In 1817, a German inventor named Karl von Drais built a strange two-wheeled wooden contraption to get across the grounds of a royal garden faster. He called it a draisine. It had no pedals, no gears, no rubber you pushed it along with your feet like a scooter. It wasn't a great bicycle. It wasn't even really a good one.
But it was shareable. Over the following two centuries, thousands of hands touched that basic idea adding pedals, then chains, then gears, then pneumatic tires until it became the bicycle that 1.4 billion people ride today. Nobody owned the concept. Everybody improved it. That's the entire philosophy of open source hardware in one two-hundred-year story, and it's a philosophy every product designer can borrow from whether or not you ever publish a schematic.
What "Open Source Hardware" Actually Means
The Open Source Hardware Association (OSHWA) defines it plainly: it's hardware whose design is made public enough that anyone can study it, modify it, distribute it, manufacture it, and even sell it. The key phrase is the design, not just the device. A product is open source hardware only when its "source" — the CAD files, schematics, board layouts, firmware, bill of materials, whatever a person would actually need to recreate or modify the thing is released in a usable, non-obfuscated format.
That last part matters more than people expect. A company that publishes a glossy PDF of a finished circuit board hasn't open-sourced anything, any more than a software company handing out compiled binaries has open-sourced its code. The test OSHWA applies is simple: could someone actually make changes with what you've given them? If the answer is no, the documentation is decorative, not open.
The Design Principles Behind It
OSHWA's Statement of Principles reads like a checklist, but each item is really a design philosophy in disguise:
Design for modification, not just replication. Release files in editable, native formats not intermediate outputs like finished gerber artwork that can be read but not meaningfully changed. If your design tool produces something a stranger could open and immediately start tweaking, you've done it right.
Design with commodity parts. Ideal open hardware favors readily available components, standard manufacturing processes, and open infrastructure. Beyond the openness rationale, this is also a reasonable general design habit: a product built entirely on exotic, single-source parts carries more supply-chain risk than one built around commonly available components a consideration worth weighing whether or not you ever open-source anything.
Decouple hardware from proprietary lock-in. If your device needs software to function, the interfaces should be documented well enough that someone could write compatible software from scratch, or the necessary software should itself be open. Applied more broadly, this is a lesson about designing systems with legible interfaces rather than hidden dependencies future you, six months from now debugging your own product, will thank you.
Let derivatives happen, and design for them. The license terms exist specifically to allow forks, remixes, and resale of modified versions. A designer thinking this way builds products anticipating that someone, somewhere, will want a version with a different form factor or an added feature and structures the design so that's actually possible, rather than fighting it.
The Arduino Effect
The clearest real-world demonstration of what open design enables is the Arduino microcontroller. Because its board designs and schematics were released openly, an enormous ecosystem of derivatives grew up around it smaller versions, wearable and sewable versions, versions with extra motor drivers, versions tuned for specific hobbies the original team never anticipated.
The interesting part isn't just that people copied Arduino it's the range of what got built: derivatives with extra motor drivers, sewable versions for wearables, joystick variants, tiny form factors for embedded projects. OSHWA's own account of this is more of an impression than a hard finding: the sense that some people who first encountered a derivative eventually went looking for the original too. That's a plausible dynamic, not a documented outcome, so it's worth holding loosely. What's less speculative is the more basic point: a company can't anticipate every use case its users will invent, and an open design lets a community fill in that long tail without the original team having to build or predict all of it themselves.
A Business Model That Isn't Complicated
There's a persistent myth that open hardware means giving your business away. It doesn't. As one industry figure quoted by OSHWA put it, the business model for open hardware is refreshingly unglamorous: buy parts, assemble them, sell the finished product for more than it cost you to make. The design being public doesn't stop you from being the best, fastest, or most trusted source for the physical object itself.
This connects to a genuinely useful reframe for any product designer, open source or not: customers rarely buy things because of the intellectual property behind them. They buy for features, price, shipping speed, customer service, build quality, and brand trust. Patents and proprietary secrecy protect a company's competitive position, but they are almost never the reason someone clicks "buy." If you're designing a product and weighing how much to lock down versus how much to open up, it's worth asking honestly: is secrecy actually protecting your sales, or just protecting your assumptions about what protects your sales?
Why Openness Can Accelerate Innovation
There's a pattern that shows up whenever a previously closed hardware category opens up: when a wave of 3D-printing patents expired, the hobbyist and commercial 3D-printing world exploded with new designs almost overnight, as companies and individuals suddenly competed openly on the same playing field. Innovation didn't slow down when the moat disappeared it sped up, because more people could build on the same foundation instead of re-deriving it from scratch.
