With a “drop--”, the walk-in machine began to turn, and as a result of the connection of a line attached to the axle to the hand behind the lock of the door, the line gradually became shorter, while the hand was pulled left, the door opened。
In recent days, zhong won-shin of the university of electronic science and technology in the second year of college has been busy. The fingerprint lock of the dormitory, made by his “certificate”, has attracted the attention of a number of schoolteachers and has become a “net-red” in the circle of friends, even those in other bedrooms。
It's interesting. Smart fingerprint locks are based on lazyness
According to students, the fingerprint lock was developed by stm32 circuit boards and consisted of four parts of stm32 master board, fingerprint identification module, step-by-step machine and oled screen. Fingerprint recognition module, step-by-step machine, oled screens, respectively, were inserted at the appropriate position on the circuit board and powered with a chargeable 5v voltage, and the fingerprint lock began work。
Zhong won-shin demonstrated the operation of the fingerprint lock - first press the power button of the circuit board, and then the system begins to start. The k5 key on the board then entered the fingerprint identification module and the oled screen was followed by the put your finger command, at which point fingerprint information could be verified on the fingerprint identifier。
Zhong yuanjin has previously taken fingerprints of roommates and numbered them, with different numbers corresponding to different names. If it is recorded in the fingerprint library and successfully identified, the fingerprint identifier returns a real value to the circuit board chip, which then directs the oled display screen to "search securityful". Depending on the number of the returned value, the old screen displays the "welcome back + roommate name". If fingerprint recognition is unsuccessful or the fingerprints were not previously recorded in the fingerprint library, the old screen displays “failed, try again”。
Turning to the birth of the fingerprint locks, zhong yuan believed that the original idea was simply one of his own “sluggering”. “my roommate is very concerned about raising a child and has bought an electronic name in the dormitory to `monitor' his weight at all times. Just a few of our classmates in the small room, and the other roommates in the back room know about it and often come to our dorm and call it weight. My position is by the door, and every time i close the door, i write the program in half, and i interrupt because i open the door. I was wondering if i could make a fingerprint lock that would allow other small roommates to talk to us in our bedroom, while at the same time allowing us not to bother by opening doors frequently.”
The fingerprint lock became a contestant
With this idea, zhong won-shin began to conceptualize the design of the fingerprint lock and purchased relevant materials online. He used the extra-curricular hours to write the fingerprint locks and to assemble them with his roommates. In the process, zhong won-shin and his roommates also encountered a number of problems, and they defused them. At the beginning, they passed the electrical route directly through the door, but because of pressure, which often resulted in short-wire circuits, they had to drill a small hole in the door with specialized equipment from the masters in charge of the maintenance of the dormitories. In order to solve the problem of the overstretching of the du pont line, they were able to find suitable outsourced material to extend and seal the du pont line. After the first edition had been completed, they encountered problems with procedures that could not be burned, and zhong won-shin students had been subjected to continuous calibrations, which eventually had a better effect. When the fingerprint lock was first in use, it was slow because of limited voltage, and in order to reduce resistance, zhong won-shin students put rubber bands behind the lock, making it easier to pull hands back and away. Throughout the process, zhong yuanjin students and roommates have been searching and improving, and this fingerprint lock is now a third generation product. Due to their usefulness and wide-ranging use, the fingerprint locks became part of their participation in this year's extra-curricular scientific competition for university students at the starfire cup。
Believe it or not. During this year and a half of the year in which western electricity is sought, the scientific atmosphere of western electricity is deeply felt. In the various major competitions held in schools, he slowly transformed from a learner to a participant and won a third prize for the first year in the acm international program design competition. When it comes to homemade fingerprint locks, quintana says, "i love computer science, and the it industry can connect all walks of life, so that information can be shared and dead water turned into live water。
