Turntable password locks are not common in China, and many schools and sports venues abroad are almost standard. The use of 3 groups of numbers as passwords requires twisting out digital locks in different directions. I remember when I first encountered this type of lock in the gym, the old lady asked her for a long time. She turned around and vaguely felt that she had turned on my ancestral white eyes. I wonder if Sammy Kamkar had the same experience as me. He released his unlock algorithm and manual unlocking tutorial a few weeks ago, which allows you to manually open any dial lock using a simple method. Kamkar has now released a home-made unlocker that automatically opens the lock in five minutes and publishes a detailed production tutorial on his own home page . The heart of this device is an Arduino Nano microcontroller, stepper motor and controller, Optical Rotary Encoder, and a 3D printed mold, which cost less than $100. A complete list of accessories and 3D printing modeling can be found on Kamkar's homepage. Are you ready to start a business and find a hint of inspiration? Topic: Master Lock
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