Project Idea
This project aims to provide a secure door locking system that operates from the inside, making the mechanical or electrical lock invisible and inaccessible from the outside to prevent break-ins. It uses encrypted RF signals to remotely unlock the door for authorized users, combining convenience with enhanced security for both domestic and commercial applications.
 
Project Description
Mechanical and electrical locks are vulnerable to physical attacks because they are exposed externally. This system secures the door by placing the lock inside, controlled remotely via an RF receiver and microcontroller. Only a specific encrypted RF signal from an authorized remote transmitter can unlock the door, ensuring that unauthorized access attempts fail. The microcontroller decodes the RF signals and activates the internal lock actuator, enabling keyless entry with high security.
 
Total List of Components
Microcontroller (8051 or ATmega328)
RF Transmitter Module (434 MHz)
RF Receiver Module (matching transmitter frequency)
Electromechanical lock or solenoid lock (for internal installation)
Relay module (to control the lock actuator)
Power supply (5V regulated DC)
Push button switches (for manual and reset functions)
LED indicators (for status)
Connecting wires, PCB or breadboard
Enclosure box for internal lock and electronics
 
Features
Secure internal locking mechanism not accessible from outside
Encrypted RF remote control prevents unauthorized access
Works for both domestic and commercial doors
Easy installation with standard RF modules and microcontroller
Low power consumption
Remote range typically 50-100 meters depending on environment
Visual indicators for lock/unlock status
 
Applications
Home security for front and back doors
Commercial office and shop door security
Remote door access control in warehouses
Any facility requiring secure remote locking from inside
 
Project Includes:
Fully assembled and tested circuit
Circuit diagram
Source code 
(For DIY KITs - only the components will be provided)
 
Project Types:
DIY KIT(Do IT YourSelf KIT) - We are providing only components in this kit for this project
DIY KIT with Code & Circuit Connections - Along with the components, you will get the Code and the Circuit Connections file to help you build the project easily.
Readymade Breadboard - We are providing fully assembled, tested and ready-made project using plug-n-play jumper wires and breadboard with all the other components, code & circuit diagram.
Readymade Soldered - We are providing fully assembled, tested and ready-made project soldered on a PCB with all the other components, code & circuit diagram.
 
Dimensions
Enclosure size (approx): 12 cm x 8 cm x 4 cm (depends on lock type)
RF module size approx: 2.1 cm x 2.5 cm
Relay module approx: 5 cm x 3 cm
 
Shipping Dimensions
Approximate Box dimensions: 20 cm x 15 cm x 8 cm
 
Weight
Estimated total project weight: 700 grams to 1 kg (including lock and enclosure)
 
Estimate Project Weight:1kg
Notes: All the products are made by LearnElectronics India and not for re-sale