mkvenkit/mico210Open Source PDM to USB microphone based on the Raspberry PI RP2040.
Mico is an open-source printed circuit board by mkvenkit, from the mkvenkit/mico repository on GitHub, published under the MIT licence. It is a 2-layer board of 22.3 × 16 mm with 41 parts on 26 nets, routed with 380 tracks and 39 vias.
It is built around the RP2040, W25Q128JVSIQ and APA3010SECK, with the H130B-12.000-20-3050-EXT-TR among its other parts. Its parts include 19 capacitors, 8 resistors, 5 ICs, 2 connectors and 1 diode. It belongs with the audio and music boards and the RP2040 boards of this library.
Mico is an Open Source PDM to USB microphone based on the Raspberry PI RP2040.
You can read more about the design of Mico here:
In the firmware/ folder you will find the following UF2 files you can drag and drop on to Mico after you trigger the USB bootloader:
| Firmware | Function |
|---|---|
| pio_blinky.uf2 | Just blinks the LED |
| usb_microphone.uf2 | USB microphone |
| usb_microphone_blink.uf2 | USB microphone with LED blink |
My part of the software for Mico is released under the MIT Licence.
Hardware design files are licensed as:
This work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.
I am currently working on manufacturing Mico. Please feel free to build Mico for personal use. If you want to manufacture Mico for commercial use, please get in touch with me for licensing.
| Qty | Value | Footprint | References |
|---|---|---|---|
| 11 | 0.1uF | Capacitor_SMD:C_0402_1005Metric | C2, C4, C6, C7, C10, C11, C12, C13, C14, C15, C16 |
| 3 | 10K | Resistor_SMD:R_0402_1005Metric | R1, R3, R8 |
| 3 | 10uF | Capacitor_SMD:C_0402_1005Metric | C1, C5, C17 |
| 3 | 1uF | Capacitor_SMD:C_0402_1005Metric | C3, C8, C9 |
| 3 | Fiducial | Fiducial:Fiducial_0.5mm_Mask1mm | FID1, FID2, FID3 |
| 2 | 1K | Resistor_SMD:R_0402_1005Metric | R2, R7 |
| 2 | 27R | Resistor_SMD:R_0402_1005Metric | R4, R5 |
| 2 | 27pF | Capacitor_SMD:C_0402_1005Metric | C18, C19 |
| 1 | 470R | Resistor_SMD:R_0402_1005Metric | R6 |
| 1 | APA3010SECK | LED_SMD:LED_0402_1005Metric | D1 |
| 1 | H130B-12.000-20-3050-EXT-TR | Crystal:Crystal_SMD_5032-4Pin_5.0x3.2mm | Y1 |
| 1 | MCP1702 | Package_TO_SOT_SMD:SOT-23 | U1 |
| 1 | MP23DB01HPTR | mico:MIC_SPH0641LU4H-1 | U2 |
| 1 | RP2040 | mico:QFN40P700X700X90-57N | U4 |
| 1 | SWD Prog | mico:SMD_1x04_P1.27mm | J2 |
| 1 | TestPoint | mico:SMD_1x01_P1.27mm | TP2 |
| 1 | TestPoint_2Pole | mico:SMD_1x02_P1.27mm | TP1 |
| 1 | USB_A | mico:USB-A | J1 |
| 1 | W25Q128JV | mico:PSON50P300X200X60-9N | U3 |
| 1 | logo | mico:el_logo-9P4_3P1 | U5 |
It measures 22.3 × 16 mm and has 2 copper layers, 2 mm thick.
41 parts, built around the RP2040, W25Q128JVSIQ, APA3010SECK and H130B-12.000-20-3050-EXT-TR. 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.
From the mkvenkit/mico repository on GitHub, at the commit this page was made from: the board is pcb/ver0.1/mico.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Its repository publishes it under the MIT licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).
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