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ESP BMCU

mengxyz·ESP_BMCU·HW/MB/BMCU_MB_SHARED/BMCU_MB_SHARED.kicad_pcb

ESP BMCU PCB layout, top view — open source ESP32 board by mengxyz

About the ESP BMCU PCB

ESP BMCU is an open source ESP32 PCB design by mengxyz, published on GitHub under the GPL-3.0 license. It is a 2-layer board measuring 31.2 × 99.6 mm, with 74 components from 32 distinct parts.

Its main chip is the ESP32-S3-MINI-1U-N8, from the ESP32 family. Other key parts include the KH-TYPE-C-L6.5-16P-STM, DRV8231DDAR, TP75176E-SR, AHT20-F and LMR33630ADDA. By type, the board carries 25 resistors, 21 capacitors, 11 ICs, 6 connectors, 5 diodes and 2 switches.

ESP BMCU, from the project README
From the project README

Main components on the ESP BMCU

ESP32-S3-MINI-1U-N8KH-TYPE-C-L6.5-16P-STMDRV8231DDARTP75176E-SRAHT20-FLMR33630ADDASHT4X

ESP BMCU bill of materials (BOM)

74 components, 32 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
ESP32-S3-MINI-1U-N8
U1
1
KH-TYPE-C-L6.5-16P-STM
U2
4
DRV8231DDAR
U3, U4, U5, U6
2
TP75176E-SR
U7, U10
1
AHT20-F
U8
1
LMR33630ADDA
TI(德州仪器)
U9
1
SHT4X
SHT4x
U11
1
C3294384
HC-MX3.0-2*3AW
CN1
4
C5340818
2.0-10P WT
CN2, CN3, CN4, CN5
1
CONN_01X04
Conn_01x04
J1
1
2A
F1
2
GT-TC194A-H0055-L1
G-Switch(品赞)
SW1, SW2
2
XL-4020RGBC-WS2812B
LED1, LED3
2
PSM712-LF-T7
D1, D5
1
SMAJ24CA-C148223
D2
1
1N4148WS
D3
1
C51450
PESD3V3L1BA,115
D4
1
33UH
33uH
L1
12
0.1UF
0.1uF
C1, C2, C3, C4, C5, C6, C7, C8 +4
2
100UF
100uF
C9, C10
Show 12 more
QtyPartRefs
4
0.1UF
0.1uF
C11, C12, C18, C22
1
47PF
47pF
C16
1
10UF
10uF
C17
1
200NF
200nF
C19
6
10R
R1, R2, R7, R8, R9, R10
2
5.1K
R3, R4
3
10K
R5, R18, R19
3
120R
R6, R20, R23
4
0.10R
R11, R12, R13, R14
2
100K
R15, R17
1
43.2K
R16
4
4D03WGJ0103T5E
RN1, RN2, RN3, RN4

ESP BMCU design files

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

ESP BMCU: common questions

What microcontroller does the ESP BMCU use?

The ESP BMCU is built around the ESP32-S3-MINI-1U-N8, from the ESP32 family.

How big is the ESP BMCU PCB?

The ESP BMCU measures 31.2 × 99.6 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the ESP BMCU?

74 components, from 32 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 ESP BMCU design files?

From the mengxyz/ESP_BMCU 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 ESP BMCU design in my own project?

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

Can I test firmware for the ESP BMCU 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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