HardLabs

Open DPOAE Interface

bnahill·audiopulse-embedded·hw/rev2/audio_iface_rev2.kicad_pcb

Open DPOAE Interface PCB layout, top view — open source STM32 board by bnahill
Simulate this board

About the Open DPOAE Interface PCB

Open DPOAE Interface is an open source STM32 PCB design by bnahill, published on GitHub under the GPL-3.0 license. It is a 4-layer board measuring 58.4 × 43.2 mm, with 78 components from 31 distinct parts.

Its main chip is the STM32H743VITx, from the STM32 family. Other key parts include the USBLC6-2SC6, USB3300-EZK, ADAU1772, LP5907MFX-3.3 and LP5907MFX-1.8. By type, the board carries 40 capacitors, 12 resistors, 9 test points, 7 ICs, 4 connectors and 2 crystals.

It belongs with the audio designs in this gallery, and the repository also holds 1 earlier revision of it.

From the project

Miniature DPOAE infant hearing loss screening device

Android HiFi DPOAE Audio Interface ===================

This is part of the Sana AudioPulse project and may someday be officially moved over there.

The basic objective is an audio interface for an Android phone to output high-fidelity audio (two channels) to an earpiece and to record back audio from a microphone in the earpiece. As the features-of-interest in the response are below 0dB SPL, this requires very high precision.

Main components on the Open DPOAE Interface

USBLC6-2SC6STM32H743VITxUSB3300-EZKADAU1772LP5907MFX-3.3LP5907MFX-1.8

Open DPOAE Interface bill of materials (BOM)

78 components, 31 distinct parts.

QtyPartRefs
1
USBLC6-2SC6
U1
1
STM32H743VITx
U2
1
USB3300-EZK
U3
1
ADAU1772
U4
2
LP5907MFX-3.3
U5, U7
1
LP5907MFX-1.8
U6
1
DSC6011JE1A-024.0000
X1
1
DSC6011CI2A-012.2880
X2
1
USB_B_Micro
J1
1
Conn_01x07
J2
1
Amphenol 20021122
J3
1
Screw_Terminal_01x02
J4
1
TP_USB_ID
TP1
8
TP
TP2, TP3, TP4, TP5, TP6, TP7, TP8, TP9
1
LG L29K-F2J1-24-Z
D1
1
LS L29K-H1J2-1-Z
D2
2
BLM18PG221SN1D
FB1, FB2
16
2.2u
C1, C2, C4, C5, C6, C7, C8, C9 +8
8
0.1u
C3, C12, C21, C24, C25, C27, C29, C30
3
1u
C11, C18, C20
Show 11 more
QtyPartRefs
6
100n
C13, C17, C22, C26, C28, C31
2
22u
C15, C16
4
10u
C19, C33, C36, C39
1
4.7u
C23
2
7.5
R1, R2
3
100k
R3, R10, R11
2
10k
R4, R5
1
820
R6
1
12k (1%)
R7
2
2k
R8, R9
1
0R
R12

Open DPOAE Interface design files

The KiCad project lives in the bnahill/audiopulse-embedded repository on GitHub; these links point at the commit this page was built from.

Open DPOAE Interface: common questions

What microcontroller does the Open DPOAE Interface use?

The Open DPOAE Interface is built around the STM32H743VITx, from the STM32 family.

How big is the Open DPOAE Interface PCB?

The Open DPOAE Interface measures 58.4 × 43.2 mm, has 4 copper layers and is 1.6 mm thick.

How many components are on the Open DPOAE Interface?

78 components, from 31 distinct parts. The full bill of materials is listed on this page.

Where can I download the Open DPOAE Interface design files?

From the bnahill/audiopulse-embedded repository on GitHub, which has the KiCad layout; the links under Design files point to each one.

Can I use the Open DPOAE Interface design in my own project?

Yes, under the terms of its GPL-3.0 license, which bnahill chose for the repository.

Can I test firmware for the Open DPOAE Interface without the hardware?

Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug STM32 firmware against it before you order a PCB.

More boards in audiopulse-embedded

Earlier revisions in the repo: audio_iface_rev1

Similar boards