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Sound Detector (Open hardware)

4 years ago 908
  • Description
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  • BOM
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Description

Description: The SparkFun Sound Detector is a small and very easy to use audio sensing board with three different outputs. The Sound Detector not only provides an audio output, but also a binary indication of the presence of sound, and an analog representation of its amplitude. The 3 outputs are simultaneous and independent, so you can use as many or as few as you want at once.

The envelope output allows you to easily read amplitude of sound by simply measuring the analog voltage. Gain can be adjusted with a through-hole resistor, to change the threshold of the binary (gate) output pin as well. Check the hookup guide below for more information about setting gain.

Each of the three output signals is present on the .1" header at the edge of the board. They are active simultaneously. If you aren’t using one in your particular application, simply leave that pin disconnected.

GitHub (Design Files) Sparkfun link:https://www.sparkfun.com/products/12642

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Documents

sound-detector SCH

sound-detector PCB

BOM

ID Name Designator Footprint Quantity
1 FRAME-LETTER FRAME1 CREATIVE_COMMONS 1
2 MIC MIC1 MIC-9.7MM 1
3 LMV324 IC1 SO014 1
4 IO Connector JP1 1X05 1
5 2.2k R1,R16 0603-RES 2
6 1K R2,R10,R13 0603-RES 3
7 100k R3,R11,R14 0603-RES 3
8 10K R4,R5,R6,R9 0603-RES 4
9 RB751 D1,D2 SOD-523 2
10 10uF C1,C2 1206 2
11 100 R8,R15,R18,R19 0603-RES 4
12 3.3k R12 0603-RES 1
13 RED D3 LED-0603 1
14 OSHW-LOGO LOGO1 OSHW-LOGO-M 1
15 LOGO-SFENW2 LOGO2 SFE-NEW-WEB 1
16 LOGO-SFESK LOGO3 SFE-LOGO-FLAME 1
17 1.0uF C4,C3 0603-CAP 2
18 Disable LED SJ1 SJ_2S 1
19 22K R7 0603-RES 1
20 GAIN R17 AXIAL-0.1EZ 1
21 STAND-OFF STANDOFF1,STANDOFF2 STAND-OFF 2
22 FIDUCIAL FID1,FID2 MICRO-FIDUCIAL 2

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