Classroom Voting Device

Students in our micro:bit programme looked for a way to end the arguments over which game to play in class. Each student’s board sends a vote with button A or B; the teacher’s board collects the votes over radio and shows the result as a bar chart on its LED matrix.

The process

To stop anyone voting twice, the team gave each board an ID number. In the first test some votes were lost; adjusting the radio group and the sending interval fixed the problem. A case with a battery holder was designed for the boards on the 3D printer.

The system is now used at the academy as a polling tool at parent seminars. During the project students also discussed why anonymous voting matters and how showing results to everyone at once supports a fair decision-making process. They also wrote a short user guide for the system.