That's the underlying design lesson: closed systems protect what already exists; open systems accelerate what comes next. If you're designing something meant to become a platform other people build on top of — rather than a single finished product — openness isn't a concession, it's the feature.
Practical Ways to Apply This, Even If You Never "Go Open Source"
You don't have to release your product's design files to the world to design like an open-hardware practitioner. A few habits are worth adopting regardless:
- Document as you design, not after. OSHWA's certification process requires clean, complete documentation schematics, CAD files, bills of materials, assembly instructions because incomplete documentation isn't really documentation. Building this habit internally, even for a closed product, makes your own team faster and your onboarding easier.
- Favor standard components over proprietary ones wherever performance allows it, to keep your supply chain flexible.
- Design modular, well-documented interfaces between subsystems, so that a part can be swapped, upgraded, or handed to a new engineer without having to reverse-engineer past decisions.
- Consider what you actually need to protect. Not every part of a product needs the same level of secrecy. OSHWA's own guidance is explicit that a design can mix open and closed parts you're not expected to open-source every component, only to be clear about which parts you are and aren't releasing.
- Think about provenance. Open hardware licenses typically require attribution, which creates a visible lineage from a project to its derivatives. The same instinct keeping a record of what was inherited from what, and why a decision was made is a reasonable habit for internal documentation too, even on a fully closed product.
The Honest Limitations
Openness has real limits, and OSHWA is candid about them. Hardware, unlike software, almost always depends on some components that aren't themselves open a chip from a manufacturer that doesn't publish its internal design, for instance. That's fine. The standard isn't that every atom in a product must be open source; it's that the parts you produce and control should be released with real, honest intent to be open, and that other people should still be able to source the closed components you relied on.
That's a useful permission slip for designers, too. You don't have to solve every problem in the most philosophically pure way to benefit from open-design thinking. Adopting the parts of this philosophy that fit your product better documentation, modular interfaces, commodity components, designing for the modifications you can't predict — captures most of the value even if you never publish a single file.
The Bigger Picture
What ties all of this together is a simple bet: that many minds, working on a shared foundation, will find better and faster solutions than any single closed team working alone. The bicycle didn't become useful because one inventor perfected it in isolation it became useful because thousands of people, over two centuries, were free to take a mediocre wooden frame and keep making it better.
Whether you're designing a consumer gadget, a piece of lab equipment, or a component that will live inside someone else's product, the open source hardware movement offers a genuinely different design question to ask at the start of a project: not just "how do I build this?" but "how do I build this so that improving it isn't a privilege I have to grant, but a capability that's simply built in?"
But it was shareable. Over the following two centuries, thousands of hands touched that basic idea adding pedals, then chains, then gears, then pneumatic tires until it became the bicycle that 1.4 billion people ride today. Nobody owned the concept. Everybody improved it. That's the entire philosophy of open source hardware in one two-hundred-year story, and it's a philosophy every product designer can borrow from whether or not you ever publish a schematic.
What "Open Source Hardware" Actually Means
The Open Source Hardware Association (OSHWA) defines it plainly: it's hardware whose design is made public enough that anyone can study it, modify it, distribute it, manufacture it, and even sell it. The key phrase is the design, not just the device. A product is open source hardware only when its "source" — the CAD files, schematics, board layouts, firmware, bill of materials, whatever a person would actually need to recreate or modify the thing is released in a usable, non-obfuscated format.
That last part matters more than people expect. A company that publishes a glossy PDF of a finished circuit board hasn't open-sourced anything, any more than a software company handing out compiled binaries has open-sourced its code. The test OSHWA applies is simple: could someone actually make changes with what you've given them? If the answer is no, the documentation is decorative, not open.
The Design Principles Behind It
OSHWA's Statement of Principles reads like a checklist, but each item is really a design philosophy in disguise:
Design for modification, not just replication. Release files in editable, native formats not intermediate outputs like finished gerber artwork that can be read but not meaningfully changed. If your design tool produces something a stranger could open and immediately start tweaking, you've done it right.
Design with commodity parts. Ideal open hardware favors readily available components, standard manufacturing processes, and open infrastructure. Beyond the openness rationale, this is also a reasonable general design habit: a product built entirely on exotic, single-source parts carries more supply-chain risk than one built around commonly available components a consideration worth weighing whether or not you ever open-source anything.
Decouple hardware from proprietary lock-in. If your device needs software to function, the interfaces should be documented well enough that someone could write compatible software from scratch, or the necessary software should itself be open. Applied more broadly, this is a lesson about designing systems with legible interfaces rather than hidden dependencies future you, six months from now debugging your own product, will thank you.
Let derivatives happen, and design for them. The license terms exist specifically to allow forks, remixes, and resale of modified versions. A designer thinking this way builds products anticipating that someone, somewhere, will want a version with a different form factor or an added feature and structures the design so that's actually possible, rather than fighting it.
