VU meter circuit lm3915 wiring diagram

Hey, guys in today's article I am going to make a VU meter circuit

Understanding the VU Meter Circuit

A VU meter, or Volume Unit meter, is an indispensable tool in audio engineering, providing a visual representation of sound levels. In this guide, we'll delve into the intricacies of building your own VU meter circuit, offering a step-by-step approach and insights into its functionality.

Not a circuit diagram

What is a VU Meter?

Before diving into the technicalities, let's grasp the essence of a VU meter. Essentially, it's a device designed to measure and display the volume of audio signals. Whether you're an audiophile or a DIY enthusiast, constructing a VU meter circuit opens avenues for enhancing your audio setup.

Components Required

To embark on this project, gather the following components:

  • LM3914 IC
  • Resistors: 1.5k, 33k
  • BC557 Transistors (10 pieces)
  • 5mm LEDs (64 pieces)

Procuring Components

Procuring the components is hassle-free; they're readily available at local electronics stores or online platforms. Opting for online purchases streamlines the process, ensuring convenience and accessibility.

Schematic Diagram

Visualizing the circuit layout is paramount for seamless assembly. While the number of LEDs may vary, a typical VU meter comprises an array of LEDs serving as indicators for varying sound levels.

PCB Design for Efficiency

For optimal efficiency, we provide a PCB design tailored for compact elegance. By leveraging our Gerber file, you can effortlessly order a customized PCB, expediting the project timeline.

PCB Design for Compact Elegance

Crafting the circuit is a breeze with our meticulously designed PCB. Simply download the Gerber file, and with JLCPCB's seamless ordering process, materialize your project swiftly. As a bonus, first-time registrants can benefit from a $30 coupon code, enriching your PCB creation journey.

Seize the Opportunity with JLCPCB

Partnering with JLCPCB, we extend an exclusive offer to new users. Claim your $30 coupon code upon registration, facilitating your PCB procurement and SMT service. Don't miss out on this invaluable opportunity to elevate your electronics endeavors.

Further Resources

For comprehensive understanding and visual guidance, explore our accompanying video tutorial. Additionally, stay tuned for an upcoming article elucidating the intricate workings of the VU meter circuit.


For further inquiries or clarifications, feel free to reach out. We're committed to empowering your DIY journey.


In essence, constructing a VU meter circuit not only enhances your audio setup but also serves as a gratifying DIY endeavor. With readily available components and our comprehensive guide, embark on this journey with confidence, and elevate your audio experience to new heights.

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