Some image sources and the website to download this model are as follows:

https://grabcad.com/library/arduino-uno-rev-3-ch340-1

Follow the WeChat public account “Mechanical Drawing Dog” to get more related resources.

Notes: This article is only a collection of images and is for appreciation. If you need to share, please follow the “Disclaimer” in the “More Drawings” section on the homepage of this public account.