No more needles! Tracking blood sugar on your wrist

Waterloo researchers design wearable tech that can sense glucose levels for diabetics more accurately than ever before

“We’ve developed radar technology that can now fit inside a smart watch and sense glucose levels more accurately than ever before,” Shaker said. “Just like you use glasses to improve your vision, our technology helps for better sensing of glucose levels.”

To explain how the new system works, Shaker points to weather satellites that use radar to monitor the Earth’s atmosphere and, for example, measure storm movements and other kinds of cloud cover.

“We’ve figured a way to miniaturize these radar systems on satellites and put them in a wearable device and use the same radar technology that looks at changes in the atmosphere to look at changes in the human body,” he said

The system’s key components are a radar chip, which sends and receives signals through the body, an engineered “meta-surface”, which helps focus these signals for better accuracy, and microcontrollers, which process the radar signals using artificial intelligence algorithms. The algorithms improve the accuracy and reliability of the readings by learning from the data over time.

#CGM

Apple's Non-Invasive Blood Glucose Sensor

https://www.patentlyapple.com/2025/02/a-federal-judge-has-invalidated-an-omni-medsci-patent-which-could-open-the-door-for-a-blood-glucose-solution-for-apple-watch.html

#CGM

PiLiDAR - DIY 360° 3D Panorama LiDAR Scanner

https://github.com/PiLiDAR/PiLiDAR

#rPi

Brandon's Semiconductor Simulator

https://brandonli.net/semisim/

Reverse-Engineering Starlink User Terminal

https://www.darknavy.org/blog/a_first_glimpse_of_the_starlink_user_ternimal/

Getting Started with Software-Defined Radio
by David Clark and Paul Clark

March 2025, 336 pp.
ISBN-13:
9781718502543

#SDR

Staying Cool Without Refrigerants:
Next-Generation Nano-engineered Thermoelectrics Peltier Cooling Enable Scalable, Compressor-Free Cooling

A close-up look at the testing and ice buildup on a CHESS-based thermoelectric device. This testing system helps evaluate how efficiently the new materials convert electricity into cooling, paving the way for more effective cooling and energy-harvesting technologies.

https://www.jhuapl.edu/news/news-releases/250521-apl-thermoelectrics-enable-compressor-free-cooling

#Peltier #TEC

In the Samsung Bespoke AI Hybrid Refrigerator, a Peltier device is mounted at the top of the interior, while an AI Inverter Compressor is installed at the bottom.

https://news.samsung.com/global/interview-staying-cool-without-refrigerants-how-samsung-is-pioneering-next-generation-peltier-cooling

#Peltier #TEC

How the Apple Watch measures your blood oxygen saturation

The back of the Apple Watch shines light of a specific wavelength into your skin and measures the reflected light. Heart rate sensing uses green (525 nm) and infrared (850–940 nm) light; blood oxygen sensing added a red light at 660 nm in 2020.

The iPhone will now calculate the ratio of absorbed red to infrared light, then apply calibration constants from experimental data to estimate blood oxygen saturation.

https://www.empirical.health/metrics/oxygen/

Using Wi-Fi Signals to Measure Heart Rate

These results were found using ultra-low-cost ESP32 chips, which retail between $5 and $10 and Raspberry Pi chips, which cost closer to $30. Results from the Raspberry Pi experiments show even better performance. More expensive WiFi devices like those found in commercial routers would likely further improve the accuracy of their system.

https://news.ucsc.edu/2025/09/pulse-fi-wifi-heart-rate/

#rPi #ESP32 #WiFi

60 GHz radar sensors for IoT

Infineon's highly integrated XENSIV™ 60 GHz mmWave radar sensors offer advance sensing capabilities with high precision and low power consumption. Their small form factor enables contactless sensing features for a wide range of applications from simple motion detection and presence sensing to people tracking, gesture control, or vital signs sensing such as heart and respiration rates.

