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Smu main

PaulBichl·vibepcb-smu·boards/smu-main/hardware/kicad/smu-main.kicad_pcb

Smu main PCB layout, top view — open source STM32 board by PaulBichl

About the Smu main PCB

Smu main is an open source STM32 PCB design by PaulBichl, published on GitHub. It is a 4-layer board measuring 160 × 100 mm, with 240 components from 86 distinct parts.

Its main chip is the STM32G431RBT6, from the STM32 family. Other key parts include the STUSB4500QTR, USBLC6-2SC6, LMR51635YDDCR, AP2112K-3.3TRG1 and ME6211C33M5G-N. By type, the board carries 103 capacitors, 84 resistors, 17 ICs, 12 diodes, 6 connectors and 6 inductors.

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

From the project

VibePCB example: 4-quadrant SMU (+-30 V / +-1 A, USB-C PD, Ethernet) designed with an LLM

A 1-channel, 4-quadrant source/measure unit (bipolar lab supply that also sinks): +-30 V, +-1 A, powered from a USB-C PD charger (20 V), controlled over Ethernet, voltage and current on two 4-digit 7-segment displays. Designed with VibePCB (tscircuit -> KiCad).

The boards are joined by a 10-way ribbon (main J5 front J1). The output terminal (main J3: HI, S+, S-, LO) is wired to front-panel binding posts; the OPA548 (TO-220-7) bolts to a heatsink on the rear panel (with a fan on J4).

Smu main, from the project README
From the project README

Main components on the Smu main

STUSB4500QTRUSBLC6-2SC6LMR51635YDDCRAP2112K-3.3TRG1ME6211C33M5G-NLM27761DSGRLM5156HPWPRSTM32G431RBT6W5500DAC8563SDGSROPA2192IDRINA828IDRADS131M02IPWROPA548TPC817C

Smu main bill of materials (BOM)

240 components, 86 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
STUSB4500QTR
U1
1
USBLC6-2SC6
U2
2
LMR51635YDDCR
U3, U8
1
AP2112K-3.3TRG1
U4
1
ME6211C33M5G-N
U5
1
LM27761DSGR
U6
1
LM5156HPWPR
U7
1
STM32G431RBT6
U20
1
W5500
U21
1
DAC8563SDGSR
U30
2
OPA2192IDR
U31, U32
1
INA828IDR
U33
1
ADS131M02IPWR
U34
1
OPA548T
U40
1
PC817C
U41
1
AO4407A
Q1
1
BSC160N10NS3G
Q2
1
MMBT5401(RANGE:200-300)
Q3
2
AO3400A
Q43, Q44
1
OT2JI-111-8.192M
X1
Show 66 more
QtyPartRefs
1
NX3225SA-25MHz-STD-CSR-6
Y1
1
X50328MSB2GI
Y2
1
TYPE-C 16PIN 2MD(073)
J1
1
HR911105A
J2
1
DG301-5.0-04P-14-1000A(H)
J3
1
B2B-XH-A-GU
J4
1
A2541WV-2x5P
J5
1
PZ254V-11-05P
J6
1
HFD4/5
K1
1
NCP18XH103F03RB
10kΩ
RT1
2
TS-1187A-B-A-B
SW1, SW2
1
SMBJ24A
D1
3
SS5100
D
D2, D40, D41
1
BZX84C51
D3
6
1N4148W
D
D10, D11, D12, D13, D42, D44
1
SMBJ36CA
D43
2
BLM18PG221SN1D
1µH
FB1, FB2
1
SWPA6045S100MT
10µH
L1
3
SRP1265A-220M
22µH
L2, L3, L4
12
1UF
1uF
C1, C2, C3, C14, C18, C20, C31, C43 +4
34
100NF
100nF
C4, C11, C17, C36, C51, C52, C53, C54 +26
1
4.7NF
4.7nF
C5
3
NXA63V100M8*15 LO
100uF
C6, C28, C42
7
2.2UF
2.2uF
C7, C8, C9, C29, C30, C37, C38
4
100NF
100nF
C10, C39, C101, C103
2
22UF
22uF
C12, C13
7
10UF
10uF
C15, C16, C19, C35, C50, C62, C69
4
4.7UF
4.7uF
C21, C22, C23, C71
8
4.7UF
4.7uF
C24, C25, C26, C27, C40, C41, C100, C102
3
47NF
47nF
C32, C85, C86
2
22NF
22nF
C33, C73
1
470PF
470pF
C34
2
15PF
15pF
C60, C61
3
10NF
10nF
C72, C76, C99
2
6.8NF
6.8nF
C74, C75
1
220NF
220nF
C95
3
1NF
1nF
C97, C98, C105
1
4.7NF
4.7nF
C104
1
1UF
1uF
C108
2
22PF
22pF
C111, C112
4
1kΩ
R1, R17, R24, R97
3
1MΩ
R2, R7, R18
10
100kΩ
R3, R4, R5, R14, R19, R20, R55, R62 +2
3
20kΩ
R6, R81, R85
1
390kΩ
R8
1
15mΩ
R9
31
10kΩ
R10, R13, R16, R23, R50, R51, R54, R56 +23
2
49.9kΩ
R11, R109
1
75kΩ
R12
1
4.3kΩ
R15
1
2.4kΩ
R21
1
9.1kΩ
R22
3
4.7kΩ
R52, R53, R114
1
150kΩ
R57
3
120kΩ
R59, R103, R104
1
12.4kΩ
R70
4
49.9Ω
R71, R72, R74, R75
1
10Ω
R73
2
330Ω
R76, R77
2
12kΩ
R82, R86
1
5.6kΩ
R92
2
300kΩ
R93, R95
1
680Ω
R108
2
100Ω
R115, R116
1
100mΩ
R117
1
HoJLR2512-2W-470mR-1%-75ppm
470mΩ
R118

Smu main design files

The KiCad project lives in the PaulBichl/vibepcb-smu repository on GitHub; these links point at the commit this page was built from.

Smu main: common questions

What microcontroller does the Smu main use?

The Smu main is built around the STM32G431RBT6, from the STM32 family.

How big is the Smu main PCB?

The Smu main measures 160 × 100 mm, has 4 copper layers and is 1.6 mm thick.

How many components are on the Smu main?

240 components, from 86 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 Smu main design files?

From the PaulBichl/vibepcb-smu 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 Smu main design in my own project?

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

Can I test firmware for the Smu main without the hardware?

Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug STM32 firmware against it before you order a PCB.

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