The Adapted Limit Switch is a cost effective, open source assistive switch similar to commercially available Wobble Switches. The switch is activated by applying force to and moving a wand in any direction. The switch can be activated by various body parts including the limbs and head. It provides a momentary closed contact that can be used to activate various assistive devices. The Adapted Limit Switch has an interchangeable topper that can be swapped for different shapes and sizes and the base can install with different type of camera mount or clamp . The switch requires approximately 0.55 N (55 gf) and about 24 mm of travel to operate, though this will vary a bit depending on the topper attached.
The current version of the device (v1.0) has been built and user tested.
This is an open-source assistive technology, so anyone is free to build it. All of the files and instructions required to build the device are contained within this repository. Refer to the Maker Guide below.
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Need this device? If you or someone you know could benefit from the Adapted Limit Switch, please send us an email at [email protected]. We also invite you to share your journey with us! Tell us your stories about the device and feedback help us make our assistive tech even better!
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Want to help? We are always looking for volunteers to help build these devices for the community. If you have the skills and want to contribute, please contact us via email at [email protected].
The Maker Guide contains all the necessary information to build this device, including tool lists, assembly instructions, and testing.
The Bill of Materials lists all of the parts and components required to build the Adapted Limit Switch.
Reference the Assembly Guide section of the Maker Guide for the tools and steps required to build each portion.
As open source assistive technology, you are welcomed and encouraged to improve upon the design.
| Document | Version | Link |
|---|---|---|
| Maker Guide | 1.0 | Adapted_Limit_Switch_Maker_Guide |
| Bill of Materials | 1.0 | Adapted_Limit_Switch_Bill_of_Materials |
| User Guide | 1.0 | Adapted_Limit_Switch_User_Guide |
| Changelog | 1.0 | Adapted_Limit_Switch_Change_Log |
The core design for this Adapted Limit Switch is based on the Open Wobble Switch, an open-source assistive technology project.
- Original Designer: Makers Making Change (a program of Neil Squire).
- Original Copyright: Copyright (c) Neil Squire / Makers Making Change.
- Original Source Location: The original project source files are available online at: https://www.makersmakingchange.com/product/open-wobble-switch/01tJR000000698oYAA
Copyright (c) 2024 Engineering Good.
This repository describes Open Hardware:
- Everything needed or used to design, make, test, or prepare the Adapted Limit Switch is licensed under the CERN 2.0 Weakly Reciprocal license (CERN-OHL-W v2) or later.
- All software is under the GNU General Public License v3.0 (GPL-3.0).
- Accompanying material such as instruction manuals, videos, and other copyrightable works that are useful but not necessary to design, make, test, or prepare the Playback Switch are published under a Creative Commons Attribution-ShareAlike 4.0 license (CC BY-SA 4.0).
You may redistribute and modify this documentation and make products using it under the terms of the CERN-OHL-W v2. This documentation is distributed WITHOUT ANY EXPRESS OR IMPLIED WARRANTY, INCLUDING OF MERCHANTABILITY, SATISFACTORY QUALITY AND FITNESS FOR A PARTICULAR PURPOSE. Please see the CERN-OHL-W v2 for applicable conditions.
Source Location: https://github.com/makersmakingchange/Open-Wobble-Switch
- Website: https://www.engineeringgood.org
- GitHub: Engineering Good
- Instagram: @engineeringgood
- Facebook: engineeringgood
- LinkedIn: engineeringgood
- Thingiverse: Not Created
- Printables: Not Created
For technical questions, to get involved, or to share your experience we encourage you to visit our website, contact us or email us at [email protected].