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A 3 or 4-pin small microphone sound sensor module is a type of sensor used to detect sound levels in its vicinity. :
3-pin microphone sound sensor module: This module typically consists of three pins - VCC (power supply), GND (ground), and OUT (signal output). It converts sound waves into electrical signals which can be measured by a microcontroller or other electronic circuits. The output signal can be analog or digital depending on the module. 4-pin microphone sound sensor module: This module usually has an additional pin compared to the 3-pin version. The fourth pin may serve a specific purpose such as providing a digital output signal (like a digital sensor or switch) or offering additional functionalities like adjustable sensitivity.
1 x 3 Or 4 Pin Small Microphone Sound Sensor Module
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