HardLabs

Custom-ESP32

shyver·custom-ESP32·kicad/ESP32_kicad_project.kicad_pcb

Custom-ESP32 PCB layout, top view — open source ESP32 board by shyver

About the Custom-ESP32 PCB

Custom-ESP32 is an open source ESP32 PCB design by shyver, published on GitHub under the MIT license. It is a 2-layer board measuring 30 × 60 mm, with 56 components from 30 distinct parts.

Its main chip is the ESP32-WROOM-32E, from the ESP32 family. Other key parts include the TPS56339DDC and CP2102N-AXX-XQFN24. By type, the board carries 24 resistors, 12 capacitors, 5 diodes, 3 ICs, 3 transistors and 2 connectors.

It belongs with the power & battery, dev boards & breakouts and iot & wireless designs in this gallery.

From the project

Buck regulator instead of LDO** A switching buck regulator was selected to efficiently step down USB 5 V to 3.3 V while supporting the ESP32’s peak current demands. This avoids thermal limitations and voltage droop that would occur with a linear regulator.

Buck regulator instead of LDO** A switching buck regulator was selected to efficiently step down USB 5 V to 3.3 V while supporting the ESP32’s peak current demands. This avoids thermal limitations and voltage droop that would occur with a linear regulator.

Use of an ESP32 module rather than bare IC** The ESP32-WROOM module was chosen to simplify RF design, eliminate impedance-controlled antenna routing complexity, and reduce bring-up risk while maintaining full ESP32 functionality.

Main components on the Custom-ESP32

TPS56339DDCESP32-WROOM-32ECP2102N-AXX-XQFN24

Custom-ESP32 bill of materials (BOM)

56 components, 30 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
TPS56339DDC
U1
1
ESP32-WROOM-32E
U2
1
CP2102N-AXX-XQFN24
CP2102N-Axx-xQFN24
U3
1
AO3401A
Q1
2
SS8050
Q2, Q3
1
CONN_01X04_PIN
Conn_01x04_Pin
J1
1
USB_C_RECEPTACLE_USB2.0_16P
USB_C_Receptacle_USB2.0_16P
J2
1
10µF
Cin1
1
Polyfuse
F1
2
Conn_01x19_Pin
LEFT_GPIO1, RIGHT_GPIO1
2
SW_Push
SW1, SW2
1
5.0V TVS
D1
2
LED
D2, D3
2
5.0V TVS
D4, D5
1
SRP5030CA-4R7M
L1
7
0.1µF
C1, C3, C4, C8, C9, C10, C12
2
10µF
C2, C5
2
22µF
C6, C7
1
4.7µ
C11
1
30.0
R1
Show 10 more
QtyPartRefs
2
5.1K
5.1k
R2, R3
1
30.9K
30.9k
R4
1
10.0K
10.0k
R5
8
10K
10k
R6, R7, R8, R9, R10, R11, R14, R15
2
47
R12, R13
3
1k
R16, R17, R20
1
22.1K
R18
1
47.5K
R19
2
22
R21, R22
2
100K
100k
R23, R24

Custom-ESP32 design files

The KiCad project lives in the shyver/custom-ESP32 repository on GitHub; these links point at the commit this page was built from.

Custom-ESP32: common questions

What microcontroller does the Custom-ESP32 use?

The Custom-ESP32 is built around the ESP32-WROOM-32E, from the ESP32 family.

How big is the Custom-ESP32 PCB?

The Custom-ESP32 measures 30 × 60 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Custom-ESP32?

56 components, from 30 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 Custom-ESP32 design files?

From the shyver/custom-ESP32 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 Custom-ESP32 design in my own project?

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

Can I test firmware for the Custom-ESP32 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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