Article list

I wanted to look up songs played on J-WAVE’s TOKIO HOT 100, so I built Sunday Music with help from AI.

I used ChatGPT to help build a podcast delivery system with Lambda, S3, and CloudFront, including RSS feed generation.

Step-by-step guide to connecting a CUSTOM CO2-mini USB sensor to a Raspberry Pi, reading CO2 and temperature data with Python (CO2Meter library), writing values to shared memory, and graphing them with Zabbix via UserParameter. All scripts and config files included.

How to build a photo frame with a Raspberry Pi 3 and the official 7-inch touchscreen, then add automatic display brightness control using a GY-30 BH1750FVI ambient light sensor connected via I2C. The brightness control program is written in Python and published on GitHub.

I built a Raspberry Pi 4 photo frame that downloads images from Google Drive using rclone and displays them with fbi and Python. Setup notes and source code included.

Hands-on review of the Anker Soundcore Mini compact Bluetooth speaker. Covers the 15-hour battery, FM radio, microSD playback, steel build quality, and one notable drawback — a volume reset issue when used with Apple devices.

Hands-on review of the EPSON GT-X830 flatbed scanner for digitizing old film negatives. Includes scanning speed comparison at 1200–4800 dpi, Digital ICE Technology before/after results, and real scans from deteriorated 1970s–1980s negatives.

An unfamiliar Mac appeared in Hanoi and returned after deletion. My Apple support experience, plus current removal conditions and precautions for devices you no longer own.

Benchmark comparing H.265 hardware encoding (hevc_videotoolbox) versus software encoding (libx265) on an M1 Pro MacBook Pro using ffmpeg. Hardware encoding is approximately 15x faster and handles 4K video in real time. Includes commands, speed results, file sizes, and image quality comparison.

How to install ffmpeg on macOS using Homebrew in a single command. The Homebrew formula includes support for many codecs (check with ffmpeg -codecs). On Apple Silicon (M1/M2), hardware encoding via videotoolbox is also available for fast H.264 and H.265 encoding.