Voice Control Inductive Amplifier Spectrum Audio Level Meter LED Indicator Flash Melody Light Audio CompanionItem NO.: SUNLEPHANT0007

Mono Voice Control Level Indicator

Product Parameters:

1. Size: 10cm long * 3cm wide;

2. Lamp bead: 5mm round head fog LED, uniform light without dazzling (multi-color optional);

3. Power supply: DC between 5V and 12V can be used. The board comes with a microUSB socket, which can be plugged into the corresponding mobile phone charging cable for power supply. Two pad openings are also reserved for users to lead wires by themselves;

4. The signal sensitivity can be adjusted. The on-board adjustable potentiometer can be adjusted for about ten turns. When the potentiometer is adjusted to the end, you can hear a tick inside the potentiometer. The counter clock is reduced, and the clockwise clock is increased;

Product Introduction:

The louder the sound, the more LED lights up from the bottom to the top. As the sound fluctuates, the LED will also jump with the music, especially when playing DJ.

The circuit of independent comparator is slightly complicated, but its structure and principle are easier to understand.

With anti-reverse connection protection diode, it can effectively prevent the power supply polarity from being reversed, which will lead to the burning of the circuit. It is more suitable for DIY.

About signal input: the board has its own microphone, which does not need to connect audio signals. It can sense and receive the external sound source to control the flashing of LED lamp beads. The disadvantage is that the sensitivity is not as good as the line input, and it is easy to be affected by other external sounds.

If line input is required, this step is about audio signal (for example, the headphone hole of a mobile phone or computer is not allowed to connect to the output of the power amplifier or the speaker). The microphone can be removed, and the signal is directly introduced from the microphone. If the light is on, adjust the potentiometer (lower counterclockwise). This connection is recommended.