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Grove - Loudness Sensor

4 years ago 1137
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The Grove - Loudness Sensor is designed to detect the loudness of environmental sound. Based on amplifier LM2904 and a built-in microphone, it amplifies and filters the high frequency signal that received from the microphone, and outputs a positive envelop. This will make for Arduino’s signal acquisition. The output value depends on the level of sound input. In order to avoid unnecessary signal disturbances, input signal will go through two times’ filtering inside the module. Lastly, there is a screw potentiometer that enables manual adjustments to the output gain.

Features Grove compatible interface Wide supply voltage range Built-in signal filtering Gain adjustable via screw potentiometer

Specifications enter image description hereDocuments

Please visit our wiki page for more info about this product. It will be appreciated if you can help us improve the documents, add more demo code or tutorials. For technical support, please post your questions to ourforum.

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Grove-loudness sensor


ID Name Designator Footprint Quantity
1 NO J2 2.0_1X4 1
2 1uF C1,C5,C3 C0603 3
3 10k R1 R0603 1
4 LM2904DR U1 SO08 1
5 100k R2,R8 R0603 2
6 16K R3 R0603 1
7 4.7uF C2 C0805 1
8 560k R4 R0603 1
9 100nF C4 C0603 1
10 1k R7 3P-SQUA-7X6.8 1
11 microphone MIC1,MIC2 2P-D8.9MM 2
12 NO U4 4P-SMD-2.95X3.76X1.1H 1
13 1K R5 R0603 1
14 10K R9 R0603 1
15 4.7pF C6 C0603 1
16 47K R6 R0603 1


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