Introduction: Password locks are common in life, and there are many kinds of them. The most common ones are in digital form. Generally, you need to enter a few digits to complete the password. This project uses colors to complete the password lock. There are many types of colors, which are relatively complex compared to numbers. Using color cards to set and unlock passwords is more difficult to crack, and relatively safer. Author: EEWorld community user wudianjun2001 Original link: https://bbs.eeworld.com.cn/thread-1077500-1-1.html
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