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StackFlex ESP32 S3

M41T3·stackflex·pcb/stackflex_core/stackflex_core.kicad_pcb

StackFlex ESP32 S3 PCB layout, top view — open source ESP32 board by M41T3

About the StackFlex ESP32 S3 PCB

StackFlex ESP32 S3 is an open source ESP32 PCB design by M41T3, published on GitHub. It is a 2-layer board measuring 40 × 40 mm, with 40 components from 25 distinct parts.

Its main chip is the ESP32-S3-MINI-1-N8, from the ESP32 family. Other key parts include the AP2112K-3.3TRG1, INA226AIDGSR, MAX17048G+T10 and TP4054. By type, the board carries 16 resistors, 11 capacitors, 5 ICs, 4 diodes, 2 switches and 1 transistor.

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

From the project

- JST-PH 2mm Connector Footprint for LiPo (check polarity)

- JST-PH 2mm Connector Footprint for LiPo (check polarity)

ICs: - ESP32-S3 Mini - INA226 Current Sensor - TP4054 Battery Charger - MAX17048 Battery Fuel Gauge

StackFlex ESP32 S3, from the project README
From the project README

Main components on the StackFlex ESP32 S3

ESP32-S3-MINI-1-N8AP2112K-3.3TRG1INA226AIDGSRMAX17048G+T10TP4054

StackFlex ESP32 S3 bill of materials (BOM)

40 components, 25 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
ESP32-S3-MINI-1-N8
IC1
1
AP2112K-3.3TRG1
IC2
1
INA226AIDGSR
IC3
1
MAX17048G+T10
IC4
1
TP4054
IC5
1
DMP2045U-7
Q1
1
USB_C_RECEPTACLE_USB2.0_16P
USB_C_Receptacle_USB2.0_16P
J1
2
PTS820J25MSMTRLFS
S1, S2
1
C71911
green
D1
1
C74338
red
D2
1
1N5819HW-7-F
D3
1
C71911
red
D4
2
10UF
10uF
C1, C11
2
1UF
1uF
C2, C10
6
0.1UF
0.1uF
C3, C5, C6, C7, C8, C9
1
22UF
22uF
C4
1
1k
R1
1
2k
R2
1
10K
10k
R5
2
C25905
5.1k 1%
R6, R7
Show 5 more
QtyPartRefs
1
C247604
33 mOhm 1% 250mW
R8
1
100K
100k
R9
6
4.7K
4.7k
R10, R11, R12, R13, R17, R18
2
330
R14, R16
1
33
R15

StackFlex ESP32 S3 design files

The KiCad project lives in the M41T3/stackflex repository on GitHub; these links point at the commit this page was built from.

StackFlex ESP32 S3: common questions

What microcontroller does the StackFlex ESP32 S3 use?

The StackFlex ESP32 S3 is built around the ESP32-S3-MINI-1-N8, from the ESP32 family.

How big is the StackFlex ESP32 S3 PCB?

The StackFlex ESP32 S3 measures 40 × 40 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the StackFlex ESP32 S3?

40 components, from 25 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 StackFlex ESP32 S3 design files?

From the M41T3/stackflex 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 StackFlex ESP32 S3 design in my own project?

The repository has no license, so all rights stay with M41T3. Use it as a reference, and ask the author before reusing the design.

Can I test firmware for the StackFlex ESP32 S3 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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