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The VU meter is a voice-activated sensor, so there is no need to connect audio, just power on the product, it will flash when there is a sound.
Using an independent comparator circuit, although the circuit is slightly more complicated, the structure and principle are easier to understand.
Equipped with anti-reverse connection protection diode, which can effectively safeguard the circuit from being burnt due to the reverse polarity of the power supply.
DC voltage between 5V and 12V can be powered, with reverse connection protection.
The louder the sound, the more the LED will light up from bottom to top. As the sound fluctuates, the LED will flashing with the music.
Specification
Item Type: VU Meter
Material: Plastic
Size: Length 10 x 3cm(3.94 x 1.18in)
Lamp Beads: 5mm(0.20in) Round Head Fog-like Led, Uniform and Not Dazzling；
Power Supply: DC 5V-12V is Available, the Board Comes with a Microusb Socket, You Can Use the Corresponding Mobile Phone Charging Cable to Plug in the Power Supply, and 2 Pad Ports Are Reserved for Users to Lead Their Own Wires;
LED Lighting: Three-Color Mixed Light
Color: As picture shown
Package List
1 x VU Meter
Note
The signal sensitivity is adjustable, the on‑board adjustable potentiometer can be adjusted for about ten turns, and you can hear a tick inside the potentiometer when you adjust it to the end, counterclockwise to decrease, clockwise to increase.
