- VU Meter Sound Level Circuit
- Build Your Own 8-LED VU Meter Circuit – Power Levels Explained
- VU Meter 5: UAA180 Circuit Diagram & Build Guide
- Build Your Own Audio Analyzer Circuit Diagram
- Build Your Own VU Meter: LM3915 Circuit Diagram
- Build Your 10-LED Level Indicator Circuit (LM3915, TL071)
- VU Meter Circuit: Build Your 7.8V Level Indicator
- Build Your Own VU Meter: A 13-LED Circuit Design
- 74C14 Peak Indicator Circuit: Build Your Audio Level Meter
- Build Your 4dB Peak Indicator Circuit Diagram
- Three Level Audio Power Indicator Circuit Design
- Build Your Own LM3915 Sound Level Meter Circuit
Build Your Own LM3915 Sound Level Meter Circuit
Description
This ingenious noise measurement device serves as an ideal single-chip substitute for traditional analog meters. It is entirely composed of solid-state elements and is immune to wear and tear. The entire circuit relies on the LM3915 audio level integrated circuit and incorporates only a minimal number of external components.
Circuit diagram
Parts
- C1 2.2uF 25V Electrolytic Capacitor
- R1 1K 1/4W Resistor
- D1 1N4002 Silicon Diode
- LED1-LED10 Standard LED or LED Array
- U1 LM3915 Audio Level IC
- MISC Board, Wire, Socket For U1
Notes
- The positive supply voltage can vary from 3V to 20V.
- The input is tailored for conventional audio signal levels (1V P-P) and supports a maximum input voltage of 1.3V.
- Pin 9 can be severed from ground to facilitate the utilization of a moving indicator display instead of a bar graph presentation.
LM3915 Audio Level IC
The LM3915 is a versatile integrated circuit specifically designed for audio level measurement. This IC efficiently converts audio signals into proportional voltages, facilitating accurate level detection. It's characterized by its high sensitivity and low noise characteristics, making it suitable for a range of audio monitoring applications. The device typically operates from a supply voltage of 3V to 20V and provides a linear output signal that can be easily interfaced with other electronic components. It’s commonly used in sound level meters, audio recording equipment, and noise monitoring systems.
Security Warning
Incorrect wiring or component selection could potentially damage the circuit or pose a safety hazard. Always double-check your connections and ensure you understand the functionality of each component before powering up the circuit.