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SG-SGMB

WAAAJIAN·SG-SGMB

SG-SGMB PCB layout, top view — open source ESP32 board by WAAAJIAN

About the SG-SGMB PCB

SG-SGMB is an open source ESP32 PCB design by WAAAJIAN, published on GitHub. It is a 2-layer board measuring 56 × 85 mm, with 64 components from 35 distinct parts.

Its main chip is the ESP32-S3-WROOM-1, from the ESP32 family. Other key parts include the SGM2212_3.3 and TPS56836. By type, the board carries 22 capacitors, 19 resistors, 7 connectors, 4 ICs, 4 diodes and 3 transistors.

It belongs with the robotics & motion, iot & wireless and power & battery designs in this gallery.

From the project

The SG-SGMB (SpiderGwen MotherBoard) is the embedded controller board at the heart of the SpiderGwen hexapod. It handles all real-time motor control and sensor interfacing, offloading these low-latency tasks from the Raspberry Pi brain. It physically stacks onto the Raspberry Pi

The SG-SGMB (SpiderGwen MotherBoard) is the embedded controller board at the heart of the SpiderGwen hexapod. It handles all real-time motor control and sensor interfacing, offloading these low-latency tasks from the Raspberry Pi brain. It physically stacks onto the Raspberry Pi via the 40-pin GPIO header and communicates over SPI0.

Power is supplied externally by the SG-SGPB (SpiderGwen Power Board), which converts the 2S LiPo battery voltage into the servo and logic rails used by this board.

Main components on the SG-SGMB

ESP32-S3-WROOM-1SGM2212_3.3TPS56836

SG-SGMB bill of materials (BOM)

64 components, 35 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
ESP32-S3-WROOM-1
U1
1
SGM2212_3.3
MPU-6050
U2
1
TPS56836
SGM2212_3.3
U3
1
TPS56836
CP2102N-Axx-xQFN28
U4
1
AO3401A
LRC L8050QLT1G
Q1
1
LRC L8050QLT1G
Q2
1
AO3401A
Q3
1
Conn_02x04_Top_Bottom
J4
1
Conn_02x02_Top_Bottom
J5
3
HCTL HC-5264-3A
J6, J7, J9
1
Conn_01x06_Pin
J12
1
USB_C_Receptacle_USB2.0_16P
J13
1
J1
RPi4_ModelB_Stacking_Header_2x20_Pitch_2.54mm1
1
Logic
SN74LVC2G1
1
LED
D1
3
LESD5D5.0CT1G
D2, D3, D4
2
4.7UH
HCTL HC-5264-3A
L3, L5
1
HCTL HC-5264-3A
L6
1
1UF/25V
1uF/25V
C1
2
10UF/25V
10uF/25V
C2, C16
Show 15 more
QtyPartRefs
7
0.1UF/25V
0.1uF/25V
C3, C6, C7, C8, C9, C11, C15
5
10UF/25V
0.1uF/25V
C4, C12, C17, C18, C20
1
470UF/25V
0.1uF/25V
C5
1
0.1UF/25V
10nF/25V
C10
1
0.1UF/25V
2.2nF/25V
C13
3
0.1UF/25V
10uF/25V
C14, C21, C22
1
10UF/25V
1uF/25V
C19
4
10kΩ
R1, R6, R7, R14
6
0Ω
R2, R8, R9, R13, R15, R19
2
4.7kΩ
R3, R4
3
5.1kΩ
R5, R17, R18
1
22.1kΩ
R10
1
47.5kΩ
R11
1
1kΩ
R12
1
100kΩ
R16

SG-SGMB design files

The KiCad project lives in the WAAAJIAN/SG-SGMB repository on GitHub; these links point at the commit this page was built from.

SG-SGMB: common questions

What microcontroller does the SG-SGMB use?

The SG-SGMB is built around the ESP32-S3-WROOM-1, from the ESP32 family.

How big is the SG-SGMB PCB?

The SG-SGMB measures 56 × 85 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the SG-SGMB?

64 components, from 35 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 SG-SGMB design files?

From the WAAAJIAN/SG-SGMB 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 SG-SGMB design in my own project?

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

Can I test firmware for the SG-SGMB 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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