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Headphones prototype

strangeparts·niubi-headphones·prototype_pcb/headphones_prototype_pcb.kicad_pcb

Headphones prototype PCB layout, top view — open source board by strangeparts

About the Headphones prototype PCB

Headphones prototype is an open source PCB design by strangeparts, published on GitHub under the MIT license. It is a 2-layer board measuring 60.5 × 76.8 mm, with 52 components from 15 distinct parts.

Other key parts include the SN74LVC1G123, ADG774A and NC7S32. By type, the board carries 34 jumpers, 9 connectors, 4 ICs, 3 resistors and 2 capacitors.

It belongs with the audio designs in this gallery.

From the project

Flexible circuit board design for adding a headphone jack to an iPhone 7

The design of this project is free for everyone. You have my full permission to make modification and improvement however you like.

Here is a picture of the board on the bottom flex cable.

I have used the internal circuit board from an official Apple headphone adapter. The circuit connects this board to the lightning jack on the bottom flex connector. When something is plugged into the lightning jack, the signal is switched from the headphone adapter to the lightning jack. There is a 1 megaohm resistor that pulls the shield of the lightning connector to 3v. This is shorted to ground when a…

Main components on the Headphones prototype

SN74LVC1G123ADG774ANC7S32

Headphones prototype bill of materials (BOM)

52 components, 15 distinct parts.

QtyPartRefs
2
SN74LVC1G123
U1, U3
1
ADG774A
U2
1
NC7S32
U4
1
LIGHTING_JACK
J1
3
CONN_01X10
J2, J4, J6
1
BOTTOM_FLEX_LIGHTNING
J3
1
IPHONE_HEADPHONE_JACK
J7
1
CONN_01X02
J8
1
LIGHTNING_HEADPHONE_ADAPTER
J9
1
CONN_01X05
J10
7
Jumper_NO_Small
JP1, JP2, JP3, JP28, JP29, JP30, JP31
27
Jumper_NC_Small
JP4, JP5, JP6, JP7, JP8, JP9, JP10, JP11 +19
2
1uF
C1, C2
2
100K
R1, R3
1
1M
R2

Headphones prototype design files

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

Headphones prototype: common questions

How big is the Headphones prototype PCB?

The Headphones prototype measures 60.5 × 76.8 mm, has 2 copper layers and is 0.6 mm thick.

How many components are on the Headphones prototype?

52 components, from 15 distinct parts. The full bill of materials is listed on this page.

Where can I download the Headphones prototype design files?

From the strangeparts/niubi-headphones repository on GitHub, which has the KiCad layout; the links under Design files point to each one.

Can I use the Headphones prototype design in my own project?

Yes, under the terms of its MIT license, which strangeparts chose for the repository.

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