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SDM27 StrainGaugeAmp

sundevilmotorsports·pcb-dev·2027/SDM27_StrainGaugeAmp/SDM27_StrainGaugeAmp.kicad_pcb

SDM27 StrainGaugeAmp PCB layout, top view — open source ESP32 board by sundevilmotorsports
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About the SDM27 StrainGaugeAmp PCB

SDM27 StrainGaugeAmp is an open source ESP32 PCB design by sundevilmotorsports, published on GitHub. It is a 2-layer board measuring 112.2 × 27.4 mm, with 98 components from 60 distinct parts.

Its main chip is the ESP32-C5HR8, from the ESP32 family. Other key parts include the GD25Q32ESIG, TPS2121RUXR, TPS62901RPJR, TCAN3403DRBRQ1 and TLP175A(TPL,E. By type, the board carries 38 resistors, 36 capacitors, 11 ICs, 4 inductors, 3 connectors and 2 switches.

From the project

PCB development repository

Main components on the SDM27 StrainGaugeAmp

ESP32-C5HR8GD25Q32ESIGTPS2121RUXRTPS62901RPJRTCAN3403DRBRQ1TLP175A(TPL,EUSBLC6-2SC6MCP6V91TMCP3561R

SDM27 StrainGaugeAmp bill of materials (BOM)

98 components, 60 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
ESP32-C5HR8
U1
1
GD25Q32ESIG
U2
1
TPS2121RUXR
U3
2
TPS62901RPJR
U4, U10
1
TCAN3403DRBRQ1
U5
1
TLP175A(TPL,E
TLP175A_TPL,E
U6
1
USBLC6-2SC6
U7
2
MCP6V91T
U8, U9
1
MCP3561R
U11
1
CX1612DB48000D0FPJC1
Y3
1
WEIPU SA6 4Pin
J1
1
CONN_01X04_SOCKET
USB_C_Receptacle_USB2.0_16P
J2
1
WEIPU SA6 5Pin
J3
2
SW_Push
SW1, SW2
2
150060RS75000
LED2, LED3
1
ESDCAN03-2BWY
D2
1
24nH
L1
1
2.0nH
L2
2
F1C1-201612-2R2M
L3, L4
2
100NF
1uF
C1, C3
Show 40 more
QtyPartRefs
3
1UF
1uF
C2, C4, C5
1
1UF
100nF
C6
2
4.7UF
100nF
C7, C8
1
100NF
100nF
C9
1
10UF
10uF
C10
2
10uF
C11, C12
1
0.3pF
C13
1
0.8pF
C14
1
2.6pF
C15
1
3pF
C16
2
12pF
C17, C26
11
100nF
C18, C19, C24, C25, C27, C28, C32, C33 +3
1
1uF 10V 0603
C20
2
10uF 25V
C21, C29
2
10nF
C22, C30
2
22uF
C23, C31
2
10K
10k
R1, R2
1
27
R3
1
2.2K
27
R4
1
5.1k
R5
1
2.2K
5.1k
R6
1
22.1K
5k
R7
1
5k
R8
1
47.5K
5k
R9
1
10K
5k
R10
1
63.4k
R11
1
220
23.7k
R12
1
5.05
18.2k
R13
1
10K
10.2k
R14
1
10K
100k
R15
2
113k
R16, R27
2
24.9k
R17, R28
2
330
R18, R29
1
100
R19
1
2k
R20
2
10k
R21, R22
2
350
R24, R25
8
10
R30, R31, R32, R33, R34, R35, R36, R37
2
100k
R38, R39
1
1k
R40

SDM27 StrainGaugeAmp design files

The KiCad project lives in the sundevilmotorsports/pcb-dev repository on GitHub; these links point at the commit this page was built from.

SDM27 StrainGaugeAmp: common questions

What microcontroller does the SDM27 StrainGaugeAmp use?

The SDM27 StrainGaugeAmp is built around the ESP32-C5HR8, from the ESP32 family.

How big is the SDM27 StrainGaugeAmp PCB?

The SDM27 StrainGaugeAmp measures 112.2 × 27.4 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the SDM27 StrainGaugeAmp?

98 components, from 60 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 SDM27 StrainGaugeAmp design files?

From the sundevilmotorsports/pcb-dev 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 SDM27 StrainGaugeAmp design in my own project?

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

Can I test firmware for the SDM27 StrainGaugeAmp 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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