Mic board
About the Mic board
Mic board is an open source PCB design by doug7410, published on GitHub under the MIT license. It is a 2-layer board measuring 20 × 38 mm, with 3 components from 3 distinct parts.
It belongs with the displays & leds and test & measurement designs in this gallery.
From the project
Build guide, BOM and hardware for the Now-Playing desk appliance: HUB75 spectrum + touch now-playing display driven by room-mic song recognition
Adapter that mounts the proven round INMP441 I2S MEMS breakout (Ø14 mm, two 1×3 rows at 7.62 mm) and brings it out to a 6-pin JST-XH matching the carrier board's JMIC` pinout, 1:1 cable:
- L/R is tied to GND on this board (left channel) — matches WLED-MM digitalmic.type=1 and the Board 1 smoketest wiring. - Mount the module label/port side up (chip side toward this board) on the supplied pin headers; the adapter's silk row labels then match the module's. The Ø3 mm center hole is acoustic relief so either mounting orientation works. - Two M3 holes, 14 mm apart, at the top corners.
Mic board bill of materials (BOM)
3 components, 3 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | B6B-XH-A(LF)(SN) MIC cable | JST_XH_B6B-XH-A_1x06_P2.50mm_Vertical | J1 |
| 1 | INMP441 L/R-WS-SCK | PinHeader_1x03_P2.54mm_Vertical | J2 |
| 1 | INMP441 GND-VDD-SD | PinHeader_1x03_P2.54mm_Vertical | J3 |
Mic board design files
The KiCad project lives in the doug7410/nowplaying-appliance repository on GitHub; these links point at the commit this page was built from.
Mic board: common questions
How big is the Mic board?
The Mic board measures 20 × 38 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the Mic board?
3 components, from 3 distinct parts, with part numbers taken from the project's own BOM. The full bill of materials is listed on this page.
Where can I download the Mic board design files?
From the doug7410/nowplaying-appliance repository on GitHub, which has the KiCad layout, the schematic and the BOM; the links under Design files point to each one.
Can I use the Mic board design in my own project?
Yes, under the terms of its MIT license, which doug7410 chose for the repository.
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