Wearable monitoring device

A wearable gadget that you attach to your body to figure out how stressed you are. It uses a light sensor to detect changes in your blood flow, which helps it calculate your heart rate. Based on your heart rate, the device then estimates your stress level.

Why it matters: In 2017, the algorithms for reliably determining stress from heart rate were less mature and required more processing power. Today, advances in machine learning and low-power microcontrollers make sophisticated physiological analysis more accessible for wearable devices.

Status: ExpiredProtection ended and was never renewed
How hard to build: SpecializedOptical sensor, processor, physiological algorithm

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