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Bone conductor

sharebrained·bone-conductor·hardware/bone_conductor_black/bone_conductor_black.net

This repository ships a schematic but no board layout.

About the Bone conductor PCB

Bone conductor is an open source PCB design by sharebrained, published on GitHub under the GPL-2.0 license. It is a board, with 72 components from 22 distinct parts.

Other key parts include the WM8731SEDS, ON_CAT24C256 and ADP151AUJZ-3.3-R7. By type, the board carries 36 resistors, 24 capacitors, 4 connectors, 4 test points, 3 ICs and 1 crystal.

It belongs with the audio designs in this gallery.

From the project

BeagleBone audio cape hardware

BeagleBone Black audio cape, with a stereo line input, stereo line and headphone outputs, and optional mono microphone input with electret bias. The codec is interfaced directly to the digital audio interface of the BeagleBone black, allowing for extremely low latency audio I/O.

Built around a Wolfson WM8731 codec, supporting stereo sampling rates from 8kHz to 96kHz. Headphone output power is 30mW into 32 Ohms.

Main components on the Bone conductor

WM8731SEDSON_CAT24C256ADP151AUJZ-3.3-R7

Bone conductor bill of materials (BOM)

72 components, 22 distinct parts.

QtyPartRefs
1
WM8731SEDS
U1
1
ON_CAT24C256
U2
1
ADP151AUJZ-3.3-R7
U3
1
12M288
X1
1
BEAGLEBONE_BLACK
J1
3
TRS_JACK
P2, P3, P4
4
TP
TP1, TP2, TP3, TP4
6
100N
C1, C5, C8, C9, C12, C13
9
10U
C2, C3, C4, C6, C7, C14, C15, C22 +1
2
220U
C10, C11
2
220P
C18, C19
2
1U
C20, C21
1
DNI
C23
2
15P
C25, C26
5
10K
R1, R2, R3, R4, R21
6
5K6
R5, R6, R14, R15, R17, R18
4
47K
R7, R8, R11, R12
3
100R
R9, R10, R25
3
0R
R16, R33, R36
9
DNI
R22, R23, R24, R26, R32, R34, R35, R37 +1
Show 2 more
QtyPartRefs
5
33R
R27, R28, R29, R30, R31
1
1M
R39

Bone conductor design files

The KiCad project lives in the sharebrained/bone-conductor repository on GitHub; these links point at the commit this page was built from.

Bone conductor: common questions

How many components are on the Bone conductor?

72 components, from 22 distinct parts. The full bill of materials is listed on this page.

Where can I download the Bone conductor design files?

From the sharebrained/bone-conductor repository on GitHub, which has a netlist; the links under Design files point to each one.

Can I use the Bone conductor design in my own project?

Yes, under the terms of its GPL-2.0 license, which sharebrained chose for the repository.

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