LED Indicator Voice-activated Induction Power Amplifier Spectrum Audio Level Meter Board

Parameter 1 Size Length 10CM x Width 3CM 2 The lamp beads are 5MM round head and fog like LED the light is uniform and not dazzling multi color optional 3 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 by themselves 4 The signal sensitivity is adjustable and the onboard adjustable potentiometer can be adjusted for about ten turns You can hear sound inside the potentiometer when you adjust it to the end counterclockwise to decrease and clockwise to increase NOTE The louder the sound the more the LED will light up As the sound fluctuates the LED will jump with the music especially when playing DJ Using an independent comparator circuit is slightly more complicated but the structure and principle are easier to understand Equipped with anti reverse connection protection diodes which can effectively prevent the circuit from being burnt due to the reverse polarity of the power supply which is more suitable for DIY Regarding signal input the board comes with a microphone and does not need to be connected to an audio signal It can sense the flickering of the LED lamp bead by receiving an external sound source The disadvantage is that the sensitivity is not as good as the line input and it is easily affected by other external sounds If you need line input this step is about audio signals for exampl