Summary of AVR Security Keypad Lock using ATtiny2313 microcontroller
The Security Keypad Lock Project uses an ATtiny2313 microcontroller to implement a simple code-based access control suitable for doors, safes, or vehicles. It accepts passwords and can drive external hardware (like an electric strike) to grant access, offering a low-cost AVR-based solution adaptable to many protection needs.
Parts used in the Security Keypad Lock Project:
- ATtiny2313 microcontroller
- Keypad (matrix input)
- Power supply (appropriate voltage for ATtiny2313)
- Driving transistor or MOSFET for external actuators
- Electric door strike or similar actuator
- Wiring and connectors
- Optional pull-up or pull-down resistors
- PCB or prototyping board
The Security Keypad Lock Project is a basic access control system based on ATtiny2313. It can be modified to protect just about anything. The “Code Lock” ability will allow the rightful user to deploy the platform to any property that requires simple password-protection.

The “AVR” RISC microcontroller used ensures low costs. Possible applications may include: vehicle protection, electronic safes, powered door locks. The following short treatise will explain how the early version was engineered and how to use the controller to accept valid passwords. With a little external hardware, the featured systems may easily be used to disengage an electric door strike or similar system.
For more detail: AVR Security Keypad Lock using ATtiny2313 microcontroller
- What microcontroller is used in the project?
The project uses an ATtiny2313 AVR RISC microcontroller. - What functionality does the Code Lock provide?
The Code Lock allows the controller to accept valid passwords to grant access. - What applications are suggested for this system?
Suggested applications include vehicle protection, electronic safes, and powered door locks. - Can the system drive external hardware like an electric door strike?
Yes, with a little external hardware the system can be used to disengage an electric door strike or similar device. - Why is the AVR microcontroller chosen?
The AVR RISC microcontroller ensures low costs for the system. - Is the design adaptable to protect different types of property?
Yes, the system can be modified to protect just about anything that requires simple password protection.
