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Bone conduction hearing aid

kishantm1·bone-conduction-hearing-aid-pcb·kicad_project/BioEHS Cone Conduction Hearing Aid Headphone PCB.kicad_pcb

Bone conduction hearing aid PCB layout, top view — open source ESP32 board by kishantm1

About the Bone conduction hearing aid PCB

Bone conduction hearing aid is an open source ESP32 PCB design by kishantm1, published on GitHub. It is a 2-layer board measuring 40 × 30 mm, with 28 components from 22 distinct parts.

Its main chip is the ESP32-S3-WROOM-1, from the ESP32 family. Other key parts include the MCP73831T-2ACI/OT, AP2112K-3.3 and MAX98357A. By type, the board carries 10 capacitors, 6 resistors, 4 ICs, 4 connectors, 2 switches and 1 microphone.

It belongs with the audio, power & battery and iot & wireless designs in this gallery.

From the project

Wearable bone conduction hearing aid / headphone PCB based on ESP32-S3 integrating I2S MEMS microphone input, amplified transducer output, LiPo battery charging, and Bluetooth audio support

Wearable bone-conduction hearing aid headphone PCB based on the ESP32-S3, integrating an I2S MEMS microphone input, I2S audio amplifier output, LiPo battery charging, USB-C power/programming support, and a bone-conduction transducer interface. This project focused on end-to-end wearable audio hardware development, including BOM creation, schematic design, PCB layout, and board assembly through JLCPCB.

Main components on the Bone conduction hearing aid

MCP73831T-2ACI/OTAP2112K-3.3ESP32-S3-WROOM-1MAX98357A

Bone conduction hearing aid bill of materials (BOM)

28 components, 22 distinct parts.

QtyPartRefs
1
MCP73831T-2ACI/OT
MCP73831T-2ACI_OT
Microchip Technology
U1
1
AP2112K-3.3
U2
1
ESP32-S3-WROOM-1
U4
1
MAX98357A
U5
1
USB_C_Receptacle_USB2.0_16P
J1
1
Conn_01x02
J2
1
Conn_01x02
J3
1
Conn_01x05
J4
1
ICS-43434
MK1
1
Boot
SW1
1
Reset
SW2
1
LED
D1
2
4.7u
C1, C2
3
1u
C3, C4, C11
3
100n
C7, C8, C12
1
10u
C9
1
.1uF
C10
1
10k
R1
2
5.1k
R3, R4
1
5.6k
R5
Show 2 more
QtyPartRefs
1
1k
R6
1
100k
R7

Bone conduction hearing aid design files

The KiCad project lives in the kishantm1/bone-conduction-hearing-aid-pcb repository on GitHub; these links point at the commit this page was built from.

Bone conduction hearing aid: common questions

What microcontroller does the Bone conduction hearing aid use?

The Bone conduction hearing aid is built around the ESP32-S3-WROOM-1, from the ESP32 family.

How big is the Bone conduction hearing aid PCB?

The Bone conduction hearing aid measures 40 × 30 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Bone conduction hearing aid?

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

Where can I download the Bone conduction hearing aid design files?

From the kishantm1/bone-conduction-hearing-aid-pcb repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the Bone conduction hearing aid design in my own project?

The repository has no license, so all rights stay with kishantm1. Use it as a reference, and ask the author before reusing the design.

Can I test firmware for the Bone conduction hearing aid without the hardware?

Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug ESP32 firmware against it before you order a PCB.

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