DIYAT Switch V4 (threaded latch, radial flexures)

thingiverse

This is a straightforward **Do It Yourself Assistive Technology** switch enclosure similar to the popular **DIYAT V5** on Thingiverse (https://www.thingiverse.com/thing:3146646). The main difference lies in the switch used for this enclosure, which is a compact **"Lilypad Button Board"** requiring minimal activation force and capable of signal level switching. This three-part enclosure (no screws required) makes a small momentary tactile button switch more durable and accessible by providing protection and a larger activation surface. Designed with OpenSCAD, this parametric design allows users to select the build diameter, base style (plain or strap mounting), and button style (recessed or protruding). STL files for the smallest size with a protruding button are provided for convenience. For larger sizes or other options, use the Customizer. Ensure that the custom diameter setting matches each of the three parts to guarantee a proper fit. This version features a threaded latch and uses radial flexures for frictionless activation. Although it is frictionless, there is resistance from the flexures that slightly increases the activation force. To understand how the flexure works, watch this video: https://youtu.be/2EqkSfG4u5U. **Note:** The switch used in this design is suitable for signal level switching (loads under 50mA), as with any AT switch based on a PCB-style tactile switch. For inductive loads, such as motorized toys that have been switch-adapted, be aware of the load current, which can easily exceed 50mA. For loads up to 5 amps, consider my **DIYAT Switch V5**, although it is larger, the microswitch used still has low activation force. The DIYAT Switch is designed to be simple to build, durable, inexpensive (with minimal parts), and customizable in size and style. This design consists of three parts that fit together and must be printed with sufficient precision for proper operation.