Microduino Matrix Keyboard Coded Lock

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Outline Project: Microduino Matrix Keyboard Coded Lock Purpose: The course will show you how to make a matrix keyboard coded lock Difficulty: High Time-consuming: Five-hour Maker: Microduino Studio-ray Bill of Material Microduino Equipment Module Number Function Microduino-Core 1 Core board Microduino-USBTTL 1 Program download Microduino-OLED 1 For interactive display Microduino-Plug 1 Connect OLED Microduino-BM 1 Power supply Other Equipment Matrix keyboard 1 Interactive input Pegboard 1 Circuit Installation Servo 1 Encryption device control 3.7V Li-ion Battery 1 Power supply Wire 1 Circuit connection Schematic The matrix keyboard mentioned above is 4*3 while in this course is 4*4. The connector of the keyboard is showed as follows: Program [MicroduinokeyPadLockDoor] Debugging Step 1: Build circuit Connect to keyboard Stack modules: Connect OLED： Step 2: Download the code and run. If there is compiling error, you will need [keypad.zip] and restart IDE after download. Step 3: Usage： After powering on the coded lock, OLED will show “Password”. The initial password is “123456”. After you enter the code, it will display “Welcome” and the servo will turn 90 degrees and return to zero after five seconds, which means it has been opened. If wanting to change the code, you need to press “*”. OLED will remind you to enter the previous password before you want to change a new one. You can’t change the code when inputting wrong. Step 4: Then install Microduino-BM and the Li-ion battery and fixate to the drawer. Result The drawer can only be opened when entering correct password. You can also reset the password and save password when there is power-off. Video