Level meter, VU meter, a small table-driven power amplifier board, a professional audio amplifier chip.
Features:
An integrated circuit chip that's specially designed for audio level testing, includes the square root of a dynamic index compression circuit (e.g.: Input 1V, 1V; input 4V, 2V; input 9V, 3V).
Considering dynamism and precision, the instruction pointer oscillates moderately, avoiding the small signal pointer does not move, the large signal pointer backing of the state.
Doesn't require independent power supply, it uses original power supply leads.
As compared with TA7318P / TA7332P, the cost of transformer is reduced, and takes up less space, hence more convenient and flexible installation.
Install low—pass filter circuit to filter out high frequency interference, supply power in harsh environments(such as car audio system).
Adjustable output sensitivity, suitable for different sizes of header.
Common 12V DC power supply, easy to use in-vehicle device and PC computers.
Has a power reverse polarity protection.
Provide energized pointer protection for boot pointer base, extend header life.
Use 0.5W metal film resistors, large power margin to ensure reliable and stable work for long hours.
Specifications:
Material: PCB
Input Sensitivity: 400Hz input audio signal(use Fluke 8025B digital multimeter to measure AC mV, input: 97mV, 39 level meter to + 3dB position.)
Power supply voltage: DC12V / 0.12A
Backlight power supply terminals: DCl0 to 12V, 50mA. Power for small bulbs backlighting.
Drive VU meter, level meter Sensitivity: 500UA sensitivity, 630 European resistance recommended. This is the best damping effect, otherwise it needs further adjustments.
Note: 12V DC supply voltage must be ensured.
Item Size: 6.4 * 5.3cm / 2.51 * 2.08in
Item Weight: 37g / 1.3oz
Package Weight: 37g / 1.3oz
Package Size: 15 * 10 * 2cm / 5.9 * 3.93 * 0.78in
Packing List:
1 * VU Meter Driver Board