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Hidden Headphones Carrier Board v4

jrydin01·hidden-headphones

Hidden Headphones Carrier Board v4 layout, top view — open source ESP32 board by jrydin01

About the Hidden Headphones Carrier Board v4

Hidden Headphones Carrier Board v4 is an open source ESP32 PCB design by jrydin01, published on GitHub under the CC0-1.0 license. It is a 2-layer board measuring 55 × 29.5 mm, with 18 components from 15 distinct parts.

Its main chip is the ESP32 IO, from the ESP32 family. By type, the board carries 8 connectors, 4 switches, 1 diode and 1 resistor.

It belongs with the audio, iot & wireless and dev boards & breakouts designs in this gallery.

From the project

bone conduction headphones that sit on your collarbone, hidden under your shirt

Hidden Headphones is an open-source hardware project for a discrete, neckband-style bone conduction audio device. The electronics sit in a small rear enclosure while flexible wiring runs through the neckband to vibration pads positioned on the collarbone. The goal is a hands-free listening device that can be worn beneath a shirt.

This repository contains the design documentation, KiCad source files, firmware, bill of materials, and OpenSCAD enclosure model for the current prototype revision.

Hidden Headphones Carrier Board v4, from the project README
From the project README

Hidden Headphones Carrier Board v4 bill of materials (BOM)

18 components, 15 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
ESP32 IO
J1
1
ESP32 LED
J2
1
DAC I2S
J3
1
AMP L
J6
1
AMP R
J7
1
SPKR L
J8
1
SPKR R
J9
1
TP4056
J10
4
—
MH1, MH2, MH3, MH4
1
POWER
SW1
1
VOL+
SW2
1
VOL-
SW3
1
PLAY
SW4
1
STATUS
D1
1
1k
R1

Hidden Headphones Carrier Board v4 design files

The KiCad project lives in the jrydin01/hidden-headphones repository on GitHub; these links point at the commit this page was built from.

Hidden Headphones Carrier Board v4: common questions

What microcontroller does the Hidden Headphones Carrier Board v4 use?

The Hidden Headphones Carrier Board v4 is built around the ESP32 IO, from the ESP32 family.

How big is the Hidden Headphones Carrier Board v4?

The Hidden Headphones Carrier Board v4 measures 55 × 29.5 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Hidden Headphones Carrier Board v4?

18 components, from 15 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 Hidden Headphones Carrier Board v4 design files?

From the jrydin01/hidden-headphones repository on GitHub, which has the KiCad layout and the BOM; the links under Design files point to each one.

Can I use the Hidden Headphones Carrier Board v4 design in my own project?

Yes, under the terms of its CC0-1.0 license, which jrydin01 chose for the repository.

Can I test firmware for the Hidden Headphones Carrier Board v4 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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