For our project, we wanted to create a solution to a real-world problem. Many biomedical devices, such as commercially available respiratory monitors, are designed for the developed world and require a stable power-supply to operate. We wanted to implement a solution that is adaptable to different environments.
Our device uses several concepts we learned this semester in College. We use analog-to-digital conversions to sample readings from both the thermistor and the battery, pulse-width modulation to generate a signal for the speaker, and timers to switch between tasks. Our implantation also includes various analog circuitry for voltage regulation and signal amplification. Developing a robust and accurate respiratory monitor served to be a challenging, yet rewarding experience.
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