Device Details


The USB Switch Tester is a device used to test the functionality of an assistive switch with a 3.5 mm connection. This device allows the user to determine if their assistive switch is working. This device is not able to be used as a switch interface but rather lights up the red LED light if the switch is pressed and functional. The device is able to be plugged into a powered USB port to be conveniently used without the need for batteries. This is an alternative to the Simple Switch Tester design.

This device is intended to be used by users of assistive switches or disability professionals to confirm whether an assistive switch is functional.


When an assistive switch is pressed and connected to the USB Switch tester, the LED light on the tester will light up if the assistive switch is functional. If the LED does not light up when pressed, the adaptive switch is not functioning properly.

The USB Switch Tester is intended to use the existing USB power sources or USB power adapters which are very common as the power source. USB power adapters are available in most households and can be purchased locally.


~ $30.00 CAD

Build Instructions

The USB Switch Tester requires 3D printing an external shell and soldering of electrical components on a custom PCB. All electrical components are off the shelf, with the exception of the custom PCB board.

Skills Required

  • 3D printing
  • Soldering

Time Required

  • 3D Print Time: 27 min
  • Assembly time: 1 hr


  • 3D printer
  • Soldering Iron/Solder
  • Hobby Knife


3D Printing

All components can be printed with no support at 20% infill with a 0.2mm layer height. All pieces can be printed using PLA filament.

  • 1X USB Switch Tester Bottom Case
  • 1X USB Switch Tester Top Case

Custom PCB

A custom PCB is required for this design. The Gerber files can be found on GitHub for manufacturing.


This is a Makers Making Change original design by Milad Hajihassan and Derrick Andrews.