Sign up for
Participate with your entry in one of our professional or student awards.Sign up for an award
You are using an outdated browser. Please upgrade your browser to improve your experience.
Every time I see the school's administrators are open to open the classroom door, I found two problems: First, they can not identify the keys once. This is a waste of time. Second, in the evening when they open the door, they all need lighting tools. So inconvenient. So I did a design to solve this problem. Different color fluorescent stickers key, whether it is night or day can quickly open the door.
Xiemin Chen Chiqiang Wang Yanlong Ma Junjie He