SparkFun
SparkFun Spectrum Shield
The SparkFun Spectrum Shield splits a stereo audio input into 7 frequency bands per channel using two MSGEQ7 graphic equaliser ICs. Read the amplitude of eac...
The SparkFun Spectrum Shield splits a stereo audio input into 7 frequency bands per channel using two MSGEQ7 graphic equaliser ICs. Read the amplitude of each band via your Arduino's ADC to create sound-reactive projects — from LED visualisers and light shows to sound-activated motors, relays, and more.
The shield features two 3.5 mm (1/8″) stereo jacks: one for audio input and one as a pass-through output, allowing you to connect it in-line between your audio source and speakers without interruption. Updated to the Arduino R3 layout.
Key Features
- Dual MSGEQ7 ICs – 7-band frequency analysis on both left and right channels
- Stereo Input – 3.5 mm jack for audio source connection
- Pass-Through Output – 3.5 mm jack to forward audio to speakers/headphones
- Arduino R3 Layout – Standard shield form factor
- ADC Readable – Band amplitudes read directly via Arduino analogue pins
Ideal For
- Audio visualisers and LED light shows
- Sound-reactive art installations
- Music pattern detection
- Sound-activated projects (motors, relays, lighting)
Package Contents
- 1× SparkFun Spectrum Shield (headers not included)
Resources
Jargon buster
Plain-language definitions for the technical terms used above.
- ADC
- An analogue-to-digital converter reads a changing voltage and turns it into a number the microcontroller can use. It matters when connecting analogue sensors such as light, sound, or variable-resistor sensors.
- Headers
- Rows of metal pins used to plug a module into a breadboard or connect it with jumper wires. Pre-soldered headers make the module easier to use straight away without needing to solder the pins yourself.
- LED
- A light-emitting diode is a small electronic component that lights up when current flows through it in the correct direction. In this kit, LEDs create the flashing effect, so polarity and correct soldering matter for the project to work.
- Shield
- An add-on board that plugs into a main controller board to give it extra features such as sensing, motor control or communication. Knowing a product supports shields helps you judge whether it can connect neatly into an existing maker-board setup.
Find this product in
Audio & Video
Brands
Spectrum Shield Schematic
Schematic · 91.3 KB · Click any page to view full size
MSGEQ7 Datasheet
Datasheet · 145.5 KB · Click any page to view full size
MSGEQ7 Application Notes
Datasheet · 181.5 KB · Click any page to view full size
Supplier page — sparkfun.com
Supplier Description · 810.0 KB · Click any page to view full size
Resources & Downloads
Guides, code examples, and more
Related Tutorials
Free guides on learn.littlebird.com.au
