Archive for the ‘electronics’ category: Page 5

Aug 6, 2022

Semiconductors in the Spotlight

Posted by in categories: electronics, materials

A new model suggests that lattice defects are responsible for the way some semiconductors become harder under illumination.

Understanding how semiconductors respond to illumination has been crucial to the development of photovoltaics and optical sensors. But some light-induced behaviors have been less thoroughly investigated. For example, when some semiconductors are illuminated, their mechanical properties can change drastically, a phenomenon known as photoelasticity. Photoelastic materials could be useful in the development of flexible electronics, but researchers do not understand in detail the mechanism behind the effect. Now, based on experiments and simulations, Rafael Jaramillo of the Massachusetts Institute of Technology and colleagues present a new theoretical framework that explains photoelasticity in terms of lattice defects [1].

The researchers used a diamond-tipped probe to make nanometer-scale indentations in samples of zinc oxide, zinc sulfide, and cadmium sulfide—first in the dark, and then under a range of visible and ultraviolet wavelengths. All three materials hardened to varying degrees when illuminated, with cadmium sulfide showing the largest and most consistent response. For every sample, the effect increased as the photon energy increased toward the material’s band gap.

Aug 4, 2022

Tesla’s 4680 Current Collector Layout

Posted by in category: electronics

More on Tesla’s new battery tech.

Cory and Antonio overview Tesla’s improved cell interconnects, current collector layout, voltage sensor harness (VSH), and battery management system (BMS) of the 4,680 structural pack.

Continue reading “Tesla’s 4680 Current Collector Layout” »

Aug 3, 2022

This tiny camera can show the world from a bug’s point of view

Posted by in categories: electronics, energy

Steerable arm helps save energy while capturing panoramic views.

Jul 30, 2022

Just add water to activate a disposable paper battery

Posted by in categories: biotech/medical, electronics

A water-activated disposable paper battery is presented in a proof-of-principle study in Scientific Reports. The authors suggest that it could be used to power a wide range of low-power, single-use disposable electronics—such as smart labels for tracking objects, environmental sensors and medical diagnostic devices—and minimize their environmental impact.

The , devised by Gustav Nyström and colleagues, is made of at least one cell measuring one centimeter squared and consisting of three inks printed onto a rectangular strip of paper. Sodium chloride salt is dispersed throughout the strip of paper and one of its shorter ends has been dipped in wax. An ink containing graphite flakes, which acts as the positive end of the battery (cathode), is printed onto one of the flat sides of the paper while an ink containing zinc powder, which acts as the negative end of the battery (anode), is printed onto the reverse side of the paper. Additionally, an ink containing graphite flakes and carbon black is printed on both sides of the paper, on top of the other two inks. This ink connects the positive and negative ends of the battery to two wires, which are located at the wax-dipped end of the paper.

When a small amount of water is added, the salts within the paper dissolve and charged ions are released. These ions activate the battery by dispersing through the paper, resulting in zinc in the ink at the negative end of the battery releasing electrons. Attaching the wires to an electrical device closes the circuit so that electrons can be transferred from the negative end—via the graphite and carbon black-containing ink, wires and device—to the positive end (the graphite-containing ink) where they are transferred to oxygen in the surrounding air. These reactions generate an that can be used to power the device.

Jul 30, 2022

Scientists harness chaos to protect devices from hackers

Posted by in category: electronics

Researchers have found a way to use chaos to help develop digital fingerprints for electronic devices that may be unique enough to foil even the most sophisticated hackers.

Just how unique are these fingerprints? The researchers believe it would take longer than the lifetime of the universe to test for every possible combination available.

“In our system, chaos is very, very good,” said Daniel Gauthier, senior author of the study and professor of physics at The Ohio State University.

Jul 29, 2022

Younger Generation is Falling Out from Facebook, Twitter, Instagram and Older Generation Social Media

Posted by in category: electronics

Gen-Z users of social media are flocking to new more visual sites like Twitch. TV, Discord, BeReal, and Poparazzi.

Jul 29, 2022

Technology and Engineering news

Posted by in categories: electronics, engineering

A new division of Science X Network, covers the latest engineering, electronics and technology advances.

Jul 27, 2022

Muon-Based Scanners Will See Through Almost Anything

Posted by in category: electronics

Harnessing muons allows us to see through and inside objects to uncover their secrets.

A muon beam discovered a previously unknown room deep inside the Great Pyramid at Giza. Now DARPA wants to build muon beam imagers.

Jul 27, 2022

50,000-year-old Meteorite Could Revolutionize Electronics And Fast-Charging

Posted by in categories: electronics, futurism

New discoveries from 50,000 year old ‘Diablo Canyon’ meteorite could have interesting potential applications for future electronics.

Jul 26, 2022

Raspberry Pi Zero 2 W Lego-Powered Submarine Makes a Splash

Posted by in categories: drones, electronics

BEC was kind enough to share a parts list of everything used to create this project. It’s operated primarily by a Raspberry Pi Zero 2 W, with most components housed neatly inside an acrylic cylinder. It’s driven by a drone propeller alongside a couple of Pololu 2,130 DRV8833 Dual H-bridge motor drivers. The sensors include both a pressure sensor and a distance sensor, while a Lego Rechargeable 9V Battery Box supplies the power with the assistance of a Pololu 2,123 S7V8F5 5V voltage regulator.

The Raspberry Pi runs Raspberry Pi OS, while the code used to operate the submarine functions is handled using a custom Python script. BEC explains that Thonny was used to run the Python code, which is open-source and available for anyone to explore.

Continue reading “Raspberry Pi Zero 2 W Lego-Powered Submarine Makes a Splash” »

Page 5 of 81First23456789Last