The build log
07 entries · newest firstApr 2026 Latest · Home automation
Home Assistant + NanoClaw
A self-hosted Claude agent on WhatsApp, wired into Home Assistant through ha-mcp — it writes automations, reads CCTV, debugs itself, and runs the house from anywhere. No VPN, no port forwarding.
Aug 2025 · Home automation
Pico Gate Controller
A Raspberry Pi Pico W wired across an old 330 MHz gate remote — a relay, a tiny MicroPython web server, and the front gate becomes one more button in Home Assistant. Written in MicroPython.
Jun 2020 · Raspberry Pi
Raspberry Pi MIDI Footswitch
Four off-the-shelf footswitches on a Pi Zero's GPIO, sending MIDI Control Change messages to an Atomic Amplifire 6 — with short/long-press handling and LED feedback. Written in Python.
Dec 2018 · Python
Telegram Ethereum Price Bot
A Telegram bot that fetches the spot ETH price and the (now-defunct) "Kimchi premium" between Korean and global exchanges. Written in Python.
Aug 2017 · Python
Python RSS Reader
A lightweight always-on-top desktop ticker built with tkinter and feedparser, polling SGX company announcements and the Straits Times every minute and surfacing the latest entries.
Apr 2017 · 3D printing
Plot Clock
A 3D-printed, servo-driven mechanical arm that writes the time on a small board and wipes it clean once a minute. A remix of Joo's Plot Clock, driven by an Arduino. Built with Alex Lim.
Mar 2017 · 3D printing
Assembling a 3D Printer
Eight hours over two evenings turning a US$250 FLSUN Kossel Delta kit into a working printer — and learning how every slicer variable depends on all the others. Built with Alex Lim.
