HardLabs

PCB Sentinel

lishangqiu·PCB_Sentinel·fixtures-src/Asynchronous-SPDIF-Mixer-patched/KiCad/MIxer_SPDIF_V1.0.kicad_pcb

PCB Sentinel layout, top view — open source STM32 board by lishangqiu

About the PCB Sentinel

PCB Sentinel is an open source STM32 PCB design by lishangqiu, published on GitHub under the MIT license. It is a 2-layer board measuring 100 × 84 mm, with 136 components from 68 distinct parts.

Its main chip is the STM32H743VIT6, from the STM32 family. Other key parts include the 74HC04, MAX3490, W25Q64, DIR9001 and AMS1117-3.3. By type, the board carries 44 capacitors, 38 resistors, 14 test points, 12 jumpers, 7 ICs and 7 connectors.

It belongs with the audio designs in this gallery.

From the project

"Asynchronous SPDIF Mixer" is a hardware and software project designed to synchronize and mix up to three asynchronous S/PDIF streams into a single 48 kHz output stream. The system compensates for drift between sources and uses interpolation to ensure smooth and artifact-free aud

"Asynchronous SPDIF Mixer" is a hardware and software project designed to synchronize and mix up to three asynchronous S/PDIF streams into a single 48 kHz output stream. The system compensates for drift between sources and uses interpolation to ensure smooth and artifact-free audio transitions. The project includes USB-MIDI control, allowing real-time mixing of the three audio channels via an external MIDI controller or any MIDI-compatible software.

Main components on the PCB Sentinel

STM32H743VIT674HC04MAX3490W25Q64DIR9001AMS1117-3.3

PCB Sentinel bill of materials (BOM)

136 components, 68 distinct parts.

QtyPartRefs
1
STM32H743VIT6
U1
1
74HC04
U2
1
MAX3490
U3
1
W25Q64
U4
2
DIR9001
U5, U6
1
AMS1117-3.3
U7
1
25Mhz
Y1
1
Power In
J1
1
Debug
J2
1
USB_C_Receptacle_USB2.0_16P
J3
1
S/PDIF-Out
J4
1
S/PDIF-In1
J5
1
S/PDIF-In2
J6
1
S/PDIF-In3
J7
1
CFG1
JP1
1
CFG2
JP2
1
CFG3
JP3
1
CFG4
JP4
1
PSCK1_1
JP5
1
PSCK0_1
JP6
Show 48 more
QtyPartRefs
1
FMT1_1
JP7
1
FMT0_1
JP8
1
PSCK1_2
JP9
1
PSCK0_2
JP10
1
FMT1_2
JP11
1
FMT0_2
JP12
1
B1205_2W
PS1
1
BOOT
SW1
1
RESET
SW2
4
PE 65612
T1, T2, T3, T4
1
BCLK1
TP1
1
LRCLK1
TP2
1
DOUT1
TP3
1
ERROR1
TP4
1
NO_AUDIO1
TP5
1
Out
TP6
1
In1
TP7
1
BCLK2
TP8
1
LRCLK2
TP9
1
DOUT2
TP10
1
ERROR2
TP11
1
NO_AUDIO2
TP12
1
In2
TP13
1
In3
TP14
1
PRTR5V0U2X
D1
1
3.3V
D2
1
In3
D3
1
In2
D4
1
In1
D5
1
1K 100MHz
FB1
24
100n
C1, C2, C3, C4, C5, C6, C8, C10 +16
2
1u
C7, C9
2
2.2u
C13, C14
4
10u
C16, C19, C20, C23
2
100u
C24, C25
2
15p
C29, C30
2
4.7n
C31, C37
2
68n
C32, C38
2
68n
C41, C44
2
4.7n
C42, C43
3
0
R1, R37, R38
12
10k
R2, R3, R4, R5, R15, R16, R17, R18 +4
2
5.1K
R6, R7
4
47k
R8, R24, R31, R35
6
4.7K
R9, R10, R11, R12, R13, R14
6
75
R19, R20, R21, R23, R30, R34
2
680
R22, R33
3
2.2k
R25, R32, R36

PCB Sentinel design files

The KiCad project lives in the lishangqiu/PCB_Sentinel repository on GitHub; these links point at the commit this page was built from.

PCB Sentinel: common questions

What microcontroller does the PCB Sentinel use?

The PCB Sentinel is built around the STM32H743VIT6, from the STM32 family.

How big is the PCB Sentinel?

The PCB Sentinel measures 100 × 84 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the PCB Sentinel?

136 components, from 68 distinct parts. The full bill of materials is listed on this page.

Where can I download the PCB Sentinel design files?

From the lishangqiu/PCB_Sentinel repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the PCB Sentinel design in my own project?

Yes, under the terms of its MIT license, which lishangqiu chose for the repository.

Can I test firmware for the PCB Sentinel 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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