HardLabs

EUB-04 Emiuet

emnyeca·emiuet·hardware/kicad/Emiuet.kicad_pcb

EUB-04 Emiuet PCB layout, top view — open source ESP32 board by emnyeca

About the EUB-04 Emiuet PCB

EUB-04 Emiuet is an open source ESP32 PCB design by emnyeca, published on GitHub. It is a 2-layer board measuring 297 × 102.4 mm, with 251 components from 54 distinct parts.

Its main chip is the ESP32-S3-MINI-1, from the ESP32 family. Other key parts include the TPD2EUSB30ADRTR, LM66100DCK, AP7333-33SAG-7, TUSB320LAIRWBR and TPS61023DRLR. By type, the board carries 86 switches, 80 diodes, 31 capacitors, 30 resistors, 7 ICs and 4 connectors.

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

From the project

Fretboard-style MIDI Controller for Guitarists

Fretboard-style MIDI Controller for Guitarists

Emiuet is a fretboard-shaped MIDI controller designed specifically for guitarists.

Instead of adapting piano-style abstractions, Emiuet is built around strings, positions, voicings, and controlled expressive gestures. It is part of Emnyeca’s Utility Build Series (EUB) and represents a focused, intentionally constrained musical instrument.

EUB-04 Emiuet, from the project README
From the project README

Main components on the EUB-04 Emiuet

ESP32-S3-MINI-1TPD2EUSB30ADRTRLM66100DCKAP7333-33SAG-7TUSB320LAIRWBRTPS61023DRLRBQ24074RGT

EUB-04 Emiuet bill of materials (BOM)

251 components, 54 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
ESP32-S3-MINI-1
U1
1
TPD2EUSB30ADRTR
U2
1
LM66100DCK
U3
1
AP7333-33SAG-7
U4
1
TUSB320LAIRWBR
U5
1
TPS61023DRLR
U6
1
BQ24074RGT
U7
1
S9013 J3
Q1
2
USB_C_RECEPTACLE_USB2.0_16P
USB_C_Receptacle_USB2.0_16P
J1, J2
1
AUDIOJACK3
AudioJack3
J3
1
CONN_01X02_PIN
Conn_01x02_Pin
J4
1
800MAH
800mAh
BT1
1
waveshare0.96inch
Brd2
2
MF-MSMF110-2
F1, F2
3
10K
10k
RV1, RV2, RV3
1
SW_Slide_DPDT
SW1
78
Switch_SW_Push
SW1_0, SW1_1, SW1_2, SW1_3, SW1_4, SW1_5, SW1_6, SW1_7 +70
1
SW_SPST
SW2
2
SW_SPST
SW3, SW4
2
SW_SPST
SW5, SW6
Show 34 more
QtyPartRefs
2
SW_SPDT
SW7, SW8
1
Thermistor
TH1
1
SMF5V0A
D1
78
1N4148
D1_0, D1_1, D1_2, D1_3, D1_4, D1_5, D1_6, D1_7 +70
1
LED B
D3
2
FerriteBead_Small
FB1, FB2
1
DLW21SN900SQ2L
L1
1
4.7μ
L2
3
1μ
C1, C12, C31
1
10μ
C2
10
22μ
C3, C4, C6, C7, C14, C21, C23, C24 +2
15
100N
100n
C5, C8, C9, C11, C13, C15, C16, C17 +7
1
33P
33p
C10
1
Byp or Bulk xμ_10μ
C26
4
10K
10k
R1, R10, R25, R26
2
5.1K
5.1k
R2, R3
2
220
R4, R9
1
1k
R5
1
10k
R6
2
470
R7, R8
1
900K
900k
R11
3
4.7K
4.7k
R12, R17, R18
1
887K
887k
R13
1
120K
120k
R14
1
200K
200k
R15
1
200K
200k
R16
3
100
R19, R20, R21
1
1.18K
1.18k
R22
1
4.12K
4.12k
R23
1
1.13K
1.13k
R24
1
560K
560k
R27
1
1k
R28
1
220K
220k
R29
1
100k
R30

EUB-04 Emiuet design files

The KiCad project lives in the emnyeca/emiuet repository on GitHub; these links point at the commit this page was built from.

EUB-04 Emiuet: common questions

What microcontroller does the EUB-04 Emiuet use?

The EUB-04 Emiuet is built around the ESP32-S3-MINI-1, from the ESP32 family.

How big is the EUB-04 Emiuet PCB?

The EUB-04 Emiuet measures 297 × 102.4 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the EUB-04 Emiuet?

251 components, from 54 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 EUB-04 Emiuet design files?

From the emnyeca/emiuet 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 EUB-04 Emiuet design in my own project?

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

Can I test firmware for the EUB-04 Emiuet 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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