DietPi September 2025 Update Brings Faster Backups and Roon Server Early Access

The September 20th release of DietPi v9.17 introduces smaller and more efficient system images, faster backups with reduced disk usage, and a new toggle for Roon Server’s early access builds. The update also addresses SPI bootloader flashing issues on Rockchip devices, improves Raspberry Pi sound card handling, and includes multiple bug fixes across tools and […]

LUNYEE 4040 PRO CNC router review with Candle software

LUNYEE has sent us a review sample of the 4040 PRO CNC router, featuring a larger work volume than the LUNYEE 3018 Pro Ultra model we reviewed a few months ago. It is designed for milling and engraving tasks that demand high precision and features a robust structure to support continuous operation. It works with wood, plastic, and acrylic. Its standout feature is the complete set of accessories, such as the Probe system for Z-axis setup and a workpiece clamping kit, allowing users to get started right away. This makes it an ideal CNC Router for beginners in engraving work....

Fing Agent Raspberry Pi Kit – An all-in-one Raspberry Pi 4-based network monitoring solution

Fing has recently introduced the “Fing Agent Raspberry Pi Kit“, also called “Fing Agent plug-and-play Raspberry Pi 4 kit”, for its Fing Agent network monitoring system, which can be considered a follow-up to the earlier Fingbox hardware released in 2017. While Fingbox was a custom appliance based on Ubuntu Core, the new kit uses a Raspberry Pi, making it easier to set up and use in a home or small office network. The kit includes a Raspberry Pi 4 Model B (2GB) in an aluminium case, a 32GB microSD card with Fing Agent preinstalled, a USB-C power supply with adapters, and a Cat...

Nordic nRF54LM20A Cortex-M33 wireless MCU doubles the SRAM to 512 KB, increases flash capacity

Nordic Semi’s nRF54LM20A is a new Cortex-M33-based high-memory wireless MCU part of the nRF54L Series with double the SRAM and higher flash capacity compared ot the nRF54L15. It targets consumer, industrial, healthcare, and smart home applications, and is especially suitable for HID peripherals and gaming devices. The SoC integrates a 128 MHz Arm Cortex-M33 core with a RISC-V coprocessor, 2 MB NVM, and 512 KB RAM, alongside up to 66 GPIOs, high-speed USB, and Nordic’s fourth-generation ultra-low-power 2.4 GHz radio supporting Bluetooth LE, Thread, Zigbee, Channel Sounding, and Matter. It offers twice the processing power, three times the efficiency, and...

Кустарные вакуумные триоды Клода Пайяра. Часть 1. Знакомство, общие положения

Посвятив свой досуг электровакуумным экспериментам, здесь, как и в любом деле, кроме изучения спецлитературы, полезно и оглядываться по сторонам — «изучение аналогов», да. Особенно работ выдающихся коллег-любителей. Примечательных мастерством и любовью к своему делу, или даже использованием минималистического оснащения, как, например, г-н Минье в 1920-х годах [1].

Нынешний наш герой — Клод Пайяр (Claude Paillard). Радиолюбитель (F2FO) с середины прошлого столетия, энтузиаст и реконструктор старого радио, долгое время работавший редактором в радиолюбительском журнале Radio-REF. Вершиной его работ явилось воссоздание кустарного варианта производства раннего французского вакуумного триода ТМ [2], которое он осуществил в 2006 году к столетию начала серийного выпуска этой лампы. Посмотрим же, как в этом смысле вооружён, что делает и каков...

Северный «Визит». Самый красивый домофон советской эпохи

Приветствую всех!

Если вы живёте в Питере или когда-либо бывали там, то вполне могли видеть этот девайс. Появившийся несколько раньше «Сезам» был самым суровым, тогда как этот по праву можно назвать самым красивым домофоном тех лет.

Изначально я думал, что ничего такого про этот экземпляр я рассказать не смогу: за неимением блока управления запустить её не получится. Однако при детальном рассмотрении оказалось, что даже сама панель заслуживает отдельного поста. Что же там такого интересного? Сейчас и узнаем.

Arduino cloud adds Bluetooth based provisioning, starting with UNO R4 WiFi

Arduino has recently introduced a new Bluetooth-based provisioning flow on the Arduino Cloud, starting with the UNO R4 WiFi board. This feature simplifies the initial setup process, making it faster and cable-free, and is aimed at improving ease of use for connected projects. With the Arduino IoT Cloud Remote app, users can power the board, detect it automatically, connect to Wi-Fi, and complete setup with visual feedback in just a few steps. Once provisioned, the board can be managed on Arduino Cloud with features like remote monitoring, OTA updates, real-time dashboards, AI Assistant support, and third-party integrations. The new flow...

A Catalyst for Open Source: NextPCB Launches KiCad Projects Platform to Fuel the Future of KiCad (Sponsored)

NextPCB, a global leader in PCB manufacturing and assembly solutions, proudly announces the launch of kicadprojects.com, a dynamic open-source community dedicated to supporting open-source hardware and enriching KiCad, the renowned open-source EDA tool for schematic capture and PCB layout. This initiative unites engineers, students, and innovators worldwide to share projects, collaborate, and support the KiCad community and core KiCad development. A Hub for Collaboration and Innovation Developed and maintained by NextPCB, a platinum KiCad sponsor, kicadprojects.com is more than a platform—it’s a thriving hub where the global KiCad community can: Share & Showcase Projects – Upload and explore innovative PCB...

Espressif’s EchoEar ESP32-S3 voice-controlled AI chatbot runs esp-brookesia firmware

Espressif Systems’ EchoEar is a compact ESP32-S3 AI chatbot designed for voice interaction and edge AI applications, for smart toys, voice-enabled speakers, and control systems. It features a 1.85-inch circular touch display, a dual microphone array with local wake-word detection, and support for large AI models from OpenAI, Xiaozhi AI, and Gemini. The kit is built around the ESP32-S3-WROOM-1 Wi-Fi 4 and Bluetooth 5 module, and also integrates a 3W speaker for audio interaction, and a microSD card slot for data storage. Other hardware features include a BMI270 IMU, a green LED, a USB-C port, a magnetic connector, and a...

Full eGPU acceleration on the Pi 500+ with a 15-line patch

Full eGPU acceleration on the Pi 500+ with a 15-line patch

Instead of a traditional review of a new Pi product, I thought I'd split things up on my blog, and write two separate posts; this one about hacking in an eGPU on the Pi 500+, for a massive uplift in gaming performance and local LLMs, and a separate post about the Pi 500+'s new mechanical keyboard.

The Raspberry Pi 500+ was announced today, sells for $200, and adds on the following over what was present in the regular Pi...