HardLabs

Touchless xm

eldstal·touchless-xm·pcb/tobo/tobo.kicad_pcb

Touchless xm PCB layout, top view — open source AVR/Arduino board by eldstal
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About the Touchless xm PCB

Touchless xm is an open source AVR/Arduino PCB design by eldstal, published on GitHub. It is a 2-layer board measuring 57.5 × 61 mm, with 71 components from 18 distinct parts.

Its main chip is the ATmega328P-AN, from the AVR/Arduino family. Other key parts include the TC7MBL3125CFK(EL), CH340E, MAXM20343AMP+ and 5015. By type, the board carries 23 capacitors, 19 resistors, 15 ICs, 7 diodes, 5 switches and 2 connectors.

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

From the project

Physical buttons for media control on the Sony WH-1000XM2, WH-1000XM3, WH-1000XM4 and possibly WH-1000XM5 wireless headphones

A mod for Sony WH-1000XM2 (experimental), WH-1000XM3, WH-1000XM4 and WH-1000XM5 (experimental) headphones to remove the gesture-based touch controls and add physical buttons.

- Project Status - Compatible headsets - Modifications - How to program your board - Notes on ordering PCBs - License

The buttons have different top surfaces, so you can feel which is which. They've also been relocated to be less likely to be accidentally actuated.

Touchless xm, from the project README
From the project README

Main components on the Touchless xm

TC7MBL3125CFK(EL)ATmega328P-ANCH340EMAXM20343AMP+5015

Touchless xm bill of materials (BOM)

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

QtyPartRefs
2
TC7MBL3125CFK(EL)
~
U1, U2
1
ATmega328P-AN
U3
1
CH340E
U4
1
MAXM20343AMP+
U5
10
5015
U6, U7, U8, U9, U10, U11, U12, U13 +2
1
538-54548-2472
54548-2472
J4
1
TYPE-C-31-M-12
Hroparts Elec TYPE-C-31-M-12
J8
5
SKRTLBE010
S1, S2, S3, S4, S5
7
XL-0201UYC
LED
D1, D2, D3, D4, D5, D6, D7
14
CC0402BRNPO9BN1R5
1.5pF
C1, C2, C3, C4, C5, C6, C7, C8 +6
3
CL05A106MP5NUNC
10uF
C17, C20, C25
4
TMK063ABJ104KP-F
0.1uF
C18, C19, C21, C22
1
CL05A226MQ5QUNC
22uF
C26
1
CL05A225KO5NQNC
2.2uF
C27
9
ERJ-1GJJ102C
1K
R1, R2, R3, R4, R5, R6, R7, R8 +1
7
ERJ-1GNF2700C
270
R9, R10, R11, R12, R13, R14, R15
2
ERA-1AEC512C
5.1K
R16, R17
1
ERJ-6DQF1R0V
1
R27

Touchless xm design files

The KiCad project lives in the eldstal/touchless-xm repository on GitHub; these links point at the commit this page was built from.

Touchless xm: common questions

What microcontroller does the Touchless xm use?

The Touchless xm is built around the ATmega328P-AN, from the AVR/Arduino family.

How big is the Touchless xm PCB?

The Touchless xm measures 57.5 × 61 mm, has 2 copper layers and is 0.6 mm thick.

How many components are on the Touchless xm?

71 components, from 18 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 Touchless xm design files?

From the eldstal/touchless-xm repository on GitHub, which has the KiCad layout, the schematic and the BOM; the links under Design files point to each one.

Can I use the Touchless xm design in my own project?

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

Can I test firmware for the Touchless xm without the hardware?

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

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