Description

Bela I/O shield

The Bela I/O shield is design for the Beaglebone Black based Bela platform (bela.io), with the following features:

12 schmitt trigger inputs with adjustable threshold and hysteresis.
4 digital outputs, with high current push-pull output stage.
Isolated UART to USB converter, for galvanically isolated data communication with a laptop.'

The shield is designed with real-time audio processing for hyperscanning experiments in mind.

Please refer the following paper if you use our design, additional information on usage of the platform is available in the paper as well.

Zamm and Kappel et al., "The Tapping Orchestra: A 10-Person Platform for Measuring Behavioral & Neural Synchrony During Group Interaction"

Code

Example Bela code

https://ece.au.dk/tapping-orchestra

Schematic and Layout

PCB and schematic files

https://ece.au.dk/belashield

Download BOM(Bill of materials)

Aug 27,2026

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Bela I/O shield

Shield for the Beaglebone black based Bela platform, providing 12 schmitt trigger inputs, 4 outputs and isolated USB (CDC) interface.

Published: Aug 27,2026

Standard PCB

BOM(Bill of materials)

Centroid file

Other files for Assembly

PCBWay Donate 10% cost To Author

File Last Updated: 2026/08/27 (GMT+8)

File update record

2026-08-2720:46:41

Other files for Assembly are updated.

2026-08-2720:46:41

Centroid file is updated.

2026-08-2720:46:41

Parts List (BOM) is updated.

2026-08-2720:46:41

Gerber file is updated.

Only PCB

PCB+Assembly

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Project images are for reference only. Actual production is based on the manufacturing files on the project page. Please review the designer's notes (e.g., PCB thickness) and select the appropriate options. PCBWay is not responsible for issues caused by unsuitable parameter selections.
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