]

Forms of open-source hardware[edit]

The term hardware in open source hardware has been historically used in opposition to the term software of open source software. That is, to refer to the electronic hardware on which the software runs (see previous section). However, as more and more non-electronic hardware products are made open source (for example Wikihouse, OpenBeam or Hovalin), this term tends to be used back in its broader sense of "physical product." Indeed, the field of open source hardware has been shown to go beyond electronic hardware and to cover a larger range of product categories such as machine tools, vehicles and medical equipment[25]. In that sense, hardware refers to any form of tangible product, may it be electronic hardware, mechanical hardware, textile or even construction hardware. The Open Source Hardware (OSHW) Definition 1.0 defines hardware as "tangible artifacts — machines, devices, or other physical things."[26]

Electronics[edit]

One of the most popular types of open-source hardware is electronics. There are numerous companies that provide large varieties of open-source electronics such as Sparkfun, Adafruit and Seeed. In addition, there are NPOs and companies that provide a specific open-source electronic component such as the Arduino electronics prototyping platform. There are numerous examples of speciality open-source electronics such as low-cost voltage and current GMAW open-source 3-D printer monitor[27][28] and a robotics-assisted mass spectrometry assay platform.[29][30] Open-source electronics finds various uses, including automation of chemical procedures.[31][32]

Mecha(tro)nics[edit]

A large range of products including mechanical components have been developed so far, from machine tools to vehicles over musical instruments and medical equipment.[25] Examples of machine-tools are the 3D printers RepRap and Ultimaker as well as the laser cutter Lasersaur. In the category vehicles, we can find bikes like XYZ Space Frame Vehicles and cars like the Tabby OSVehicle. Examples of medical equipment are the OpenBionics’ Prosthetic Hands or the echostethoscope echOpen.

Others[edit]

Examples of open-source hardware products can also be found to a lesser extent in construction (Wikihouse) and textile (Kit Zéro Kilomètres).

Licenses[edit]

Rather than creating a new license, some open-source hardware projects simply use existing, free and open-source software licenses.[33] These licenses may not accord well with patent law.[34]

Later, several new licenses have been proposed, designed to address issues specific to hardware designs.[35] In these licenses, many of the fundamental principles expressed in open-source software (OSS) licenses have been "ported" to their counterpart hardware projects. New hardware licenses are often explained as the "hardware equivalent" of a well-known OSS license, such as the GPL, LGPL, or BSD license.

Despite superficial similarities to software licenses, most hardware licenses are fundamentally different: by nature, they typically rely more heavily on patent law than on copyright law, as many hardware designs are not copyrightable.[36] Whereas a copyright license may control the distribution of the source code or design documents, a patent license may control the use and manufacturing of the physical device built from the design documents. This distinction is explicitly mentioned in the preamble of the TAPR Open Hardware License:

"... those who benefit from an OHL design may not bring lawsuits claiming that design infringes their patents or other intellectual property."

— TAPR Open Hardware License[37]

Noteworthy licenses include:

The Open Source Hardware Association recommends seven licenses which follow their open-source hardware definition.[42] From the general copyleft licenses the GNU General Public License (GPL) and Creative Commons Attribution-ShareAlike license, from the HW specific copyleft licenses the CERN Open Hardware License (OHL) and TAPR Open Hardware License (OHL) and from the permissive licenses the FreeBSD license, the MIT license, and the Creative Commons Attribution license.[43] Openhardware.org recommended in 2012 the TAPR Open Hardware License, Creative Commons BY-SA 3.0 and GPL 3.0 license.[44]

Organizations tend to rally around a shared license. For example, Opencores prefers the LGPL or a Modified BSD License,[45] FreeCores insists on the GPL,[46] Open Hardware Foundation promotes "copyleft" or other permissive licenses",[47] the Open Graphics Project us[48]es a variety of licenses, including the MIT license, GPL, and a proprietary license,[49] and the Balloon Project wrote their own license.[50]

Development[edit]

The OSHW (Open Source Hardware) logo silkscreened on an unpopulated PCB

The adjective "open-source" not only refers to a specific set of freedoms applying to a product, but also generally presupposes that the product is the object or the result of a "process that relies on the contributions of geographically dispersed developers via the Internet."[51] In practice however, in both fields of open-source hardware and open-source software, products may either be the result of a development process performed by a closed team in a private setting or by a community in a public environment, the first case being more frequent than the second which is more challenging[25]. Establishing a community-based product development process faces several challenges such as: to find appropriate product data management tools, document not only the product but also the development process itself, accepting losing ubiquitous control over the project, ensure continuity in a context of fickle participation of voluntary project members, among others.[52]

The Arduino Diecimila, another popular and early open source hardware design.

