技術筆記 Field Notes
做過的事、踩過的坑、想清楚的事。 Things I've built, broken, and figured out.
RS485 通訊為什麼一直出問題 Why RS485 Keeps Failing You
終端電阻、接地、匹配阻抗——三個最常被忽略的原因。 Termination, grounding, impedance matching — the three things everyone skips.
CFD 模擬前你應該先問的五個問題 5 Questions Before You Run Any CFD Simulation
模擬結果跟現實差很多？通常是邊界條件設錯了。 Results don't match reality? It's probably your boundary conditions.
從草圖到可以量產：DFM 到底在看什麼 From Sketch to Production: What DFM Actually Means
設計師最常踩的坑，是在打樣通過之後才發現量產做不了。 The most common trap: a prototype that passes, but can't be manufactured at scale.