Braille Calculator

Designed by Makers Making Change in partnership with Makey Makey and Tracy Zhang: Link

Project Need: Blindness and Visual Impairment
Capabilities Needed: 3D Printing, Assembly
Project Link:
License: Attribution 4.0 International
Attribution: @zhangcu2 , @Butzuk, @lyonsm

This device uses a Makey Makey Classic, 3D printed Braille, and a scratch project to create a calculator that allows users to do simple addition, subtraction, multiplication, or division with audio feedback. The calculator will allow the user to input a mathematical expression, guess the answer, and finally give the correct answer to compare with the user inputted answer and verify audibly if it was correct or incorrect. This device can be used with any PC, tablet, phone, or device with a USB (type-A) port and internet connection.

This device is intended for individuals that are visually impaired in an educational setting to practice math. The user is able to interact with an online calculator project created in Scratch that audibly interacts with their inputs using the brass contact points. The calculator includes 3D printed Braille labels of what each contact point represents. The calculator is capable of performing one multiplication, division, addition, or subtraction action at a time. This calculator is compatible with any device that has a USB (type-A) port and an internet connection.