LM3914 / LM3915 10-LED VU Meter Sound Level Indicator PCB Board (Bare PCB)
This PCB is designed for building a 10-LED audio level indicator (VU meter) using LM3914 or LM3915 IC. Display response depends on components used and calibration.
Working Voltage:
Supply range: +9 V to +18 V DC
Recommended supply: +12 V DC
Can be operated using +9 V or +12 V battery
Signal Input:
Audio signal input from speaker output (connected in parallel to signal input terminals)
Sensitivity adjustable using onboard preset (RV1)
Display Configuration:
Supports 10 LEDs (3 mm or 5 mm)
Bar mode operation enabled (Pin 9 connected to positive supply)
IC Compatibility:
LM3914, LM3915
Board Specifications:
PCB dimensions: 38 mm × 72 mm (1.5 inch × 2.8 inch)
PCB thickness: 1.6 mm
Compact layout
Construction:
Bare PCB (components not included)
Designed for through-hole components
Components are commonly available
Configuration:
Requires external LEDs and components for operation
Display response depends on signal level and calibration
Intended Use:
Audio signal level indication in amplifier systems
Visual audio monitoring for DIY projects
Integration in speaker systems and audio equipment
