Install LibreEcho on an Amazon Echo 2nd Gen

Someone Turned a Raspberry Pi Game Boy Into a DIY Cyberdeck

A maker transforms a Raspberry Pi gaming handheld into a DIY cyberdeck with GPS, Wi-Fi, a camera, and an ESP32. See the community build.

The $8 Linux Computer (2022)

An $8 Ox64 RISC-V single-board computer can run full Linux, not a stripped-down MMU-less kernel. It has three different RISC-V cores, but ethernet, wifi and SD card don't work yet. Flashing it is painful: it must be programmed over UART, not USB, and DevCube crashes on Wayland so you need Xorg. A CH340G USB-UART dongle failed the handshake, so the author used an RP2040 (Adafruit KB2040) running picoprobe as a serial bridge, then had to modify bflb-mcu-tool's uart interface file to strip DTR/RTS handling before it would flash the M0 core.

Nibnib: Image compression with extreme decompression speed

Image compression at 4bpp with extreme decompression speed - raphlinus/nibnib

I put a temperature sensor in every room, and my thermostat had been lying about my house for years

My Nest only knew the hallway, and a $40 sensor proved the hallway was the wrong room

How Noise-Cancelling Headphones Actually Remove Sound in Real Time

Trên các chuyến bay ồn ào, tiếng động cơ liên tục gây khó khăn trong việc nghe nhạc hay podcast. Các tai nghe chống ồn hoạt động bằng cách thu âm thanh môi trường và tạo ra tín hiệu âm ngược pha với tần số 35Hz đến 2000Hz, phù hợp với dải tần tiếng ồn phổ biến. Công nghệ ANC (Active Noise Cancellation) sử dụng microphone exterior để phân tích âm thanh vàDSP (Digital Signal Processor) để tạo ra âm thanh đối nghịch. Kết quả là hệ thống có thể giảm tới 20dB tiếng ồn tại dải tần thấp, giúp người nghe có trải nghiệm tốt hơn mà không cần tăng âm lượng lên mức có hại.

Bài giải thích cách tai nghe chống ồn hoạt động sẽ giúp lập trình viên hiểu được các thuật toán xử lý tín hiệu thời gian thực được áp dụng trong thực tế.

5 ESP32 projects that can run on batteries for a whole year

Making your ESP32 projects last a year just requires simple tweaks

Toddler Phone Calls Family And No One Else

A hobbyist built a toddler-safe telephone that can only call pre-set family contacts. An ESP32-S3 acts as a USB host for a commercial retro-style handset and runs a minimal SIP client connecting over WiFi to a VoIP account, in this case Twilio. There are no inbound calls, so there's no risk of scam calls. Each contact gets an arcade button that lights up based on that contact's time zone, and a text-to-speech voice announces network errors or when it isn't call time.

Bootlin at Capitole du Libre in Toulouse, November 14-15

Bootlin will attend Capitole du Libre in Toulouse on November 14th and 15th as a Platinum sponsor. The company will run a booth in the main hall for discussing activities, career and internships. Thomas Petazzoni presents a sequel talk, 'What's new in the Linux kernel? A year of changes, 2026 edition'. Thomas Bonnefille covers secure over-the-air updates for embedded systems with RAUC. Maxime Chevallier and Alexis Lothoré run a 'Linux Tracing Escape Game' workshop on system diagnostics and tracing.