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24pin module

nathanfraske·CEC-Platform·modules/atx-24pin-rev2/24pin-module.kicad_pcb

24pin module layout, top view — open source ESP32 board by nathanfraske

About the 24pin module

24pin module is an open source ESP32 PCB design by nathanfraske, published on GitHub under the Apache-2.0 license. It is a 4-layer board measuring 82.9 × 79 mm, with 46 components from 24 distinct parts.

Its main chip is the ESP32-S3-MINI-1-N4R2, from the ESP32 family. Other key parts include the TJA1462AT/0Z, LP5907MFX-3.3/NOPB, SN74LVC1G17DBVR and INA228AIDGSR. By type, the board carries 15 capacitors, 9 ICs, 9 resistors, 5 connectors, 2 switches and 2 diodes.

From the project

Same circuit as ../atx-24pin (the canonical 24-pin ATX interposer); different PCB layout only — 24-pin input (J3) with the 24-pin output (J4) rotated 90° CCW for a right-angle cable exit.

Same circuit as ../atx-24pin (the canonical 24-pin ATX interposer); different PCB layout only — 24-pin input (J3) with the 24-pin output (J4) rotated 90° CCW for a right-angle cable exit.

rev2 ties J1 pin 1 (RJ-45 VCC) to +5VSB, so the module feeds the Hub on both the dedicated JST 5VSB feed and its RJ-45 VCC pin, in parallel. Because the Hub power mux sits only in the JST leg (JST = mux input, RJ-45 VCC = mux output), a short RJ-45 patch makes the RJ-45 the lower-resistance path — it carries the majority of the bulk current (up to ~1.7 A at 3 A total, over the 1.5 A RJ-45 contact rating)…

Main components on the 24pin module

ESP32-S3-MINI-1-N4R2TJA1462AT/0ZLP5907MFX-3.3/NOPBSN74LVC1G17DBVRINA228AIDGSR

24pin module bill of materials (BOM)

46 components, 24 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
ESP32-S3-MINI-1-N4R2
Espressif Systems
U1
1
TJA1462AT/0Z
TJA1462A
NXP Semiconductors
U2
1
LP5907MFX-3.3/NOPB
LP5907MFX-3.3
Texas Instruments
U3
2
SN74LVC1G17DBVR
74LVC1G17
Texas Instruments
U4, U5
4
INA228AIDGSR
INA228
Texas Instruments
U10, U11, U12, U13
1
54602-908LF
TO-HUB
Amphenol ICC
J1
1
S2B-XH-A(LF)(SN)
TO-HUB-PWR
JST
J2
1
5569-24A1
ATX-24 (PSU)
Molex
J3
1
5569-24A1
ATX-24 (MB)
Molex
J4
1
U262-161N-4BVC11
USB_C_Receptacle_USB2.0_16P
XKB Connectivity
J5
3
CSS2H-2512K-2L00F
R002
Bourns
RS1, RS2, RS5
1
LCSR2512FR025K9L
R025
Resistor Today
RS6
2
EVQPUA02K
SW_Push
Panasonic
SW1, SW2
1
SS34
D_Schottky
MDD
D1
1
KT-0603G
LED
Hubei KENTO Elec
D2
2
CL10B105KB8NNNC
1uF
Samsung
C1, C2
10
CL05B104KO5NNNC
100nF
Samsung
C3, C4, C5, C6, C9, C10, C11, C12 +2
2
CL21B106KOQNNNE
10µF
Samsung
C7, C15
1
CL21B105KBFNNNE
1µF
Samsung
C8
1
0402WGF2201TCE
R_ID (OQ-6)
UNI-ROYAL
R1
Show 4 more
QtyPartRefs
1
0402WGF1002TCE
10kΩ
UNI-ROYAL
R2
2
0402WGF2201TCE
2.2kΩ
UNI-ROYAL
R3, R4
2
0402WGF5101TCE
5.1kΩ
UNI-ROYAL
R5, R6
3
0402WGF1001TCE
1kΩ
UNI-ROYAL
R7, R9, R10

24pin module design files

The KiCad project lives in the nathanfraske/CEC-Platform repository on GitHub; these links point at the commit this page was built from.

24pin module: common questions

What microcontroller does the 24pin module use?

The 24pin module is built around the ESP32-S3-MINI-1-N4R2, from the ESP32 family.

How big is the 24pin module?

The 24pin module measures 82.9 × 79 mm, has 4 copper layers and is 1.6 mm thick.

How many components are on the 24pin module?

46 components, from 24 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 24pin module design files?

From the nathanfraske/CEC-Platform 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 24pin module design in my own project?

Yes, under the terms of its Apache-2.0 license, which nathanfraske chose for the repository.

Can I test firmware for the 24pin module 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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