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SmallKat-Motherboard

OperationSmallKat·SmallKat-Motherboard

SmallKat-Motherboard PCB layout, top view — open source ESP32 board by OperationSmallKat

About the SmallKat-Motherboard PCB

SmallKat-Motherboard is an open source ESP32 PCB design by OperationSmallKat, published on GitHub. It is a 2-layer board measuring 100 × 56 mm, with 123 components from 46 distinct parts.

Its main chip is the ESP32-S3-MINI-1-N8, from the ESP32 family. Other key parts include the LMR50410YQDBVRQ1 and TPS40192DRCT. By type, the board carries 41 resistors, 26 capacitors, 23 connectors, 13 diodes, 7 fuses and 4 ICs.

Main components on the SmallKat-Motherboard

LMR50410YQDBVRQ1TPS40192DRCTESP32-S3-MINI-1-N8

SmallKat-Motherboard bill of materials (BOM)

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

QtyPartRefs
2
LMR50410YQDBVRQ1
LMR14010A
IC1, IC2
1
TPS40192DRCT
TPS40192DRCT-TPS40192DRCT
IC3
1
ESP32-S3-MINI-1-N8
IC4
2
C3033463
BUK9M17-30EX / BUK7M10-40E
Q2, Q3
1
32.768KHZ
32.768kHz
Y1
1
BATT_SERIAL
J1
20
CONN_01X03_MALE
Conn_01x03_Male
J3, J4, J5, J6, J9, J10, J11, J12 +12
1
C167321
USB_C_Receptacle
J8
1
CONN_01X02_FEMALE
Conn_01x02_Female
J25
1
BNO085
AC1
5
C108518
Fuse
F1, F2, F3, F4, F5
2
C136343
Fuse
F6, F7
2
C410373
SW_SPST
SW1, SW2
9
LED
D1, D2, D3, D6, D9, D10, D11, D12 +1
2
C5199128
DIODE
D4, D5
2
C1974929
D_TVS
D7, D8
2
10UH
10uH
L1, L2
1
1UH
1uH
L3
2
2.2UF
2.2uF
C2, C5
6
0.1UF
0.1uF
C3, C12, C14, C18, C22, C23
Show 26 more
QtyPartRefs
2
10UF
10uF
C4, C6
2
10PF
10pF
C15, C16
1
22UF
22uF
C17
1
1000PF
1000pF
C24
1
100PF
100pF
C25
1
10NF
10nF
C26
2
1UF
1uF
C27, C36
1
4.7UF
4.7uF
C28
1
470NF
470nF
C29
2
10UF
10uF
C30, C32
2
47UF
47uF
C31, C34
2
100UF
100uF
C33, C35
2
330R
R1, R16
14
10K
R2, R4, R7, R10, R13, R15, R17, R19 +6
1
2.4K
R3
6
8.2K
R5, R8, R25, R28, R31, R34
1
120K
R6
6
20K
R9, R26, R29, R32, R35, R37
2
33.2
R11, R12
2
5.1K
R14, R18
1
2.18K
2.18k
R36
1
2.61K
2.61k
R38
1
4.22K
4.22k
R39
1
12K
12k
R40
2
100K
100k
R41, R42
1
1K
R43

SmallKat-Motherboard design files

The KiCad project lives in the OperationSmallKat/SmallKat-Motherboard repository on GitHub; these links point at the commit this page was built from.

SmallKat-Motherboard: common questions

What microcontroller does the SmallKat-Motherboard use?

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

How big is the SmallKat-Motherboard PCB?

The SmallKat-Motherboard measures 100 × 56 mm, has 2 copper layers and is 0.57 mm thick.

How many components are on the SmallKat-Motherboard?

123 components, from 46 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 SmallKat-Motherboard design files?

From the OperationSmallKat/SmallKat-Motherboard 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 SmallKat-Motherboard design in my own project?

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

Can I test firmware for the SmallKat-Motherboard 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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