Mono LED VU meter Sound Meter + Microphone Preamplifier HK1523

This is a single function indicator designed with discrete elements.
The circuitry consists of a level indicator for low frequency signals.
The LED indicator is mono type. Dot bar type.
Input signal - electret microphone (included).
Input level control - trimmer-potentiometer.
12 LEDs.
Supply voltage DC - 9 to 15 V (max 120mA), (You can use the car battery).
Overall dimensions PCB 105x37mm (4.13"x1.45").
Overall dimensions PCB microphone amplifier 31x22mm (1.22"x0.86").

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