2 layers
Mems mic board
araobp/acoustic-features
Acoustic features (MFSCs and MFCCs) for edge AI
8 parts45GPL-2.0
2 layers
Mems mic board
araobp/acoustic-features45Acoustic features (MFSCs and MFCCs) for edge AI
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 9
- Nets
- 41
- Pads
- 57
- Tracks, vias
- 56, 14
- Routed
- Yes
- KiCad
- KiCad 4
- Created
- 31 Oct 2018
- Updated
- 11 Sep 2023
Overview
Mems mic board is an open-source printed circuit board by araobp, from the araobp/acoustic-features repository on GitHub, published under the GPL-2.0 licence. It is a 2-layer board with 9 parts on 41 nets, routed with 56 tracks and 14 vias.
Its parts include 6 connectors and 3 ICs.
README
kicad/kicad_old/README.mdArduino shield with two Knowles MEMS microphones (PDM)
This is a ultra-cheap MEMS mic shield for edge AI. The total cost of all the parts is around $10.
Beam forming support
The board is equipped with two MEMS mics, and the distance between mic1 and mic2 is 20mm.
The reason why the distance is 20mm:
- the distance is good for acoustic event detection.
- 20mm = 2.54mm * 8, that is, it is suitable for DIP.
Parts
Schematic
Parts
9| Qty | Value | Footprint | References |
|---|---|---|---|
| 2 | Conn_01x08_Male | mcu:Pin Header 8P | J1, J5 |
| 2 | mems_mic | mcu:MEMS_mic | U2, U3 |
| 1 | Conn_01x01_Male | mcu:Pin_header_1P | J3 |
| 1 | Conn_01x04_Female | mcu:pin-socket-4p | J6 |
| 1 | Conn_01x06_Male | mcu:Pin Header 6P | J2 |
| 1 | Conn_01x10_Male | mcu:Pin Header 10P | J4 |
| 1 | tactile_sw | mcu:tactile_sw_4p | U1 |
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Questions
What parts does the Mems mic board use?
9 parts. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.
Where can I download the Mems mic board KiCad files?
From the araobp/acoustic-features repository on GitHub, at the commit this page was made from: the board is kicad/kicad_old/mems_mic_board.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Can I use the Mems mic board design in my own project?
Its repository publishes it under the GPL-2.0 licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).