The degree to write this objective is to design the station bike lock with a digital system by using the four digits to lock and unlock using the device the microcontroller arduino UNO R3 in the control of the system to lock and unlock that have a keypad (keypad) 4x3-to get the data for the lock code number is a part of the display is displayed through the LCD screen mechanism to lock and unlock will use the servo motor in the chopper bars to lock and unlock