12V Power Amplifier VU Meter Driver Board DB Audio Level Meter Electrical Circuitry Parts 0.1

• DIY Supplies:ELECTRICAL

Description:

 

1, Using imported integrated circuit chips, contains square root dynamic index compression circuit, taking into account dynamic and accuracy instructions, moderate pointer swing, to avoid small signal pointer does not move, large signal pointer swing beyond the limits.

 

2, Don't need independent power supply, occupy less internal chassis space, installation more convenient and flexible.

 

3, The input is equipped with a low-pass filter circuit, filter out high-frequency interference, suitable for harsh power supply environment (such as car audio system).

 

4, The output sensitivity is adjustable, suitable for a variety of specifications meter.

 

5, Used 12VDC power supply, easy to use in-car system and PC computers, with power supply reverse polarity protection ftion.

 

6, With pointer protection ftion, avoid pointer oscillations exceeding the limit in the boot moment, extend the life of the meter.

 

7, Using 0.5W metal film resistors, power margin, can ensure long-term continuous reliable and stable work.

 

 

Parameters:

 

Input Sensitivity: input 400Hz audio signal, measured with Fluke 8025B digital multimeter, AC mV tap position measurement, input is 97mV, 39 level meter pointer is +3dB position.

 

Power Supply : DC 12V, 0.2A or more.

 

PCB Size: 52mm x 63mm

 

Backlight Power Supply: DC 10-12V 50mA Available (use for small bulb backlight power supply)

 

VU Meter Sensitivity: Recommended 500UA sensitivity, 630 ohm resistance. at this point the damping effect of the best, other specifications of the gauge damping effect will be different, need to be further adjusted.

 

 

Notice:

 

1, The supply must be strictly guaranteed 12V DC, otherwise it will be easily to burn the protection circuit.

 

2, Wiring must be done in the case of power down, power operation can easily damage the circuit.

 

 

Packing List:

 

1pcs x VU Meter Driver Board