Clap Switch Using Sound Sensor & Arduino

In this tutorial we are going to make a clap switch using a Sound Sensor & Arduino. Whenever you clap an LED will Turn On or Off. There is also a schematic below on how to use it with a relay and a light bulb.

Watch the Video!

• Arduino UNO (Or any other Arduino)
• Sound Sensor
• LED
• 1K ohm resistor
• Jumper wires
• Breadboard
• Visuino program: Download Visuino
• Optional a Relay and a light bulb

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• Connect Arduino digital pin [2] to 1K ohm resistor
• Connect 1K ohm resistor pin to LED positive pin [+]
• Connect Arduino pin [GND] to LED negative pin [-]
• Connect Arduino Analog pin [A0] to Sound Sensor pin [A0]
• Connect Arduino pin [5V] to Sound Sensor pin [VCC]
• Connect Arduino pin [GND] to Sound Sensor pin [GND]

• Connect Relay VCC pin(+) to Arduino 5V pin
• Connect Relay GND pin(-) to Arduino GND pin
• Connect Relay signal pin(S) to Arduino Digital pin [2]
• Connect power supply 12V (+) to the Lamp positive (+)
• Connect power supply 12V (-) to the relay pin (NO)
• Connect Lamp negative (-) to relay pin(com)

The Visuino: https://www.visuino.eu also needs to be installed. Download Free version or register for a Free Trial.

Start Visuino as shown in the first picture Click on the "Tools" button on the Arduino component (Picture 1) in Visuino When the dialog appears, select "Arduino UNO" as shown on Picture 2

• Add "Compare Analog Value" component
• Add "Detect Edge" component
• Add "Delay" component
• Add "Toggle(T) Flip-Flop" component
• Add "Digital Multi Source" component

• Select "CompareValue1" and in the properties window select "Compare Type" and set ctBigger
• Select "CompareValue1" and in the properties window select "Value" and set 0.52 <<This will be the sensitivity of the microphone, you can adjust the value from 0.50 up.
• Select "Delay1" and in the properties window set "Interval (uS)" to 10000

• Connect Arduino Analog pin [0] to "CompareValue1" pin [In]
• Connect "CompareValue1" pin [Out] to "DetectEdge1" pin [In]
• Connect "DetectEdge1" pin [Out] to "Delay1" pin [Start]
• Connect "Delay1" pin [Out] to "TFlipFlop1" pin [Clock]
• Connect "TFlipFlop1" pin [Out] to "DigitalMultiSource1" pin [In]
• Connect "DigitalMultiSource1" pin [0] to Arduino Digital pin [2]
• Connect "DigitalMultiSource1" pin [1] to "Delay1" pin [Reset]

In Visuino, at the bottom click on the "Build" Tab, make sure the correct port is selected, then click on the "Compile/Build and Upload" button.

If you power the Arduino module & clap the LED will turn On or Off.

Congratulations! You have completed your project with Visuino. Also attached is the Visuino project, that I created for this Tutorial, you can download it and open it in Visuino: https://www.visuino.eu