How to Make Audio Level Indicator

Introduction: How to Make Audio Level Indicator

About: Electronics Enthusiast and a Software Engineer

Audio Level Indicator is a device which shows the level of audio by glowing the leds with respect audio amplitude.

In this Instructable , I will Instruct to make your own Audio level indicator with LM3915 IC and some LEDs. We can use colorful LEDs to Indicate Intensity.

The LM3915 datasheet specifies that the IC is a monolithic integrated circuit that senses analog voltage levels and drives ten LEDs, LCDs or vacuum fluorescent displays, providing a logarithmic 3 dB/step analog display. One pin changes the display from a bar graph to a moving dot display. LED current drive is regulated and programmable, eliminating the need for current limiting resistors. The whole display system can operate from a single supply as low as 3V or as high as 25V.

subscribe my youtube channel [Click Here] and Visit my website Electronics Projects Hub

Lets gets started...

Step 1: Components Required

Breadboard - 1 [ Banggood ]

LEDs [ Banggood ]

Red LEDs - 4

Green LEDs - 4

Blue LEDs - 2

3.5mm jack - 1 [ Banggood ]

LM3915 IC - 1 [ Aliexpress ]

10K Pot - 1 [ Banggood ]

1k Resistor - 1 [ Banggood ]

Jumper wires [ Banggood ]

Other (optional)

Multimeter [ Banggood ]

VU Meter kit [ Banggood ]

Step 2: Watch Video First!

This video gives you all the information you need to build your own audio level indicator.

During the next steps however I will present you some additional information to make the project even more simpler.

Step 3: Circuiting

Here you can find the circuit on breadboard.

You can see my breadboard traces and it is easy to understand while making.

Place all the components on the breadboard according to schematic.

Circuit is attached , you can download.


Step 4: You Made It!

That's all guys you made it.

Feel free to comment.

For more projects and tutorials subscribe my youtube channel [Click Here]

Visit my website Electronics Projects Hub

Invention Challenge 2017

Participated in the
Invention Challenge 2017

Makerspace Contest 2017

Participated in the
Makerspace Contest 2017

Explore Science Contest 2017

Participated in the
Explore Science Contest 2017

Be the First to Share


    • Anything Goes Contest

      Anything Goes Contest