One of the major differences between developing open-source software and developing open-source hardware is that hardware results in tangible outputs, which cost money to prototype and manufacture. As a result, the phrase "free as in speech, not as in beer",[53] more formally known as Gratis versus Libre, distinguishes between the idea of zero cost and the freedom to use and modify information. While open-source hardware faces challenges in minimizing cost and reducing financial risks for individual project developers, some community members have proposed models to address these needs[54] Given this, there are initiatives to develop sustainable community funding mechanisms, such as the Open Source Hardware Central Bank.

Extensive discussion has taken place on ways to make open-source hardware as accessible as open-source software. Providing clear and detailed product documentation is an essential factor facilitating product replication and collaboration in hardware development projects. Practical guides have been developed to help practitioners to do so.[55][56] Another option is to design products so they are easy to replicate, as exemplified in the concept of open-source appropriate technology.[57]

The process of developing open-source hardware in a community-based setting is alternatively called open design, open source development[58] or open source product development[59]. All these terms are instantiations of the open-source model applicable for the development of any product, may it be software, hardware, cultural, educational, and so on. See here for a delineation of these terms.

A major contributor to the production of open-source hardware product designs is the scientific community. There has been considerable work to produce open-source hardware for scientific hardware using a combination of open-source electronics and 3-D printing.[60][61][62] Other sources of open-source hardware production are vendors of chips and other electronic components sponsoring contests with the provision that the participants and winners must share their designs. Circuit Cellar magazine organizes some of these contests.

Open-source labs[edit]

A guide has been published (Open-Source Lab (book) by Joshua Pearce) on using open-source electronics and 3D printing to make open-source labs. Today scientists are creating many such labs, examples include:

Business models[edit]

Open hardware companies are experimenting with different business models.[65] In one example, littleBits implements open-source business models by making the design files available for the circuit designs in each littleBits module, in accordance with the CERN Open Hardware License Version 1.2.[66] In another example, Arduino has registered its name as a trademark. Others may manufacture their designs but can't put the Arduino name on them. Thus they can distinguish their products from others by appellation.[67] There are many applicable business models for implementing some open-source hardware even in traditional firms. For example, to accelerate development and technical innovation the photovoltaic industry has experimented with partnerships, franchises, secondary supplier and completely open-source models.[68]

Recently, many open source hardware projects were funded via crowdfunding on Indiegogo or Kickstarter. Especially popular is Crowd Supply for crowdfunding open hardware projects.[69]

Reception and impact[edit]

Cover for "Open-Source Lab" by Joshua M. Pearce (2014).

Richard Stallman, the founder of the Free Software movement, was in 1999 skeptical on the idea and relevance of Free hardware (his terminology what is now known as open-source hardware).[70] In a 2015 Wired article he adapted his point of view slightly; while he still sees no ethical parallel between free software and free hardware, he acknowledges the importance.[71] Also, Stallman uses and suggest the term free hardware design over open source hardware, a request which is consistent with his earlier rejection of the term open source software (see also Alternative terms for free software).[71]

Other authors, such as Joshua Pearce have argued there is an ethical imperative for open-source hardware – specifically with respect open-source appropriate technology for sustainable development.[72] In 2014, he also wrote the book Open-Source Lab: How to Build Your Own Hardware and Reduce Research Costs, which details the development of free and open-source hardware primarily for scientists and university faculty.[73][74]

Find open-source hardware products[edit]

Some ongoing initiatives provide indexes of open-source hardware products for different purposes:

See also[edit]

References[edit]

