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Knowridge
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This sweat sensor could track hydration and stress in real time
- A new wearable sweat sensor developed by researchers at the University of California, Berkeley, can track hydration levels and stress by analyzing sweat.
- The sensor uses electrodermal activity (EDA) to monitor hydration, a measurement of how easily electricity passes through the skin.
- The device has breathable, water-permeable electrodes that prevent sweat buildup, allowing for accurate readings and real-time updates.
- The goal is to make health monitoring more accessible and personal, empowering people to make better choices about exercise, rest, and mental well-being.
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Pymnts
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Online Sales Muted as Consumers Rush to Buy Cars and TVs Ahead of Tariffs
- Consumers have been front-loading their spending ahead of anticipated price increases from tariffs.
- Retail sales for March showed a surge, with overall spending up 1.4% and the highest month-on-month gain in two years.
- Motor vehicle and parts dealers experienced significant growth of 5.3% in March.
- Electronics and appliances also showed positive growth, with sales increasing by 0.8% in March.
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Eletimes
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Engineering the Future of Compact Audio: A Deep Dive into the NAU82110YG Filter-Free Class-D Amplifier
- The NAU82110YG is a mono, analog-input, high-efficiency Class-D audio amplifier designed for modern consumer and IoT electronics, offering 18W output, filter-free topology, and low-noise performance.
- Class-D amplifiers operate power MOSFETs in saturation or cutoff, resulting in up to a 66% efficiency improvement over Class-AB designs, with typical system efficiencies exceeding 90% under moderate-to-high load conditions.
- The NAU82110YG provides efficient power delivery, up to 18W output into 4 Ω at 12V, up to 10W output into 8 Ω, and low quiescent current, making it suitable for battery-powered applications.
- The amplifier implements a filterless Class-D output using a spread-spectrum oscillator and slew-rate control to achieve compliant EMI performance without external filters.
- Featuring high SNR and PSRR, the NAU82110YG ensures clean audio output in noisy environments and is ideal for wireless audio products and devices powered by noisy supplies.
- With dual-mode input architecture and programmable gain control, the amplifier offers flexibility to support various product configurations and user interface styles.
- The NAU82110YG includes a range of protections such as overcurrent, overvoltage, undervoltage lockout, overtemperature, and anti-clipping protection to ensure system reliability and longevity.
- Key specifications of the NAU82110YG include 18W output power, <6 mA quiescent current, 103 dB SNR, >83 dB PSRR, and flexible gain control options.
- Optimized for applications like Bluetooth speakers, wireless doorbells, outdoor surveillance, and handheld game consoles, the NAU82110YG offers an efficient, reliable, and filter-free audio amplification solution.
- The NAU82110YG is a platform-level audio amplifier that addresses EMI compliance, board space constraints, and dynamic audio control, providing a foundation for designing connected devices of the future.
- For more information, datasheets, and reference designs, visit: https://www.nuvoton.com/products/smart-home-audio/audio-amplifiers/class-d-series/nau82110yg/
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Knowridge
4d
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How VR can trick your brain without making you sick
- A new study from the University of Glasgow reveals that virtual reality (VR) can trick your sense of movement without causing discomfort or motion sickness.
- The researchers found that people wearing VR headsets can experience spinning, speeding up, and turning in the opposite direction from reality, even while remaining comfortable.
- This breakthrough could revolutionize the use of VR in games, simulators, theme parks, and during car rides.
- The study suggests that people's brains can be easily fooled in passive VR situations, leading to more immersive experiences without the risk of motion sickness.
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Knowridge
16h
113
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New crystal tech supercharges light on a chip—No lens needed
- A team of researchers from the Netherlands and the U.S. has developed a new method to concentrate light in a very small space using a photonic crystal.
- This breakthrough could have significant implications for quantum communication, advanced sensors, and tiny lasers used in photonic chips.
- The photonic crystal structure prevents light from spreading through the material, but when two crystals are placed together, a unique boundary is formed where light can move along a narrow edge.
- The light is 'topologically protected,' meaning it can travel without being scattered or reflected by imperfections, and it can be amplified in a concentrated space.
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Livescience
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TSMC's upcoming 2nm microchip is a breakthrough. Here's what it means for the future of tech — from AI to smartphones.
- On April 1, 2025, TSMC introduced the world's most advanced 2nm microchip, set for mass production in the second half of the year.
- Microchips are crucial components in various electronic devices, operating via microscopic circuits with billions of transistors.
- The 2nm chip offers a significant performance boost over the previous 3nm technology, improving computing speed and power efficiency.
- TSMC's microchip advancements have strategic importance for Taiwan's security and economic stability.
- TSMC holds a significant share in the global foundry market and produces advanced chips for tech giants like Apple, NVidia, AMD, and Qualcomm.
- The 2nm chip technology is expected to enhance performance and battery life in smartphones, laptops, and tablets, leading to smaller and more powerful devices.
- Applications like AI, autonomous vehicles, and robotics stand to benefit from the speed and reliability improvements offered by the 2nm chips.
- Challenges associated with manufacturing complexity, heat management, and material limitations need to be addressed due to the advanced technology of 2nm chips.
- Despite challenges, the potential of 2nm chips to revolutionize computing and drive environmental sustainability through enhanced efficiency is promising.
- The advent of smaller, more powerful chips could usher in a new era of innovative consumer and industrial computing solutions.
