Accurate Acoustic Sensor – Sound Frequency to Voltage Converter

https://www.electronics-lab.com/accurate-acoustic-sensor-sound-frequency-to-voltage-converter/

The project presented here is a sensitive sound sensor. The circuit converts sound frequency and outputs DC voltage.  The board consists of LM358 OPAMP and LM2907 IC. LM358 is used as a dual-stage microphone preamplifier and LM2907 acts as a frequency to voltage converter. The circuit provides analog voltage output when it detects sound. The […]