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Secret Clap Door Lock

Contributed By - Yug Ajmera

Aim

To build a secret door lock that can be unlocked via clap.

Hardware Used

  • Arduino Uno
  • Bread Board
  • LED ( any color)
  • Resistor ( 10K )
  • Jumper wire (for conncetions )
  • Sound sensor module

Sound sensor module :-

The sound sensor module provides an easy way to detect sound and is generally used for detecting sound intensity. This module can be used for security, switch, and monitoring applications. Its accuracy can be easily adjusted for the convenience of usage. It uses a microphone which supplies the input to an amplifier, peak detector and buffer. When the sensor detects a sound, it processes an output signal voltage which is sent to a microcontroller then performs necessary processing.

Resistor

Software & Working

Here we are glowing an LED instead of opening a lock for simplicity. You can use a servo motor to open a lock. If a particular pattern of claps is detected , only then the lock will open . For this we are using a sound sensor module. In normal state , the sensor gives HIGH . As soon as a clap is detected , it gives LOW .

Access the code here