Ergonomic Triple Input Switch

This triple-input switch is a custom-designed assistive technology device created for individuals with limited fine motor control or unique grip requirements. Standard assistive switches are often flat and require a specific "hitting" motion; this device solves that by providing an ergonomic, hand-held form factor that integrates three distinct inputs: a high-contrast yellow button, a red button, and a sensitive lever microswitch.

This multi-switch setup allows a user to control complex gaming interfaces or software navigation with a single hand, bridging the gap between standard controllers and accessible switch-adapted technology.

The biggest challenge was managing the wire density inside the small ergonomic grip. I adjusted the design by adding heat-shrink tubing to minimize clutter. This design supports accessibility by offering a "grip-style" interface rather than a "slap-style" interface, which is better for users with high muscle tone who need to hold onto their controller for stability.

3D Files:

1. Main Housing STL: https://www.tinkercad.com/things/6aWYuzu1kZO-super-waasa-habbi

Electronic Components:

1. 2x Tactile Push Buttons (Yellow and Red)
2. 1x Long-lever Microswitch
3. 3x 3.5mm Mono (or Stereo) Audio Jacks
4. Hook-up Wire: (Red, White, and Orange for color-coding circuits)
5. Heat Shrink Tubing: For securing soldered joints.

Tools:

1. 3D Printer (or molding material for the grip)
2. Soldering Iron and Solder
3. Wire Strippers
4. Hot Glue Gun (for internal component securing)

What to do: Download the STL files from the provided Tinkercad link. Print the "Super Waasa Habbi" body using a high-density infill (at least 20%) to ensure it can withstand the pressure of repeated clicking. Why: A sturdy housing is essential for accessibility devices to ensure they don't shift or crack during intense gameplay.

What to do: Cut six lengths of wire (approx. 6 inches each). Solder two wires to each of the three switches (Yellow button, Red button, and Microswitch). Why: Color-coding your wires (using the red, white, and orange shown in the diagrams) helps keep track of which switch corresponds to which 3.5mm output jack during the final assembly.

What to do: Press-fit the yellow and red buttons into the top face of the housing. Mount the microswitch at the front edge so the lever is easily reachable by the index finger. Why: This specific layout allows for "multi-modal" input, giving the user different tactile options depending on their hand strength.

What to do: Solder the wire pairs to the terminals of the three 3.5mm jacks. Use heat shrink tubing to cover the exposed solder points. Why: The 3.5mm jack is the industry standard for assistive technology, allowing this device to plug into an Xbox Adaptive Controller or similar interface.

What to do: Carefully tuck the excess wiring into the hollow center of the housing. Use a small amount of adhesive to secure the housing if it is a two-part print. Why: Ensuring no wires are pinched prevents short circuits and ensures the longevity of the device.