Электровакуумные геттеры. Бариевые газопоглотители

Взглянув чуть более внимательно на изготовление электронных ламп — нехитрых в сущности приборов, с прискорбием выясняется неутешительное — нагрев и пониженное давление превращают привычные, казалось бы, надёжные и незыблемые материалы, натурально, в предателей и прохвостов, так и норовящих подложить свинью и испортить лампу [1]. И только последовательная тщательная и большая подготовительная с ними работа и длительное маринование электровакуумных приборов (ЭВП) на откачном посту заставляет внутренние металлы, стекло, слюду ламп держаться приличий. Если подготовка и очистка, дело неизбежное, то длительную (иногда до суток и более!) откачку ламп на громоздком, сложном, дорогом и энергоёмком оборудовании позволил фантастически сократить некрупный специальный элемент внутри колбы прибора — газопоглотитель, иначе — геттер.

Являясь местным миниатюрным одноразовым высоковакуумным насосом, он поглощает остатки газов, сокращая...

ESP-FLY DIY Kit is a tiny ESP32-S3-based DIY micro drone kit

ESP-FLY DIY kit is a miniature DIY drone kit based on Seeed Studio’s XIAO ESP32-S3 board that was initially introduced as a DIY project on Instructables by Max Imagination, but is now available as a complete kit for $59.99 on Seeed Studio. It’s certainly not the first ESP32 drone, but the ESP-FLY drone must be the smallest, as the miniature (67 x 67 x 31mm) quadcopter design allows users to store into any pocket or small boxes. It’s mainly designed for STEM education,  hobbyist DIY Projects, and indoor flight practice. ESP-FLY drone kit key features and specifications: Main Controller –...

Палиха П-750. Последний телефон с АОН двухтысячных

Приветствую всех!

Когда-то давно, когда стационарный телефон имелся практически в каждой квартире в крупном городе, стали набирать популярность аппараты с определителем номера. Были они очень у многих, с ними связано много воспоминаний, про них спустя годы было написано немало статей, ну а для кого-то бизнес на их сборке вообще стал возможностью пережить тяжёлые девяностые.

В двухтысячные годы такие девайсы начали потихоньку уходить в историю, заменяясь импортными моделями с Caller ID. Один из последних таких аппаратов мы сейчас и рассмотрим.

Сегодня мы посмотрим, что умеет и как устроен самый топовый городской телефон той эпохи. Заодно узнаем, зачем подключать телефонный аппарат к компьютеру и можно...

ESP-FLY micro drone kit offers ESP32-S3-based flight control and ESP-NOW support

The ESP-FLY DIY Kit is a compact micro drone platform built around the Seeed Studio XIAO ESP32-S3, developed as a collaboration between Seeed Studio and Max Imagination. The kit targets educational and hobbyist use, combining a small airframe with wireless control options and a customizable firmware environment. The system is delivered as a DIY kit […]

$4,290+ Unitree R1-A5 and R1-A7 humanoid robots features grippers or dexterous hands, fixed or wheeled base

Unitree has extended its R1 dual‑arm humanoid robot family with new R1-A5 and R1-A7 models, which can be fitted with 2-finger grippers or 3 or 5-finger dexterous hands, and attached to a fixed base or a wheeled base for indoor mobility. The new robots appear based on the low-cost Unitree R1 platform launched last year, which can dance, walk, run, perform kung-fu moves, and chat with users, but is otherwise not overly useful since it lacks dexterous hands. The R1-A5 and R1-A7 won’t be able to dance, since they don’t come with legs, but the upper body comes with a...

NVIDIA phases out several Jetson modules due to high LPDDR4 RAM prices and tight supplies

Following the well-advertised Raspberry Pi 4/5 price hikes, we’ve just written an article about some SBCs quadrupling in price since 2024 due to RAM price increases, and another victim appears to be NVIDIA Jetson modules relying on LPDDR4 memory. That’s according to a lifecycle update by Connect Tech that claims that “due to changes in global DRAM market dynamics, NVIDIA has indicated that supply and pricing for LPDDR4-based modules have become increasingly constrained. As a result, NVIDIA is accelerating End-of-Life (EOL) timelines for” specific modules. Four families are impacted: NVIDIA Jetson TX2 NX (4GB and 8GB) NVIDIA Jetson TX2i (all...

Forlinx UP4 – A 40×40 mm LCC + LGA system-on-module family with Rockchip, NXP, and Allwinner CPU options

Forlinx Embedded UP4 is a new family of pin-to-pin compatible system-on-modules currently offered with Rockchip RK3568J/RK3562J, NXP i.MX 9352, or Allwinner T527N/T536 processors. The UP4 modules measure just 40×40 mm and expose 487 pins through a hybrid LCC (Leadless Chip Carrier) and LGA (Land Grid Array) design with 1.0mm contact pitch and 1.27mm ball pitch, respectively. This should allow companies to design a single carrier board for multiple CPU variants. Forlinx UP4 specifications: SoC FET-MX9352-UP4 – NXP i.MX 9352 with 2x Arm Cortex-A55 cores @ up to 1.7 GHz, Cortex-M33 real-time core @ 250 MHz, 2D GPU only, 0.5 TOPS...

M5Stack Cardputer goes off-grid with new Mesh Kit featuring LoRa, GNSS, and Meshtastic support

M5Stack has just launched the Cardputer Mesh Kit, a portable, card-sized Meshtastic communication terminal built around the ESP32-S3-powered Cardputer-Adv controller and a new LoRa expansion module (CapLoRa-1262). The kit is essentially a modular upgrade to the original Cardputer, where the base unit handles the UI via a 56-key keyboard and a 1.14-inch LCD. The added “Cap” module adds a Semtech SX1262 transceiver and an AT6668 GNSS module, allowing for off-grid text messaging and GPS location tracking without relying on cellular networks. Cardputer Mesh Kit specifications: Core Controller (Cardputer-Adv): Wireless MCU module – M5Stack M5Stamp S3A with SoC – Espressif Systems ESP32-S3FN8 CPU Dual-core...

STMicro VD65G4 and VD55G4 0.56MP global shutter image sensors enable ultra-low-power always-on event-driven vision

STMicroelectronics VD65G4 and VD55G4 are ultra-low-power 0.56-megapixel global shutter CMOS image sensors designed for battery-operated edge AI and always-on vision applications. The main difference between the two sensors is that the VD65G4 features a color RGB Bayer pattern, while the VD55G4 is a monochrome sensor designed to capture visible to near-infrared (NIR) light. Both sensors use a compact 1/9-inch optical format and a 2.16 µm pixel pitch, utilizing Back Side Illuminated (BSI), CDTI, and 3D stacking technologies to achieve a tiny 2.73 x 2.16 mm bare-die footprint. STMicro VD65G4 and VD55G4 specifications: Resolution – 0.56 MP (804 x 704) Chroma...

Raspberry Pi Connect may control Windows soon

Support for remote controlling Windows PCs may be added to Raspberry Pi Connect, Raspberry Pi's free remote access service.

When they announced Pi Connect in 2024, I speculated the service was launched in response to RealVNC's sluggish adoption of Wayland, leading to Pi users lacking a solid remote access solution after Pi OS 12 'Bookworm' was launched.

The service was helpful for those who had one or more Raspberry Pis to access, but the Pi Connect daemon didn't run on Windows or macOS at the time, so a true competitor to RealVNC (at least for basic use cases) it was not.