35mm VU Meter Stereo Audio Indicator with Backlight - 2 Pack for DIY Audio enthusiasts

About this item

• Instructions :AC 12V is the power supply, L, G, R: This is the dual-channel input terminal for the low-level signal of the driver board, which is used to connect the audio of the mobile phone, computer sound card, preamp, and other audio source equipment. The adjustable resistance "5K- V" is to adjust the brightness of the backlight, and the adjustable resistors "5OK-1 and 50K-2" control the beating amplitude of the pointers of VU meter 1 and VU meter 2 respectively.
• Product Information: This kit adopts the mature 5th generation front-level driver board plus classic backlight 35mm VU meter head, with driver board, suitable for telephone, computer, preamplifier, Mp3. VU meter backlight voltage: AC6V-12V DC current; 500uA +-15% DC internal resistance: 650 ohm + -15% Working temperature: -22%-55 degrees Celsius
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• Debugging instructions: Check the accuracy of the level meter by using a signal generator to produce a 1KHz signal at 0.775v. Connect the signal to the driver board and calibrate the meter to 0DB on the instrument panel. For the VU meter, connect audio signal to the driver board and adjust the resistance for synchronization between sound and pointer movement within a moderate range.
• Attention: Do not connect the output DC12V backlight voltage to the wrong VU meter when connecting the cable, because the current will burn out the meter head. It cannot be connected to the output of the power amplifier, including the car CD player.