PRJ-002 · LOG-01 · 2026-06-12 · electronics

Motorizing the summer-house valve with four transistors

My family's summer-house garden tap hides behind a manual valve in an awkward crawl space. Step one of replacing it: I drive a CR05 motorised ball valve from a single switch using four discrete transistors instead of a microcontroller — for fun, and tested on a breadboard.

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PRJ-001 · LOG-01 · 2026-06-12 · meta

Hello, world — setting up this log

Why this site exists, how it works, and what it's built with: plain HTML committed to git, graph paper drawn in CSS, and a deploy pipeline that is just git push.

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