HardLabs

Mic+MPU

irocobble·CA_LR_ES·Accoustic_Sensing_Node/Board1_2layers/Mic+MPU/Mic+MPU.kicad_pcb

Mic+MPU PCB layout, top view — open source board by irocobble

About the Mic+MPU PCB

Mic+MPU is an open source PCB design by irocobble, published on GitHub. It is a 2-layer board measuring 100 × 100 mm, with 78 components from 34 distinct parts.

Other key parts include the SX1262IMLTRT, PE4259, MIC2, MIC4 and AP63203WU. By type, the board carries 24 capacitors, 21 resistors, 15 diodes, 11 ICs, 3 connectors and 2 switches.

It belongs with the rf & radio, audio and iot & wireless designs in this gallery.

From the project

Open-source ESP32-S3 edge computing module with LoRa, GPS, external flash, MicroSD, and expansion support for long-range IoT applications.

Team: Aninda Majumdar (@irocobble) · Subham Basak · Kartik Kajra

A two-board, field-deployable acoustic sensor for search-and-rescue. The node is placed in rubble or debris and listens for signs of a trapped person (voice, tapping, banging). It works out which direction the sound came from and sends a GPS-tagged alert over LoRa to a rescue dashboard.

Searching collapsed structures is a race against time, and the hardest question is where to dig. Instead of sending people onto unstable rubble to listen, the node sends the ears in first.

Mic+MPU, from the project README
From the project README

Main components on the Mic+MPU

SX1262IMLTRTPE4259MIC2MIC4AP63203WUSipeed-M1AP63205WU

Mic+MPU bill of materials (BOM)

78 components, 34 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
SX1262IMLTRT
MIC1
Semtech
U1
1
PE4259
MIC3
Peregrine
U2
3
MIC2
U3, U5, U15
3
MIC4
U4, U6, U16
1
AP63203WU
U10
1
Sipeed-M1
U12
1
AP63205WU
U14
1
68000-108HLF
Conn_01x02
FCI
J1
1
68000-110HLF
Conn_01x02
FCI
J2
1
68000-108HLF
Conn_01x11
FCI
J3
1
Reset
SW3
1
Boot
SW4
14
ESD3.3
D1, D2, D10, D11, D13, D14, D15, D16 +6
1
Power
D3
1
LQW15AN9N1H00D
4.7uH
Murata
L5
1
4.7uH
L10
1
GRM155R71C473KA01D
0.1uF
Murata
C1
1
GJM1555C1H470JB01D
0.1uF
Murata
C2
6
0.1uF
C3, C55, C56, C60, C68, C69
2
GJM1555C1H3R3BB01D
0.1uF
Murata
C4, C10
Show 14 more
QtyPartRefs
1
GJM1555C1H5R6CB01D
10uF
Murata
C5
1
GJM1555C1H390JB01D
0.1uF
Murata
C6
1
GJM1555C1H2R4BB01D
0.1uF
Murata
C11
1
GRM155R71H104KE14D
22uF
Murata
C28
2
100nF
C31, C50
4
22u
C33, C36, C52, C54
1
22uF
C41
2
1uF
C59, C66
1
10uF
C64
7
10k
R1, R9, R10, R23, R33, R34, R35
1
CRCW06030000Z0EAHP
10k
Vishay/Dale
R2
2
CRCW0402100RFKED
10k
Vishay/Dale
R3, R4
1
CRCW0402220RJNED
1k
Vishay/Dale
R5
10
200 Ohm
R6, R7, R8, R11, R26, R27, R28, R29 +2

Mic+MPU design files

The KiCad project lives in the irocobble/CA_LR_ES repository on GitHub; these links point at the commit this page was built from.

Mic+MPU: common questions

How big is the Mic+MPU PCB?

The Mic+MPU measures 100 × 100 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Mic+MPU?

78 components, from 34 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+MPU design files?

From the irocobble/CA_LR_ES 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+MPU design in my own project?

The repository has no license, so all rights stay with irocobble. Use it as a reference, and ask the author before reusing the design.

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