YRREATY Double Pointer VU Meter Stereo Audio Amplifier Board,DB Sound Level Indicator Adjustable Backlight Driver Included

Debugging method:Method 1: Connect the power amplifier with the signal generator 1KHZ signal, adjust the volume of the power amplifier to the maximum, adjust the adjustable resistance, so that the meter pointer points to the 0 position This is a Double pointer VU meters with drive boards For 5W-50W amplifiers .The Power Supply Input is For The Backlight DC/AC 5-12V ＞0.1A;R1 And R2 Adjustable Resistance for Adjust Pointer jump;Notice :The Connect cable need you welding on the Driver board Method 2: No signal generator, you can use Android mobile phone to download the signal generator software, use the mobile phone to output 1KHZ signal to the power amplifier, adjust the power amplifier volume to the maximum, adjust the adjustable resistance, so that the meter pointer points to the 0 position