ESP32 DIY Smartwatch with 192 LEDs

Hackaday ESP32 PICO smartwatch project summary: ESP32 PICO D4 design with IS31FL3733-driven 192 LEDs (four concentric rings), I2C control, WiFi/Bluetooth/ESPNOW mesh.

Smartwatch Blood Pressure Accuracy and Key Features

Overview of smartwatch features and uses, including health monitoring, activity tracking, notifications, and limitations of wrist-based blood pressure estimates.

Skin-Integrated PPG-ECG Multimodal Sensing Patch Design

Skin-integrated PPG-ECG patch using ultraflexible organic photodetectors and hydrogel electrodes to monitor HR, RR, cuffless BP and SpO2 with high NIR responsivity.

Wireless Charging for Wearables with STWLC38

Technical overview of STWLC38 wireless power receiver for wearables, covering Qi certification, FOD and ARC features, reference designs and development resources.

Smart Helmet Features and Applications

Technical overview of smart helmet technologies, covering augmented reality, head tracking, VR displays, wireless communication, HCI, and safety monitoring for engineering use.

Basic Structure of VR Headsets

Technical overview of VR headset components: processor, display, convex lenses and gyroscope for orientation tracking and high-refresh rendering to reduce motion sickness.

Smartwatch and Patch Using a Piezoelectric Blood Pressure Sensor

KAIST-developed wearable piezoelectric blood pressure sensor validated in clinical trials, meeting accuracy standards and integrated into smartwatch and patch prototypes.

Flexible Electronic Skin: Applications and Pros/Cons

Overview of flexible electronic skin: bendable, stretchable sensors for biomedical monitoring, wearables, robotics, VR; advantages, limitations and integration challenges.

YOBYBO Card20 Pro True Wireless Earbuds Teardown

YOBYBO Card20 Pro teardown and overview of the slim aluminum TWS earbuds, internal components, battery and connectivity.

Wearable Sweat Sensors: Benefits and Applications

Review of wearable electrochemical sweat sensors summarizing analytes, sampling and collection methods, sensor and power system design, integration, and challenges for clinical use.