- TSMC continues to push the boundaries of microchip technology, setting the stage for future advancements in the tech industry.
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Dev
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Announcing Logisim.app: Run the classic logic simulator in your browser
- Logisim.app is a web-based port of Logisim, a popular digital logic simulator, now accessible on any browser without the need for downloads or sign-ups.
- Run by WebAssembly, Logisim.app aims to cater to students, educators, and hobbyists, providing a platform to understand logic gates, CPUs, and computer architecture.
- Logisim.app offers an open-source, free-to-use experience, allowing users to build electronic circuits and simulate computations effortlessly.
- The tool, based on the classic Logisim, enables designing digital logic circuits from fundamental components with a user-friendly drag-and-drop interface.
- Logisim.app functions as a direct port of Logisim via WebAssembly and a JavaScript layer facilitating system functionality for file operations within the browser.
- It targets students, hobbyists, and educators, providing a platform that works on various devices, ideal for remote learning and classroom settings without installation hassles.
- While Logisim.app is based on the original Logisim, efforts are underway to bring Logisim Evolution, a modernized version, to the web in the future.
- The project aims to showcase the capabilities of WebAssembly, providing a practical demonstration of running full applications directly in the browser.
- Future plans involve supporting educators, addressing bugs, and potentially exploring adaptations for Logisim Evolution on the web.
- DRS Software, the team behind Logisim.app, specializes in WebAssembly and advanced web applications, offering solutions to transition desktop apps to the web.
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Knowridge
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This AI drone defeats human champions in world racing first
- An autonomous drone has won an international racing competition, defeating human champions.
- The AI-powered drone was developed by a team from Delft University of Technology.
- The drone won the A2RL Grand Challenge before defeating three former world champions in a head-to-head race.
- The achievement demonstrates the potential for efficient AI in real-world applications such as self-driving cars and emergency services.
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Knowridge
5d
155
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Your skin is talking – and this new device can listen
- Researchers at Northwestern University have created a tiny, wearable device that can listen to the gases released by the skin to provide insights about health.
- The device can measure water vapor, carbon dioxide (CO2), and volatile organic compounds (VOCs), and has various applications such as monitoring wounds, detecting infections, tracking hydration levels, and checking exposure to harmful chemicals.
- Unlike other devices, it hovers just above the skin and collects information using sensors in a small chamber, making it ideal for people with delicate skin.
- The data collected is sent to a smartphone or tablet via Bluetooth, allowing real-time monitoring and providing an opportunity for early intervention in wounds, infections, and other skin conditions.
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Medium
5d
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Image Credit: Medium
AVR Basics: Getting started with I2C
- The I2C protocol enables communication between electronic devices and sensors.
- I2C, also known as Inter-Integrated Circuit, was created by Philips Semiconductor, now NXP.
- I2C operates at a base standard of 100kHz, with faster options available.
- I2C allows for addressable peripheral devices, eliminating the need for separate lines for each device.
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Insider
6d
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Image Credit: Insider
US futures jump after tech tariffs exemptions
- US stock futures are up after the US announced tariff exemptions for many tech products.
- The exemptions relieve the tech sector from 145% tariffs on Chinese imports.
- Trump warned the tariff exemptions are temporary, causing investor confusion.
- Tech stocks in Asia surged following the announcement of the exemptions.
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Knowridge
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How trustworthy is your fitness tracker score
- Composite health scores provided by fitness trackers are increasingly used to offer a simplified measure of how the body is coping with recent demands.
- The science behind these scores may be less solid than it appears due to factors such as sensor accuracy and lack of transparency in how the raw data is converted into a final score.
- Some health scores may penalize users for similar physiological signals twice, exaggerating the impact of a particular stressor.
- While fitness trackers can provide valuable insights, it is important not to treat the daily score as a definitive measure of health and to use them as a guide rather than relying on them completely.
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Pymnts
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Image Credit: Pymnts
Trump’s Tariff Exemption for Tech Products Could Be Short-Lived
- President Donald Trump has exempted electronics from the 'reciprocal' tariffs imposed on China, but they will be included in separate tariffs on semiconductors in the future.
- U.S. Commerce Secretary Howard Lutnick stated that electronics goods like smartphones would eventually fall under the upcoming semiconductor tariffs.
- The exemption of electronics from current tariffs could be short-lived, potentially resulting in the return of tariffs on products like iPhones in a few weeks.
- This decision may generate further business uncertainty, as the government has reversed course on tariffs in the past, leading to market turmoil and sell-offs in the U.S. Treasurys market.
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Knowridge
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327
Image Credit: Knowridge
Scientists create 3D holograms images you can grab
- Scientists have created holograms in mid-air that can be touched and moved with hands.
- The research team developed a true 3D display, called a volumetric display.
- The system uses a fast-moving screen, called a diffuser, made of soft, elastic material.
- This breakthrough allows for natural and interactive user experience, without the need for special glasses.
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Knowridge
7d
236
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New tree gum could make supercapacitors last a lifetime
- Researchers have discovered that a natural tree gum, gum kondagogu, can be used to improve the performance and lifespan of supercapacitors.
- The gum forms a protective layer over the carbon electrodes, preventing damage and allowing the supercapacitors to maintain 93% energy capacity after 30,000 charging and discharging cycles.
- Supercapacitors with the gum layer could potentially last for more than 80 years if charged once a day.
- The gum is biodegradable and recyclable, making it an eco-friendly solution for energy storage.
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