Grove - Volume sensor (LM2904) with microphone

Grove - Volume sensor

The Grove volume sensor is used to detect the volume of ambient noise. Based on the LM2904 amplifier and a built-in microphone, it amplifies and filters the frequency signal received from the microphone and outputs a positive signal curve. This enables signal acquisition by a microcontroller such as Arduino, ESP or Raspberry Pi. The output value depends on the level of the sound input. To avoid unnecessary signal interference, the input signal is filtered twice in the module. There is a screw potentiometer that allows manual adjustments of the output gain.

Features

• Improved functionality: Based on LM2904 - Dual 36 V 1.2 MHz operational amplifier with operation at -40 °C to 125 °C
• Wide supply voltage range: In the range from 3.2 V to 5.2 V
• Integrated signal filtering: The input signal is filtered twice in the module
• Adjustable output gain: A screw potentiometer that allows manual adjustment of the output gain
• Grove unit interface: The product ensures "plug and play" and is versatile for various Grove applications

Product specifications

What is Grove?

Grove facilitates connection, experimentation and simplifies the prototyping process. No jumpers or soldering are required. More than 300 Grove modules have been developed to cover a wide range of applications and fulfill a variety of requirements. Not only the hardware is open source, but also the software. Instructional PDF documents and a wiki are provided for Grove users (especially beginners). 

We offer various Grove Shields to enable connection to the Grove system with various microcontrollers. 

Parts list

• 1x Grove volume sensor
• 1x Grove cable