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    OpenAT 3D Printed Toy

    The OpenAT 3D Printed Toy is a Toy which is switch compatible and can be produced by makers without the purchase of a commercial toy. The toy connects to assistive switches by a standard 3.5 mm jack. The Toy is completely open source, fully documented and will incorporate a modular system which will allow for different toy toppers to be made by makers to suit the interests of the child. The toy can be produced using 3D printed components, electronic components, and common hardware.

    Three modes of stimulus, vibratory, light and audio, can be activated upon pressing the assistive switch or the built-in test button. A built-in physical switch can turn off functionality of the different modes of stimulus. Motion of the toy for extra visual stimulus may be added later using a servo motor. Three different versions of the electronics for the toy are currently being tested: A solderless version using Qwiic/Stemma QT/Grove connections, a version which uses solderable components with inline resistors and transistors, and a version which combines the two to make a low-solder version. All three versions use different microcontrollers compatible with the programming environments Arduino IDE, MicroPython and CircuitPython. Volume control, switches for the modes of stimulus, a test button, and the 3.5 mm jack are accessible from the side of the toy on an electronics panel.

    The in-progress design of the first iteration of the OpenAT 3D Printed Toy, with a smiling robot topper is shown below. The ring of lights inside the face of the robot can be used to give the robot different facial expressions, and to make the robot “talk” as the speaker plays a voice recording.


    Figure 1: From Left to Right: Full assembly of toy including topper and base, base with no topper, topper only.


    Figure 2: Breadboard prototype of the “Low-Solder” version of the toy which uses some solderable components and some Qwiic/Stemma QT components. The solderable speaker is also shown in this breadboard photo.


    Any suggestions for toy features or design ideas for “toppers” would be greatly appreciated. Any feedback for the robot design, smiling ring of lights, electronics control panel layout, or other potential improvements for the design would be very helpful as well.



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