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AT 3.5mm Button

3.5mm button for interacting with adapted toys and tools.

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This is a low cost, printable AT button. It interfaces with any standard 3.5mm mono jack system, commonly found in support situations for people living with physical disabilities.

AT buttons are a way for someone with a limited range of motion to control his or her environment at the same level as anyone else. These buttons can be used to adapt toys and home appliances such that they can be actuated with ease. Most AT buttons available are quite expensive, and are engineered to be used in serious -- 100% reliability -- situations. As a result there are a lot of DIY projects to make buttons meant for more relaxed use cases. We wanted to make a button that can be used for toy adapting and similar functions, while also providing a clean and durable design.

Why

This button was created as part of a team-based senior design course. We worked with a local organization, UCP and TASC of Huntsville, to design and construct an AT keyboard and AT button.

How

Making one button takes me about 8 hours of printing and 1 hour of assembly.

MaterialsAssembly
  • Print the button base, button hatch, and and key cap.
  • Solder the MX switch to the mono port with two pieces of wire, about 3 inches each.
  • Install the MX switch in the middle of the button base, and then run the mono jack to the port on the flat side. Screw the mono port's threads into the hole in the side of the button.
  • Jam the key cap onto the cherry MX switch. This can optionally be done with a light spring over the switch stem to adjust the force of the button.
  • Optionally glue or bolt (M3 bolts) the shelf liner to the bottom of the button to make a no-slip base!

Can also optionally have superglue to hold things together.

Standard Tesselated Geometry - 689.37 kB - 08/23/2016 at 19:47

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Standard Tesselated Geometry - 863.46 kB - 08/23/2016 at 19:47

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button_base.fcstd

Design file.

x-extension-fcstd - 349.61 kB - 08/23/2016 at 19:47

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button_hatch.fcstd

Design file.

x-extension-fcstd - 16.47 kB - 08/23/2016 at 19:47

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Standard Tesselated Geometry - 3.40 kB - 08/23/2016 at 19:47

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  • 1

    Making one button takes me about 8 hours of printing and 1 hour of assembly.

    MaterialsAssembly
    • Print the button base, button hatch, and and key cap.
    • Solder the MX switch to the mono port with two pieces of wire, about 3 inches each.
    • Install the MX switch in the middle of the button base, and then run the mono jack to the port on the flat side. Screw the mono port's threads into the hole in the side of the button.
    • Jam the key cap onto the cherry MX switch. This can optionally be done with a light spring over the switch stem to adjust the force of the button.
    • Optionally glue or bolt (M3 bolts) the shelf liner to the bottom of the button to make a no-slip base!

    Can also optionally have superglue to hold things together.

View all instructions

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