This speed sensor or module is intended to be used in portable devices.When the device moves too fast, such as more than 20cm/s, it will output a voltage signal or other signals that can be recognized
See Figure 1, Foxit Reader. Click the Add Bookmark button on the upper left to add a bookmark. This shows that this Foxit Reader can add bookmarks.See Figure 2, another PDF file, the same Foxit Reader
[i=s]This post was last edited by UUC on 2020-5-23 17:09[/i]Help: Electronic version of Tongji University's Advanced Mathematics, Volumes 1 and 2, no limit on editions. If anyone has the resources, co