What is it?

Introducing our RotarySecure: Mini Combo Padlock Board w/ OLED, the perfect security solution designed for both hobbyists and professional engineers. This compact board combines a Miniature 0.42" OLED Screen with a Mini Rotary Encoder w/ Push Button, into an user-friendly interface with robust security features to offer a versatile digital locking signal suitable for a wide range of applications. (See Demo Video Below)

Key Features

• Display and Input: Equipped with a 0.42-inch OLED screen, this RotarySecure board provides clear, real-time feedback on lock status and input. A mini rotary encoder with push-button functionality allows for smooth and intuitive input of the 4-digit combination code, enhancing user experience.

• LOCK Pin Output: The RotarySecure board includes a LOCK pin that outputs the lock status; HIGH when locked and LOW when unlocked. This feature allows for easy integration with external systems, providing immediate feedback on the lock’s status. This status pin can be used by a microcontroller to enable / disable functionality of external systems.

• User-Defined Code: Users can easily set and change the 4-digit combination code. This flexibility ensures that security can be updated as needed without any technical complications. A discrete switch on the back of the PCB enables the user to enter the setup mode for the combination code. This ensures that code setting is straightforward but secure from accidental changes. The user can also de-solder a 0R resistor to disable the code-changing feature and enhance the security.

• EEPROM Memory: The onboard EEPROM securely stores the combination code and the lock status. This ensures that all settings are preserved even when the power is turned off, providing reliable performance through power interruptions.

The RotarySecure board has the following pinouts:

• VIN: 3.3V to 5V
• LOCK: Lock status output pin. HIGH when locked and LOW when unlocked.
• GND

Potential Use Cases:

• Secure Storage: Ideal for locking cabinets, drawers, or boxes where sensitive documents, valuable items, or tools are stored. The board can be integrated into existing storage solutions by combining it with an MCU that controls a Solenoid Door / Cabinet Lock Assembly Breakout to enhance security.

• Automated Medicine Dispensers: Employ the board in a controlled medicine dispenser system, where access to medication is granted only after the correct code is input. This could be particularly useful in settings where medications need to be securely stored and accessed by specific individuals at predetermined times.

• DIY Projects and Prototyping: Perfect for hobbyists looking to add an enable / disable access to their projects.

• Interactive Escape Rooms: Use the RotarySecure Padlock Board to create custom combination locks for escape room challenges. Each lock can control a different puzzle or prop, adding a layer of interactivity and complexity to the escape room experience.

• Access Control Systems: Can be integrated with Mini Stepper Linear Sliding Metal Actuator (Ver B), to create unique mechanical mechanisms that can be enabled or disabled.

If instead of this mini padlock, you are looking for a WiFi-enabled door / cabinet locking solution, check out our ESP-12F WiFi Remote Door / Cabinet Lock Dev Board