Multimodal Wearable Sensor Patch for Continuous Plant Monitoring

Multimodal wearable sensor patch for continuous plant physiology monitoring detects leaf VOCs, temperature and humidity; PCA-based ML enables earlier disease and stress detection.

Pulse Oximetry Principles for Wearable Vital Signs

Technical overview of vital signs monitoring and pulse oximetry principles, plus the AS705X AFE series for ECG/PPG acquisition in compact devices.

Flexible Wearable Optical Wireless Sensor for Fruit Quality

Flexible wearable optical wireless sensing (FWOS) system using laser-patterned PET/PI/Cu circuits and AS7263 NIR sensors for real-time fruit quality monitoring via Bluetooth.

YOBYBO Card20 Pro True Wireless Earbuds Teardown

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

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.

Quartz Crystal Oscillators for Wearable Devices

Technical overview of crystal oscillators for wearables, covering frequency, package, low-power and vibration requirements, plus a smartwatch nRF52840 reference design.

Open-Source Bone Conduction Hearing Aid Research

Technical overview of bone conduction headsets, openMHA-based hearing-aid research hardware, audio codecs, ASIC/ML integration, and key limitations.

Skin-like Conductive Fibers for Multifunctional Sensing

Silk fibroin–MXene conductive fibers (Ca@MSNFs) enabling stretchable, repairable, antifreeze and degradable wearable humidity and strain sensors for health monitoring.

How HUD Head-Up Displays Work and Their Advantages

Technical overview of automotive HUD (head-up display) technology: optical projection, components, displayed data, implementation approaches, constraints and future trends.

MR Headset Features and MRI Imaging Principles

Overview of mixed reality (MR) headsets — origins, tracking and interaction capabilities — plus fundamentals of magnetic resonance imaging (MRI) signal processing, reconstruction.

Embedded STM32 Smartwatch Implementation

Compact STM32 bare-metal project implementing a multi-level menu UI on a 0.96-inch OLED integrating DHT11, RTC, keys and LED with GPIO I2C emulation.

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.

What Smartwatches Do and Typical Battery Life

Overview of smartwatch functions and battery life: features (health tracking, notifications, GPS, apps) and factors affecting real-world battery performance.

Electronic Skin: Overview and Wearable E-Skin Operation

Overview of electronic skin (e-skin) architecture and operation: flexible substrates, integrated sensors, power, data processing and communication for wearable applications.

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.

Wearable Ultrasound Patch for Transdermal Delivery

MIT-developed wearable ultrasound patch uses piezoelectric discs in PDMS to create microjets and transient microchannels, enhancing transdermal drug delivery and penetration depth.

Four Types of Wearable Noninvasive Glucose Sensors

Review of wearable noninvasive glucose sensors for diabetes management, covering ISF, sweat, tear and saliva sensing, device challenges in safety, power, and data reliability.

Dyson Air-Purifying Headphones: Motor Control Analysis

Teardown of Dyson Zone air-purifying headphones detailing ANC integration, motor and filtration design, key ICs (BES2300, LPC5528) and the DRV10975 motor driver.

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.

Do head-mounted displays harm your eyes? Pros and cons

Overview of head-mounted displays (HMDs): design, display and tracking technologies, interaction and audio, use cases, eye-health risks, pros and cons for VR/AR applications.