Key Features
Small form factor
Extremely low power consumption
Highly integrated MMICs
Antennas in Package (AIP)
High sensitivity
High accuracy
High resolution
High bandwidth for FMCW operations

Applications
Complete system solutions for smart TVs
Robotics
Heating ventilation and air conditioning (HVAC)
Connected and smart LED lighting for IoT
Security camera and video doorbell
Smart thermostat
Presence sensing

https://www.infineon.com/products/sensor/radar-sensors/radar-sensors-for-iot/60ghz-radar

#IoT

Electron-beam additive manufacturing, or electron-beam melting (EBM) is a type of additive manufacturing, or 3D printing, for metal parts. The raw material (metal powder or wire) is placed under a vacuum and fused together from heating by an electron beam. This technique is distinct from selective laser sintering as the raw material fuses have completely melted. Selective Electron Beam Melting (SEBM) emerged as a powder bed-based additive manufacturing (AM) technology and was brought to market in 1997 by Arcam AB Corporation headquartered in Sweden.

High-Power Microwave Defeats Drone Swarm

https://www.epirusinc.com/press-releases/epirus-leonidas-high-power-microwave-defeats-49-drone-swarm-100-of-drones-flown-at-live-fire-demonstration

Apple iPhone 16e 163-page PDF schematics showing the electrical schematics for the iPhone 16e

Allegro Design Publisher for System Capture

#R2R #RightToRepair

Samsung makes ads on $3,499 smart fridges official with upcoming software update

Update introduces two ways for the fridges to show ads.

So you're going to have to PI-hole your refrigerator!

https://arstechnica.com/gadgets/2025/10/samsung-makes-ads-on-3499-smart-fridges-official-with-upcoming-software-update/

#rPi #piHole

The Connectivity Standards Alliance Announces Zigbee 4.0 and Suzi: Empowering the Next Generation of Secure, Interoperable IoT Devices

Strengthening Security, Range, and Interoperability

Introducing Suzi: Expanding Connectivity Through Long-Range Mesh Networking

Long-range mesh network that gives people the ability to connect more devices and expand the reach of their connected environments.

Suzi unlocks new applications and use cases in the residential, commercial, and industrial space by enabling the first widely adopted standard for Sub-GHz mesh network. Suzi is built on market-proven Zigbee network-layer routing, offers many of the same features, but on a lower frequency.

Source

#IoT #Zigbee #Suzi

Flock Exposed Its AI-Powered Cameras to the Internet.

Flock left at least 60 of its people-tracking Condor PTZ cameras live streaming and exposed to the open internet.

https://www.404media.co/flock-exposed-its-ai-powered-cameras-to-the-internet-we-tracked-ourselves/

Hacking Washing Machines

Description: https://media.ccc.de/v/39c3-hacking-washing-machines

Licensed to the public under http://creativecommons.org/licenses/by/4.0

Electronic Nose for Indoor Mold Detection and Identification

Indoor mold infestations lead to adverse effects on air quality and thus pose significant health risks to humans. Traditional
methods for mold detection and identification are time-consuming and costly. In this study, the application of an electronic
nose as a highly reliable tool for detecting and identifying mold is explored. Two common indoor mold species, Stachybotrys
chartarum and Chaetomium globosum, each separately grown on two different substrates, are investigated. Our e-nose uses vapor-
liquid-solid-grown, UV-activated SnO2 nanowires as the chemiresistive sensing material. Linear discriminant analysis (LDA) is
used for classification. Moreover, novelty detection is enabled by default using decision boundaries. While the conventional LDA
only shows mediocre classification results, improved versions can achieve an average F1-score of 98.37%.

IROH is a modern, open-source networking toolkit written in Rust that establishes direct, peer-to-peer (P2P) connections between devices over the internet. Instead of relying on IP addresses, DNS, or router port-forwarding, Iroh addresses devices using cryptographic keys, effectively treating the entire global internet as a secure local network.
Key features include:

Direct Connections & NAT Traversal: It automatically bypasses firewalls and NATs using hole-punching, falling back to stateless relays only when necessary.

QUIC Transport: Iroh uses the modern QUIC protocol for reliable, fast data streaming and transfer.

Cross-Language Support: It features complete stability across major platforms and languages including Python, Node.js, Swift, and Kotlin.

End-to-End Encryption: Every connection is secured cryptographically, making it ideal for building local-first, decentralized applications.

#IoT #IROH