AC Unit Hardware Revision Archive外机板早期硬件版本归档

Starting Point起点

When I was organizing V2.1, I almost left only the final version. Later I realized that would be misleading: if people only see the final screenshots, they cannot tell how the board shape, interfaces, and board split evolved. V1.0 and V2.0 are not necessarily polished, but they preserve the early traces of the external unit board.

整理 V2.1 的时候，差点只留下最终版本。后来发现这样很别扭：只看最终截图，会完全看不出板形、接口和拆板方式是怎么变出来的。V1.0 和 V2.0 不一定漂亮，但它们能把外机板的早期痕迹留下来。

V1.0 更像早期机械和制造记录，V2.0 已经能看到三板拆分的雏形。把这些东西留下来，后面写版本对比的时候才有东西可讲。不然全靠回忆，回忆这种东西最不靠谱。

Is It Worth Keeping Old Versions?旧版本有必要放吗？

有必要，但不能乱放。旧版本的意义不是把早期工作夸得很完整，而是能看出设计怎么一步步变清楚：一开始关注板形和接口，后面才慢慢拆出主控板、分电板、交互板。

Revision Files版本文件

V1.0 先保留为早期版本线索。

V2.0 已经按主控、分电、交互三块板整理。

Notes To Add Later后面要补

The missing piece is a revision comparison table: what changed from V1.0 to V2.0 to V2.1, why each change happened, which changes came from power issues, which came from interface issues, and which were made for later firmware integration. Once that table exists, this hardware line will be much clearer than a page of renders alone.

后面最该补的是版本对比表：V1.0 到 V2.0 到 V2.1 到底改了什么，为什么改，哪些是电源问题，哪些是接口问题，哪些是为了后续固件联调。表格补上以后，这条硬件线会比单纯放渲染图清楚很多。