HardLabs

Biro 1

PROJECT-BIRO·Biro-1·board/rev-0/biro-1-rev-0.kicad_pcb

Biro 1 PCB layout, top view — open source ESP32 board by PROJECT-BIRO

About the Biro 1 PCB

Biro 1 is an open source ESP32 PCB design by PROJECT-BIRO, published on GitHub under the MIT license. It is a 4-layer board measuring 158.5 × 81.5 mm, with 129 components from 40 distinct parts.

Its main chip is the ESP32-S3-WROOM-1, from the ESP32 family. Other key parts include the SN74LV1T34DBV, APDS-9306-065, MT6701CT, NAU7802SGI and TMC6300-LA-T. By type, the board carries 38 resistors, 33 capacitors, 20 diodes, 10 switches, 9 ICs and 9 connectors.

Main components on the Biro 1

ESP32-S3-WROOM-1SN74LV1T34DBVAPDS-9306-065MT6701CTNAU7802SGITMC6300-LA-TBQ24075RGTTPS62132

Biro 1 bill of materials (BOM)

129 components, 40 distinct parts.

QtyPartRefs
1
ESP32-S3-WROOM-1
U1
2
SN74LV1T34DBV
U2, U7
1
APDS-9306-065
U3
1
MT6701CT
U4
1
NAU7802SGI
U5
1
TMC6300-LA-T
U6
1
BQ24075RGT
U8
1
TPS62132
U9
1
I2C
J1
1
Conn_01x08
J2
1
USB_C_Receptacle_USB2.0_16P
J3
4
Conn_01x03
J4, J5, J6, J7
1
S2B-PH-K-SLFSN
J8
1
Conn_01x03
J9
9
Keyswitch
S1, S2, S3, S4, S5, S6, S7, S8 +1
1
SLW-1274547-4A-RA-D
S10
9
IN-PI55TATPRPGPB
LED1, LED2, LED3, LED4, LED5, LED6, LED7, LED8 +1
9
1N4148W
D1, D2, D3, D4, D5, D6, D7, D8 +1
8
4691
D10, D12, D13, D14, D15, D16, D17, D18
1
D_TVS
D11
Show 20 more
QtyPartRefs
2
LED
D19, D20
1
2.2uH
L1
4
10uF
C1, C19, C28, C32
3
1uF
C2, C3, C15
15
0.1uF
C4, C5, C6, C7, C8, C9, C10, C11 +7
1
100nF
C13
3
10nF
C16, C18, C20
4
4.7uF
C23, C24, C29, C31
2
22uF
C25, C30
1
3.3nF
C26
14
10K
R1, R16, R17, R19, R20, R21, R22, R23 +6
2
5.1K
R2, R3
4
330
R4, R5, R6, R7
10
100K
R8, R11, R12, R13, R14, R15, R34, R35 +2
2
47
R9, R10
1
500
R18
1
1.1K
R28
1
1.13K
R29
2
1.5K
R32, R33
1
50K
R38

Biro 1 design files

The KiCad project lives in the PROJECT-BIRO/Biro-1 repository on GitHub; these links point at the commit this page was built from.

Biro 1: common questions

What microcontroller does the Biro 1 use?

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

How big is the Biro 1 PCB?

The Biro 1 measures 158.5 × 81.5 mm, has 4 copper layers and is 1.6 mm thick.

How many components are on the Biro 1?

129 components, from 40 distinct parts. The full bill of materials is listed on this page.

Where can I download the Biro 1 design files?

From the PROJECT-BIRO/Biro-1 repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the Biro 1 design in my own project?

Yes, under the terms of its MIT license, which PROJECT-BIRO chose for the repository.

Can I test firmware for the Biro 1 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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