Problem
Biosignals are often explored with separate devices, displays, and code.
Engineering Projects
Ideas tested in the real world.
Every project is documented as a process: Problem → Research → Design → Prototype → Testing → Reflection.
02 / TEIFeatured case study · 2025
Portable 3-in-1 Biosignal Monitor
- Purpose
- Bring three biosignal experiments into one portable interface
- Modes
- ECG / heart rate, EMG, and pulse oximetry
- Platform
- STEPico / RP2040 with a 1.54-inch TFT
- Tools
- MicroPython, electronics prototyping, Fusion 360
- Development
- Approximately 150 total hours
Case-study process
One device, six engineering stages.
Research
Compared sensor requirements, signal types, interfaces, and power constraints.
Design
Planned one interaction model around a shared controller and display.
Prototype
Integrated ECG, EMG, and pulse-oximetry modes into one physical system.
Testing
Checked each mode separately, then resolved conflicts during system integration.
Reflection
A modular architecture made debugging clearer and future changes more practical.
Design decision
Hardware and enclosure developed together.
The enclosure was organized around the real controller, display, sensors, controls, connectors, and cable paths. Component clearances and mounting points were treated as engineering constraints rather than decoration added after the electronics worked.
Each biosignal mode was first developed independently. Integration then required shared display logic, mode switching, input mapping, and a physical arrangement that remained understandable during testing.
Educational engineering prototype. It is not intended for diagnosis, treatment, or medical decision-making. Body-connected testing should be supervised by a teacher or experienced adult.
What comes next
Future projects will be added when there is a real problem, a documented process, and evidence worth sharing.
The goal is not to fill a gallery quickly. It is to build a growing record of thoughtful student engineering across health, education, accessibility, transportation, sports, and the environment.
Have a problem worth exploring?
The next project can begin with your observation.
Submit an idea from your school, home, neighbourhood, sport, or daily routine.
Explore community ideas ↗