Info:

A very useful tool that equips Hi-Fi amplifiers is known as the VU-meter. With its help, the saturation input thresholds can be detected, the powers on the two stereo channels can be equalized, the signal levels can be measured, etc. Portable emission circuit check circuit.

The presented project represents an indicator level of the audio signal. It works on the principle of successive ignition of them.

As can be seen in the diagram, as visual indicators we have 5 5mm LEDs. The LEDs can also be chosen in different colors for easy evaluation of the measurement. The LEDs are moving to the beat of the music. Very small portable VU-meter with 5 LEDs that light up to the rhythm of the music. Built-in microphone condenser.

The 250k RV1 potentiometer helps to change the received input signal.

Features:

5x 5mm colored LEDs

Built-in microphone condenser

Adjustable sensitivity

Power supply with 3V CR2032 type battery

Have fun with it !