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Spectrum Shield (Open hardware)

3 years ago 694
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Description

Description: The Spectrum Shield enables your Arduino with the capability of splitting a stereo audio input into 7-bands per channel. You can then read the amplitude of each channel using the ADC on your Arduino allowing you to control everything from LEDs to motors, pumps to relays, or even fire, all with sound. With this shield you will be able to have almost any project be able to react to music or sound!

The Spectrum Shield features the MSGEQ7 graphic equalizer display filter. Two of these ICs allow you to split a stereo audio input into 7-bands (per channel) and read the amplitude of each using the ADC on your Arduino. The shield is populated with two 1/8" stereo jacks (like you would find on a pair of headphones). One serves as a stereo input and the other is a pass-through output which allows you to connect the Spectrum Shield in-line between your audio source and your stereo system without interruption. This revision of the Spectrum Shield has been updated to the Arduino R3 layout but still requires you to solder on your own headers (check the Recommended Products section below). This shield can be used to create sound visualizers, detect patterns in music or add sound activation to your microcontroller projects.

GitHub (Example Code & Design Files) Sparkfun link:https://www.sparkfun.com/products/13116

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Documents

Spectrum_Shield_v15 SCH

Spectrum_Shield_v15 PCB

BOM

ID Name Designator Footprint Quantity
1 1000pF C1,C3 0603-CAP 2
2 33pF C2,C4 0603-CAP 2
3 0.1uF C6,C8,C5,C7 0603-CAP 4
4 200k R2,R1 0603-RES 2
5 JUMPER-3 AUDIO_IN 1X03 1
6 ARDUINO_R3_SHIELD U1 UNO_R3_SHIELD 1
7 FRAME-LETTER FRAME1 CREATIVE_COMMONS 1
8 330 R3 0603-RES 1
9 RED LED1 LED-0603 1
10 M02 JP2 1X02 1
11 M06 JP3 1X06 1
12 TAC_SWITCH S1 TACTILE_SWITCH_SMD 1
13 MSGEQ7 IC1,IC2 SOIC8 2
14 FIDUCIAL JP4,JP5 FIDUCIAL-1X2 2
15 AUDIO-JACK AUDIOJACK1,AUDIOJACK2 AUDIO-JACK-3.5MM-SMD 2
16 OSHW-LOGOM LOGO1 OSHW-LOGO-M 1
17 SFE_LOGO_FLAME.2_INCH LOGO2 SFE_LOGO_FLAME_.2 1
18 SFE_LOGO_NAME_FLAME LOGO3 SFE_LOGO_NAME_FLAME_.1 1

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