The Arduino Effect
The clearest real-world demonstration of what open design enables is the Arduino microcontroller. Because its board designs and schematics were released openly, an enormous ecosystem of derivatives grew up around it smaller versions, wearable and sewable versions, versions with extra motor drivers, versions tuned for specific hobbies the original team never anticipated.
The interesting part isn't just that people copied Arduino it's the range of what got built: derivatives with extra motor drivers, sewable versions for wearables, joystick variants, tiny form factors for embedded projects. OSHWA's own account of this is more of an impression than a hard finding: the sense that some people who first encountered a derivative eventually went looking for the original too. That's a plausible dynamic, not a documented outcome, so it's worth holding loosely. What's less speculative is the more basic point: a company can't anticipate every use case its users will invent, and an open design lets a community fill in that long tail without the original team having to build or predict all of it themselves.
A Business Model That Isn't Complicated
There's a persistent myth that open hardware means giving your business away. It doesn't. As one industry figure quoted by OSHWA put it, the business model for open hardware is refreshingly unglamorous: buy parts, assemble them, sell the finished product for more than it cost you to make. The design being public doesn't stop you from being the best, fastest, or most trusted source for the physical object itself.
This connects to a genuinely useful reframe for any product designer, open source or not: customers rarely buy things because of the intellectual property behind them. They buy for features, price, shipping speed, customer service, build quality, and brand trust. Patents and proprietary secrecy protect a company's competitive position, but they are almost never the reason someone clicks "buy." If you're designing a product and weighing how much to lock down versus how much to open up, it's worth asking honestly: is secrecy actually protecting your sales, or just protecting your assumptions about what protects your sales?
Why Openness Can Accelerate Innovation
There's a pattern that shows up whenever a previously closed hardware category opens up: when a wave of 3D-printing patents expired, the hobbyist and commercial 3D-printing world exploded with new designs almost overnight, as companies and individuals suddenly competed openly on the same playing field. Innovation didn't slow down when the moat disappeared it sped up, because more people could build on the same foundation instead of re-deriving it from scratch.
That's the underlying design lesson: closed systems protect what already exists; open systems accelerate what comes next. If you're designing something meant to become a platform other people build on top of — rather than a single finished product — openness isn't a concession, it's the feature.
Practical Ways to Apply This, Even If You Never "Go Open Source"
You don't have to release your product's design files to the world to design like an open-hardware practitioner. A few habits are worth adopting regardless:
- Document as you design, not after. OSHWA's certification process requires clean, complete documentation schematics, CAD files, bills of materials, assembly instructions because incomplete documentation isn't really documentation. Building this habit internally, even for a closed product, makes your own team faster and your onboarding easier.
- Favor standard components over proprietary ones wherever performance allows it, to keep your supply chain flexible.
- Design modular, well-documented interfaces between subsystems, so that a part can be swapped, upgraded, or handed to a new engineer without having to reverse-engineer past decisions.
- Consider what you actually need to protect. Not every part of a product needs the same level of secrecy. OSHWA's own guidance is explicit that a design can mix open and closed parts you're not expected to open-source every component, only to be clear about which parts you are and aren't releasing.
- Think about provenance. Open hardware licenses typically require attribution, which creates a visible lineage from a project to its derivatives. The same instinct keeping a record of what was inherited from what, and why a decision was made is a reasonable habit for internal documentation too, even on a fully closed product.
The Honest Limitations
Openness has real limits, and OSHWA is candid about them. Hardware, unlike software, almost always depends on some components that aren't themselves open a chip from a manufacturer that doesn't publish its internal design, for instance. That's fine. The standard isn't that every atom in a product must be open source; it's that the parts you produce and control should be released with real, honest intent to be open, and that other people should still be able to source the closed components you relied on.
That's a useful permission slip for designers, too. You don't have to solve every problem in the most philosophically pure way to benefit from open-design thinking. Adopting the parts of this philosophy that fit your product better documentation, modular interfaces, commodity components, designing for the modifications you can't predict — captures most of the value even if you never publish a single file.
The Bigger Picture
What ties all of this together is a simple bet: that many minds, working on a shared foundation, will find better and faster solutions than any single closed team working alone. The bicycle didn't become useful because one inventor perfected it in isolation it became useful because thousands of people, over two centuries, were free to take a mediocre wooden frame and keep making it better.
Whether you're designing a consumer gadget, a piece of lab equipment, or a component that will live inside someone else's product, the open source hardware movement offers a genuinely different design question to ask at the start of a project: not just "how do I build this?" but "how do I build this so that improving it isn't a privilege I have to grant, but a capability that's simply built in?"