  1. ^ Alicia Gibb (Ed.) Building Open Source Hardware: DIY Manufacturing for Hackers and Makers, Addison-Wesley: New York, pp. 253-277 (2015).
  2. ^ "Free Hardware and Free Hardware Designs". Free Software Foundation Inc. 
  3. ^ Joshua M. Pearce. (2014)Return on Investment for Open Source Hardware Development. Science and Public Policy. DOI:10.1093/scipol/scv034 open access
  4. ^ Perens, B. 1997. Announcing: The Open Hardware Certification Program. Debian Announce List. [1].
  5. ^ The Open Hardware Certification Program on openhardware.org (November 1998)
  6. ^ Freeman, D. 1998. OHSpec: The Open Hardware Specification Project
  7. ^ McNamara, P. 2007a. “Open Hardware.” The Open Source Business Resource (September 2007: Defining Open Source). [2]
  8. ^ a b Ars Technica: TAPR introduces open-source hardware license, OSI skeptical.
  9. ^ Freedom Defined. 2011. Open Source Hardware Definition. Freedom Defined. [3]
  10. ^ OSHW
  11. ^ CERN. 2011. CERN launches Open Hardware initiative. CERN
  12. ^ Ayass, M. 2011. CERN’s Open Hardware License
  13. ^ Bruce Perens, 2011a. Promoting Open Hardware. http://lists.openhardwaresummit.org/pipermail/updates-openhardwaresummit.org/2011-September/000565.html.
  14. ^ Bruce Perens. 2011b. Open Hardware – Constitution. Open Hardware. http://wiki.openhardware.org/Project:Constitution.
  15. ^ You've reached a web site owned by Perens LLC on openhardware.org
  16. ^ brief-history-of-open-source-hardware-organizations-and-definitions on OSHWA.org
  17. ^ An Important Question on the Open Source Hardware Mark on oshwa.org (August 2012)
  18. ^ co-existence on oshwa.org (October 2012)
  19. ^ Richard Stallman -- On "Free Hardware" on linuxtoday.com "I see no social imperative for free hardware designs like the imperative for free software." (Jun 22, 1999)
  20. ^ "Respects Your Freedom hardware product certification". fsf.org. 
  21. ^ The Free Software Foundation loves this laptop, but you won't on PC World by Chris Hoffman (on Feb 5, 2015)
  22. ^ The Free Software Foundation loves this laptop, but you won't by Chris Hoffman on PCWorld "Sadly, the FSF’s endorsement of these laptops is irrelevant to most of our lives." (Feb 5, 2015)
  23. ^ EOMA68: The Campaign (and some remarks about recurring criticisms) on fsfe.org (August 18th, 2016)
  24. ^ Replicant - Freedom and privacy/security issues [online]. (2016). Available from: <http://www.replicant.us/freedom-privacy-security-issues.php>. (Accessed 02/22/2016) "The freedom to use the hardware, for any purpose. The freedom to study how the hardware works, and change it so it works as you wish. Access to the hardware design source is a precondition for this. The freedom to redistribute copies of the hardware and its design so you can help your neighbor. The freedom to distribute copies of your modified versions to others. By doing this you can give the whole community a chance to benefit from your changes. Access to the hardware design source is a precondition for this".
  25. ^ a b c Bonvoisin, Jérémy; Mies, Robert; Boujut, Jean-François; Stark, Rainer (2017-09-05). "What is the “Source” of Open Source Hardware?". Journal of Open Hardware. 1 (1). ISSN 2514-1708. doi:10.5334/joh.7. 
  26. ^ "Open Source Hardware (OSHW) Definition 1.0". Open Source Hardware Association. 
  27. ^ A. Pinar, B. Wijnen, G. C. Anzalone, T. C. Havens, P. G. Sanders, J. M. Pearce. Low-cost Open-Source Voltage and Current Monitor for Gas Metal Arc Weld 3-D Printing. Journal of Sensors Vol. 2015, Article ID 876714, 8 pages, 2015. doi:10.1155/2015/876714
  28. ^ Yuenyong Nilsiam, Amberlee Haselhuhn, Bas Wijnen, Paul Sanders, & Joshua M. Pearce. Integrated Voltage - Current Monitoring and Control of Gas Metal Arc Weld Magnetic Ball-Jointed Open Source 3-D Printer. Machines 3(4), 339–351 (2015). doi:10.3390/machines3040339
