From Hack-a-Day: AutoDuct smart motorized air duct shutter

[Vadim Tkachenko]

Hello lurkers,

https://hackaday.io/project/191996-autoduct-smart-motorized-air-duct-shutter

Basically, a hardware solution for what the HCC economizer is doing these days.

Remarkable mechanical, electronics, and software design. And a few interesting links in the article.

Last, but not least, the author's GitHub page: https://github.com/danberwolf/AutoDuct

--vt