HardLabs

BSPD

sufst·pcb·bspd/BSPD.kicad_pcb

BSPD PCB layout, top view — open source ESP32 board by sufst
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About the BSPD PCB

BSPD is an open source ESP32 PCB design by sufst, published on GitHub under the GPL-3.0 license. It is a 4-layer board measuring 60 × 47.5 mm, with 67 components from 51 distinct parts.

Its main chip is the ESP32-S3-WROOM-1, from the ESP32 family. Other key parts include the AP2112K-3.3, CH340C, XL1509-5.0 and LTC-4627JR. By type, the board carries 32 resistors, 12 capacitors, 7 diodes, 5 ICs, 2 transistors and 2 connectors.

From the project

Monorepo for all schematics and PCB designs

We design our PCBs in KiCad (version 8+).

Files that should be in this repo, under version control: - Project files (.kicadpro). - Schematic files (.kicadsch). - PCB files (.kicadpcb). - Custom footprints (.kicadmod). - Custom symbols (.kicadsym). - Footprint library tables (fp-lib-table). - Symbol library tables (sym-lib-table). - 3D models of components (.step files). - Simulation code (e.g. .asc` files from LTSpice).

Main components on the BSPD

AP2112K-3.3CH340CXL1509-5.0ESP32-S3-WROOM-1LTC-4627JR

BSPD bill of materials (BOM)

67 components, 51 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
AP2112K-3.3
4013
U1
1
CH340C
LM339
U2
1
XL1509-5.0
40106
U3
1
ESP32-S3-WROOM-1
LM339
U4
1
LTC-4627JR
TLV9104IRUCR
U5
1
XP262N7002TR-G
Q1
1
BC856
Q2
1
USB_C_RECEPTACLE_USB2.0_16P
BPS SUPPLY
J1
1
CONN_01X04
Main I/O
J2
2
BZT52-C9V1
DZ1, DZ2
1
G5Q-1EU DC12
K1
1
300K
1k
RV1
1
10k
RV2
1
100k
RV3
1
250k
RV4
2
Green
D1, D2
2
ESD9B3.3ST5G
BAT54W
D3, D4
1
BAT54W
Green
D5
1
ESD9B3.3ST5G
SS14
D6
1
SS14
D7
Show 31 more
QtyPartRefs
2
1UF
100n
C1, C4
1
10NF
100n
C2
2
10UF
100n
C3, C8
1
470UF
100n
C5
1
100NF
100u
C6
1
100UF
100n
C7
1
100NF
1u
C9
1
10UF
10u
C10
1
180UF
10u
C11
1
100u
C12
1
10k
R1
1
1k
R2
1
10K
1k
R4
1
5.1K
1k
R6
1
5.1K
100k
R7
2
51K
1k
R10, R12
2
51K
10k
R11, R15
2
51K
100k
R13, R17
1
51K
470
R14
2
51K
8.2k
R16, R20
1
51K
1.5k
R18
1
51K
2.7k
R19
1
51K
200
R21
1
10K
2.2k
R22
5
10K
10k
R23, R28, R29, R30, R31
1
10K
47k
R24
1
10K
82k
R25
3
10K
0
R26, R27, R32
2
10K
100
R33, R34
1
10K
33k
R35
1
10K
100k
R36

BSPD design files

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

BSPD: common questions

What microcontroller does the BSPD use?

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

How big is the BSPD PCB?

The BSPD measures 60 × 47.5 mm, has 4 copper layers and is 1.6 mm thick.

How many components are on the BSPD?

67 components, from 51 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 BSPD design files?

From the sufst/pcb 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 BSPD design in my own project?

Yes, under the terms of its GPL-3.0 license, which sufst chose for the repository.

Can I test firmware for the BSPD 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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