  29. ^ Chiu, S. H. and Urban, P. L., 2015. Robotics-assisted mass spectrometry assay platform enabled by open-source electronics. Biosensors and Bioelectronics, 64, p. 260–268.
  30. ^ Chen C.-L., Chen T.-R., Chiu S.-H., and Urban P.L., 2017. Dual robotic arm “production line” mass spectrometry assay guided by multiple Arduino-type microcontrollers. Sensors and Actuators B: Chemical 239, p. 608-616.
  31. ^ Urban P.L. 2015, Universal electronics for miniature and automated chemical assays. Analyst 140, p. 963-975.
  32. ^ Prabhu G.R.D. and Urban P.L. 2017, The dawn of unmanned analytical laboratories. Trends in Analytical Chemistry 88, p. 41-52.
  33. ^ From OpenCollector's "License Zone" Archived 2008-12-05 at the Wayback Machine.: GPL used by Free Model Foundry and OpenSPARC; other licenses are used by Free-IP Project, LART (the software is released under the terms of the GNU General Public License (GPL), and the Hardware design is released under the MIT License), GNUBook (defunct).
  34. ^ Thompson, C. (2011). Build it. Share it. Profit. Can open source hardware work?. Work, 10, 08.
  35. ^ For a nearly comprehensive list of licenses, see OpenCollector's "license zone" Archived 2008-12-05 at the Wayback Machine.
  36. ^ Hardware_Isn't_Generally_Copyrightable on openhardware.org
  37. ^ "The TAPR Open Hardware License". Retrieved 16 April 2015. 
  38. ^ transcript of all comments Archived 2008-05-18 at the Wayback Machine., hosted on technocrat.net
  39. ^ "CERN Open Hardware Licence". Open Hardware Repository. CERN. 2012-07-05. Retrieved 2012-08-15. 
  40. ^ "Open Hardware Repository". Retrieved 16 April 2015. 
  41. ^ "Solderpad licenses". Solderpad.org. Retrieved 2012-08-15. 
  42. ^ Definition on oshwa.org
  43. ^ FAQ on oshwa.org "What license should I use? In general, there are two broad classes of open-source licenses: copyleft and permissive. Copyleft licenses (also referred to as “share-alike” or “viral”) are those which require derivative works to be released under the same license as the original; common copyleft licenses include the GNU General Public License (GPL) and the Creative Commons Attribution-ShareAlike license. Other copyleft licenses have been specifically designed for hardware; they include the CERN Open Hardware License (OHL) and the TAPR Open Hardware License (OHL). Permissive licenses are those which allow for proprietary (closed) derivatives; they include the FreeBSD license, the MIT license, and the Creative Commons Attribution license. Licenses that prevent commercial use are not compatible with open-source; see this question for more."
  44. ^ https://web.archive.org/web/20120328013824/http://wiki.openhardware.org/Recommended_Licenses
  45. ^ Item "What license is used for OpenCores?", from Opencores.org FAQ, retrieved 14 January 2013
  46. ^ FreeCores Main Page Archived 2008-12-05 at the Wayback Machine., retrieved 25 November 2008
  47. ^ Open Hardware Foundation, main page, retrieved 25 November 2008
  48. ^ "The Open Source Hardware Bank | Make:". Make: DIY Projects and Ideas for Makers. 2009-03-05. Retrieved 2017-09-09. 
  49. ^ See "Are we going to get the 'source' for what is on the FPGA also?" in the Open Graphics Project FAQ Archived 2008-08-18 at the Wayback Machine., retrieved 25 November 2008
  50. ^ Balloon License Archived 2008-10-19 at the Wayback Machine., from balloonboard.org
  51. ^ Gacek, C.; Arief, B. (January 2004). "The many meanings of open source". IEEE Software. 21 (1): 34–40. ISSN 0740-7459. doi:10.1109/MS.2004.1259206. 
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