HardLabs

Slider synth

udu3324·slider-synth·pcb/slider-synth/slider-synth.kicad_pcb

Slider synth PCB layout, top view — open source ESP32 board by udu3324

About the Slider synth PCB

Slider synth is an open source ESP32 PCB design by udu3324, published on GitHub under the GPL-3.0 license. It is a 2-layer board measuring 94.6 × 25 mm, with 49 components from 26 distinct parts.

Its main chip is the ESP32-S3-WROOM-2, from the ESP32 family. Other key parts include the LM3940IMPX-3.3/NOPB, MCP4922-E/SL and LM386. By type, the board carries 16 capacitors, 14 resistors, 5 ICs, 5 diodes, 4 connectors and 3 switches.

It belongs with the audio designs in this gallery.

From the project

A esp32 based synth that uses a touch pot and fsr.

A synth that uses a linear touch sensor with a force sensor underneath to create cool sounds. It is inspired by the modulin by wintergatan. Powered by the esp32-s3 and mozzi library.

I built this pcb to make my diy setup more professional. I originally hooked everything up with an arduino but was really hard to cary around without dropping the breadboard or unplugging something. This design leaves it hot pluggable as well as super professional and more polished.

Slider synth, from the project README
From the project README

Main components on the Slider synth

ESP32-S3-WROOM-2LM3940IMPX-3.3/NOPBMCP4922-E/SLLM386

Slider synth bill of materials (BOM)

49 components, 26 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
ESP32-S3-WROOM-2
U1
1
LM3940IMPX-3.3/NOPB
JLCPCB
U2
1
MCP4922-E/SL
MCP4922
JLCPCB
U32
2
LM386
JLCPCB
U33, U34
1
USB4105-GF-A-120
USB4105
JLCPCB
J1
1
PJ-325C5-G
J2
2
Conn_01x01_Pin
J3, J4
1
SEN-08681
RV1
1
3362P-100kΩ
RV2
2
SW_SPST
SW1, SW2
1
RotaryEncoder_Switch
SW3
1
SS14
JLCPCB
D1
4
LED
D3, D4, D5, D6
1
CL21B105KBFNNNE
1uF
JLCPCB
C1
1
CL21B474KBFNNNE
0.47μF
JLCPCB
C2
3
CL21A476MQYNNNE
47μF
JLCPCB
C3, C43, C45
1
CL21A106KAYNNNE
10μF
JLCPCB
C4
6
CC0805KRX7R9BB104
0.1μF
JLCPCB
C5, C6, C7, C48, C49, C50
2
0805B333K500NT
33nF
JLCPCB
C42, C44
2
CL21B473KBCNNNC
47nF
JLCPCB
C46, C47
Show 6 more
QtyPartRefs
2
0805W8F5101T5E
5.1kΩ
JLCPCB
R1, R2
2
0805W8F1002T5E
10kΩ
JLCPCB
R3, R13
3
0805W8F0000T5E
0Ω
JLCPCB
R4, R5, R6
4
0805W8F3300T5E
330Ω
JLCPCB
R8, R9, R10, R11
1
Force Sensitive Resistor 500mm
R12
2
0805W8F100JT5E
10Ω
JLCPCB
R28, R29

Slider synth design files

The KiCad project lives in the udu3324/slider-synth repository on GitHub; these links point at the commit this page was built from.

Slider synth: common questions

What microcontroller does the Slider synth use?

The Slider synth is built around the ESP32-S3-WROOM-2, from the ESP32 family.

How big is the Slider synth PCB?

The Slider synth measures 94.6 × 25 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Slider synth?

49 components, from 26 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 Slider synth design files?

From the udu3324/slider-synth 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 Slider synth design in my own project?

Yes, under the terms of its GPL-3.0 license, which udu3324 chose for the repository.

Can I test firmware for the Slider synth 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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