This is a simple DIY assistive switch with a low activation force of about 0.3 – 0.4 N (30-40 gf). It is well suited for use with a finger, and can be used with standard AT equipment as well as the Xbox Adaptive Controller.

The design is based primarily on the XBox adaptive controller low cost/force buttons design by davross and also incorporates changes made in the remix by scruss. It includes several other changes to improve printability and function.

More details can be found at the MMC Open-Source Assistive Technology Library project page: https://www.makersmakingchange.com/project/light-touch-switch/