Specification:
Product Type:VU Meter Driver Board DB Audio Level Meter
Input sensitivity: 400 Hz audio input signal with 8025B digital multimeter range.
Measurement AC mV, input: 97mV, 39 levels up to + 3dB position.
Power supply voltage: DC12V 0.12A.
PCB size: 63 x 52 x 20 mm / 2.48 x 2.05 x 0.79 inches.
Power supply connections for backlight: available from DCl0 to 12V 50MA. Power for small bulbs
Backlight
Drive VU meter, level meter sensitivity: recommended 500uA sensitivity, 630 ohms.
Resistance At this time, the damping effect is best, the other specifications of the level meter differ in the damping effect and need to be further adjusted.
Instructions:
1. Input part:
Lin, 0, Rin, is an audio signal input port for the CD audio output that is connected to the left
and to the right channel. Or an output port connected to the first input port
Selection level, the former should not be connected to the power amplifier output or volume
Potentiometer
2. Output part:
The two "+" and "—" terminals on the side of the VU meter should each be connected as an output to the "+" and -" terminals of a two-stage gauge.
Sensitivity recommendation of the controllable level meter: DC 100uA to 500uA. Do not exceed 1mA.
Board 2500 ohm blue 3296 series potentiometer can adjust the sensitivity of the two
Separate header. Clockwise, sensitivity can be improved.
LA, LB are the power supply connections for backlight, RA, RB is the other set power supply of the backlight
Supply clamp