Arduino-Based VU Meter

https://www.electronics-lab.com/arduino-based-vu-meter/

The voice unit (VU) meter is a device that displays a representation of the signal level in audio equipment. It is used in some consumer audio equipment for utilitarian purposes such as in recording devices or for aesthetics like playback devices. The original VU meter is a passive electromechanical device, but using a few LEDs […]