Function:
1. DC voltage between 5V and 12V can be operated with reverse polarity protection.
2. The VU meter is a voice-activated sensor, so no audio connection is required. Simply turn on the product. It flashes when a sound sounds.
3. The louder the sound, the more the LED lights up from bottom to top. When the sound fluctuates, the LED flashes with the music.
4. When using an independent comparator circuit, the structure and principle, although the circuit is slightly more complicated, are easier to understand.
5. Equipped with a reverse polarity protection diode, which can effectively prevent the circuit from burning out due to the reverse polarity of the power supply.
How to use:
In terms of signal input:
The board comes with a microphone, no audio signal needs to be connected, it can detect and receive an external sound source and control the flashing of the LED lamp beads. The downside is that the sensitivity is not as good as that of the line input and is easily affected by other external sounds.
If you need a line input, this step is about the audio signal (e.g. headphone power amplifier of a mobile phone or computer cannot be connected to the output of the power amplifier or speaker), you can remove the microphone and the signal is directly from the & nb
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