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The Haitronic HR0240 sound sensor detects the presence of sound or sounds at a specific frequency, without identifying their intensity. Sensitivity is adjusted using the blue digital potentiometer. When the sound level exceeds the set threshold, the digital OUT output goes low; when it is below the threshold, it goes high.
The output can be connected directly to a microcontroller to detect the signal level, or to a relay module to create a sound-activated switch. The board features a mounting hole and VCC, GND, and OUT terminals.
Specifications are collected from official manufacturer websites. Please verify the specifications before proceeding with your final purchase. If you notice any problem you can report it here.