wireless

Disney Research's demo of quasistatic cavity resonance, which uses a purpose-built room or cabinet to generate magnetic fields that deliver kilowatts of power wirelessly to mobile receivers inside.

Dave Jones of EEVblog debunks the uBeam ultrasonic wireless phone charging technology and explains why it is not practical. He covers efficiency, coupling loss and safety, and responds to the founder's remarks about engineers.

Bjorn Nyland compares wireless and wired DC fast charging for an electric car, measuring end-to-end efficiency. The test shows the wireless system holding up well against a plug.

A two-minute 2011 clip of an early uBeam wireless power demo. It shows a short-range ultrasound charging demonstration.

A TEDxNashville talk by uBeam founder Meredith Perry about becoming a technology innovator and her plan for wireless charging of phones.

A short University of Washington demo of ambient backscatter, where battery-free devices communicate by reflecting existing wireless signals. It shows devices powered and linked by ambient RF.

A short project video in which Greg Raiz turns a 32-inch eInk display into a wireless digital newspaper showing daily front pages. It runs for months on battery, and the code is published on GitHub.

A short Conan on TBS segment mocking Apple's new wireless AirPods and the removal of the iPhone 7 headphone jack, in the form of a parody ad.

Technology Connections explains how dishwashers work, why detergent pods underperform powder, and how to use the pre-wash and main-wash compartments. It argues you don't need to pre-rinse dishes.

Apple security head Ivan Krstic gives a Black Hat 2016 talk on iOS security, covering HomeKit, Auto Unlock and iCloud Keychain. He explains key hierarchies and how data can stay safe even in adversarial clouds.

Technology Connections takes apart a 1940s Sunbeam Radiant Control toaster. It senses the toast's own browning and lowers and raises it automatically using purely mechanical parts and no electronics.

Microsoft's Tony Chen explains how the Xbox One was designed to resist physical attacks, including secure boot, encrypted memory, a security processor and a hypervisor. The goal was to make any hardware attack cost more than the price of many games.

AvE tears down the Juicero cold-press juicer, examining its heavily machined parts, electronics and the pricey juice packs. He pokes fun at the product and venture-funded culture along the way.

Technology Connections explains how the simple American drip coffee maker works, including the bimetal valve and bubble-pump heating, and compares the original Mr. Coffee with modern machines.

Techmoan's 45-minute retrospective on Sony's MiniDisc, covering the first and last machines, ATRAC, MD-LP, Net-MD and HiMD. It argues the format deserves more credit than its US failure narrative suggests.

Matt Adereth's Clojure/conj talk covers the history of keyboards and how he used Clojure generating OpenSCAD to design and build his custom Dactyl ergonomic keyboard, including 3D printing and laser-cut parts.

Technology Connections gives first impressions of using an Onyx Boox Max2 e-ink tablet for productivity, including using it as an external display. He shows what the device can and cannot do.

Adam Savage and engineer Zach Radding examine Lumafield CT scans of Apple's $130 Thunderbolt 4 cable alongside cheaper USB-C cables. They explain the internal components that distinguish Thunderbolt from ordinary USB-C.

Techmoan's beginner introduction to the compact cassette, testing metal tapes and Dolby S noise reduction on a Sony TC-S1 deck. He checks whether a cassette can sound close to a CD when good tape and equipment are used.

The full 80-minute Macworld 2007 keynote in which Steve Jobs introduced the original iPhone. It includes the multitouch demos, visual voicemail and scrolling.

Ben Krasnow of Applied Science explains how electrophoretic e-paper displays work and how he modified the driver firmware and waveform lookup tables of a 4.2-inch panel to reach roughly 3Hz partial refresh. It covers the tweakable constants in the refresh process and touches on colored e-ink microcapsules.

Technology Connections explains why single-hose portable air conditioners are inefficient and often a poor choice compared with window units. It details how the single hose pulls in warm outside air and wastes energy.

Techmoan demonstrates the Tefifon, a vintage German audio player that combines elements of record and tape with a grooved elastic loop. He shows how it works and plays it.

A long Gamers Nexus investigation into how volatile US tariffs affect the computer hardware industry. It interviews manufacturers and sellers about costs, margins and why moving production to the US is hard.

Kristy Viers demonstrates the iPhone Magnifier combined with VoiceOver to describe the user's surroundings. She shows how the built-in feature reports scenes, faces and lighting.

A concept video from Nokia Research Center and Cambridge Nanoscience Center showing Morph, a flexible, self-cleaning, shape-changing phone imagined through nanotechnology.

Technology Connections experiments with filtering white and colored LEDs to make holiday lights look less garish. He explains why narrowband LED strings look harsh compared with incandescent bulbs.

Naomi Wu visits the Shenzhen offices of smartphone maker UMIDIGI in person to get them to release source code they owed under the GPLv2, and they comply.

Scott Manley covers how GPS works and how civilian accuracy went from a planned 100 meters to about one meter. He explains the technology and the removal of restrictions that made this possible.

A Technology Connections update video in which Alec Watson tests an Onyx Boox Max e-ink Android tablet used as an external display and shares channel news. It describes his experience with large-format e-ink.

Linus Tech Tips reviews the Looking Glass 8K holographic display, a glasses-free 3D monitor. The video shows the display in action and explains how it works.

DIY Perks builds a webcam mod using a two-way mirror in a box so the camera sits behind the screen image. This allows real eye contact on video calls.

Ben Vallack walks through designing a custom keyboard PCB from scratch using Ergogen and KiCad, ending with a gerber file ready to order from a PCB fabricator. The example is a split keyboard.

Technology Connections examines an old feature-rich microwave and shows how it uses a humidity or steam sensor and lookup data to cook food well, arguing it beats many modern ones.

Technology Connections shows a cheap method for capturing analog video: a composite-to-HDMI upscaler feeding an HDMI capture dongle, aimed at digitizing home movies and VHS tapes.

Tom Scott explains how he built his emoji keyboard, which turned out to be a series of bodged-together tools including AutoHotkey and LuaMacros. He tells stories about the value of quick-and-dirty solutions.

Scotty Allen of Strange Parts travels through Shenzhen's Huaqiangbei markets and learns to upgrade an iPhone 6s from 16GB to 128GB by swapping its flash chip. It is part 3 of his custom iPhone series and shows the difficulty of the hands-on repair work.

Geekerwan reviews smartphone CPUs by power efficiency rather than benchmark scores, with test methodology and chapters on Qualcomm, Apple, Samsung and Google chips. It explains why high benchmark scores can coexist with heat and poor battery life.

A Microsoft Research demo from TechFest 2012 of a lab touch system that lets viewers feel the effect of different input latencies, down to about 1 ms. It shows how much more responsive dragging feels compared with typical 100 ms touch delay.

A ShortCircuit (Linus Tech Tips) review of Nvidia's RTX Voice, which uses GPU-based neural networks to remove background noise from microphone audio. It demonstrates how well the filtering works.