[i=s]This post was last edited by manhuami2007 on 2022-10-23 10:14[/i]Contactless facial recognition access control system
1. Introduction
In the epidemic environment, people don’t want to touch thing
[color=#252525]In this picture, if you press the right switch, external interrupt 0 will respond, and if you release the switch, external interrupt 1 will respond. If you don't press it, there will be
[img]javascript:;[/img] Sometimes it can start normally. Sometimes it starts without any output and it seems to be locked and there is no output. Under normal circumstances, the load is about 300mA.
Written in front:
If the forum is like a school, then the moderators are like the teachers of various subjects in this school, spending their personal time and energy to share what they see and know i
NFC technology evolved from contactless radio frequency identification (RFID). The transmission range of RFID can reach several meters or even tens of meters, and it can only read and judge informatio