HardLabs

Pixel snap voice

zeeman-effect·pixel-snap-voice·hardware/kicad/recorder/recorder.kicad_pcb

Pixel snap voice PCB layout, top view — open source ESP32 board by zeeman-effect

About the Pixel snap voice PCB

Pixel snap voice is an open source ESP32 PCB design by zeeman-effect, published on GitHub. It is a 4-layer board measuring 64 × 86 mm, with 55 components from 32 distinct parts.

Its main chip is the ESP32-S3-MINI-1U-N8, from the ESP32 family. Other key parts include the ES8311, BQ24074RGTR, AP2112K-3.3, AP22804AW5 and NS4150B. By type, the board carries 21 capacitors, 11 resistors, 8 ICs, 2 connectors, 2 diodes and 1 crystal.

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

From the project

A simple audio recording device that magnetically attaches to the back of a Pixel device

4-layer 0.8 mm, ENIG. Origin = magnet-ring center (same as CAD). USB is full speed and deliberately not impedance controlled — see Stackup.

- Product: recorder/ — schematic + PCB. Open recorder.kicadpro. - Learning: exampleproject/ — hand-made KiCad 10 sandbox. Not product truth. Leave it alone unless you are in that lesson.

routepcb.py and generatepcb.py need an interpreter that can import pcbnew. On Linux that is the system python3; on Windows use %LOCALAPPDATA%\Programs\KiCad\10.0\bin\python.exe.

Main components on the Pixel snap voice

ESP32-S3-MINI-1U-N8ES8311BQ24074RGTRAP2112K-3.3AP22804AW5NS4150BUSBLC6-2SC6LP5907MFX-2.8

Pixel snap voice bill of materials (BOM)

55 components, 32 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
ESP32-S3-MINI-1U-N8
U1
1
ES8311
U2
1
BQ24074RGTR
U3
1
AP2112K-3.3
U4
1
AP22804AW5
U5
1
NS4150B
U6
1
USBLC6-2SC6
U7
1
LP5907MFX-2.8
U8
1
12.288MHZ
12.288MHz
Y1
1
USB_C_16P
J2
1
C91145
microSD
J3
1
C173752
JST-PH 1S
BT1
1
C883095
500mA PTC
F1
1
IM73A135
MK1
5
10K
10k
Rsd0, Rsd1, Rsd2, Rsd3, Rsd4
1
KLJ-01304T-08R07W
SP1
1
C388883
record
SW1
1
C2286
status
D1
1
C2286
chg
D2
1
22UF
22uF
C1
Show 12 more
QtyPartRefs
12
1UF
1uF
C2, C6, C9, C10, C11, C12, C13, C15 +4
2
100NF
100nF
C3, C14
2
4.7UF
4.7uF
C4, C5
1
2.2UF
2.2uF
C7
2
10UF
10uF
C8, C20
1
10UF
10uF
C21
3
10K
10k
R1, R7, R10
2
5.11K
5.11k
R2, R3
1
1.8K
1.8k
R4
2
4.7K
4.7k
R5, R6
2
3.01K
3.01k
R8, R11
1
49.9K
49.9k
R9

Pixel snap voice design files

The KiCad project lives in the zeeman-effect/pixel-snap-voice repository on GitHub; these links point at the commit this page was built from.

Pixel snap voice: common questions

What microcontroller does the Pixel snap voice use?

The Pixel snap voice is built around the ESP32-S3-MINI-1U-N8, from the ESP32 family.

How big is the Pixel snap voice PCB?

The Pixel snap voice measures 64 × 86 mm, has 4 copper layers and is 0.8 mm thick.

How many components are on the Pixel snap voice?

55 components, from 32 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 Pixel snap voice design files?

From the zeeman-effect/pixel-snap-voice 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 Pixel snap voice design in my own project?

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

Can I test firmware for the Pixel snap voice 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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