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Adapter board r2

picafe·bicolor-matrix-v2·adapter-board-r2/adapter-board-r2.kicad_pcb

Adapter board r2 layout, top view — open source ESP32 board by picafe

About the Adapter board r2

Adapter board r2 is an open source ESP32 PCB design by picafe, published on GitHub. It is a 4-layer board measuring 68.4 × 33.4 mm, with 51 components from 30 distinct parts.

Its main chip is the ESP32-C3-WROOM-02, from the ESP32 family. Other key parts include the USBLC6-2SC6, CH340X, AP2114HA-3.3TRG1, YSN8900AP3 and SHT4X. By type, the board carries 18 capacitors, 10 ICs, 10 resistors, 4 connectors, 3 transistors and 2 fuses.

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

From the project

A 32x8 bicolor LED matrix module composed of 4 8x8 matrices based on the Holtek HT16K33A I2C LED driver. V1 paired it with a stacked adapter (RP2040 Zero + DS3231 module); V2 redesigns the matrix routing and puts an ESP32-C3, RTC, and environment sensors on a half-length adapter

A 32x8 bicolor LED matrix module composed of 4 8x8 matrices based on the Holtek HT16K33A I2C LED driver. V1 paired it with a stacked adapter (RP2040 Zero + DS3231 module); V2 redesigns the matrix routing and puts an ESP32-C3, RTC, and environment sensors on a half-length adapter board behind the display.

Inspired by the common 32x8 red LED matrix modules that use the MAX7219 IC, I wanted to make my own module but with more colours and functionality, while keeping the same asthetic.

Adapter board r2, from the project README
From the project README

Main components on the Adapter board r2

ESP32-C3-WROOM-02USBLC6-2SC6CH340XAP2114HA-3.3TRG1YSN8900AP3SHT4XSCD40-D-R2BMP580LIS2DW12TRSTCC4

Adapter board r2 bill of materials (BOM)

51 components, 30 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
ESP32-C3-WROOM-02
U1
1
USBLC6-2SC6
U2
1
CH340X
U3
1
AP2114HA-3.3TRG1
U4
1
YSN8900AP3
YXC(扬兴晶振)
U5
1
SHT4X
SHT4x
U6
1
SCD40-D-R2
U7
1
BMP580
Bosch(博世)
U8
1
LIS2DW12TR
ST(意法半导体)
U9
1
STCC4
U10
1
UMH3N
Q1
2
BSS138W
hongjiacheng
Q2, Q3
1
USB_C_RECEPTACLE_USB2.0_14P
USB_C_Receptacle_USB2.0_14P
J1
1
CONN_01X07_PIN
Conn_01x07_Pin
J2
1
CONN_01X02_SOCKET
Conn_01x02_Socket
J3
1
CONN_01X04_SOCKET
Conn_01x04_Socket
J4
1
C7498149
Battery_Cell
BT1
2
1.1A
F1, F2
2
C720477
Tactile Button, 160gf
XUNPU
S1, S2
1
B5817WS
hongjiacheng
D1
Show 10 more
QtyPartRefs
1
1UF
1uF
Samsung Electro-Mechanics
C1
1
10UF
10uF
Samsung Electro-Mechanics
C2
5
100NF
100nF
YAGEO
C3, C5, C11, C12, C18
8
100NF
100nF
Samsung Electro-Mechanics
C4, C8, C9, C10, C13, C14, C16, C17
2
4.7UF
4.7uF
FH(Guangdong Fenghua Advanced Tech)
C6, C7
1
10UF
10uF
Samsung Electro-Mechanics
C15
2
10kΩ
UNI-ROYAL(Uniroyal Elec)
R1, R2
2
5.1kΩ
UNI-ROYAL(Uniroyal Elec)
R3, R4
2
0Ω
UNI-ROYAL(Uniroyal Elec)
R6, R8
4
4.7kΩ
UNI-ROYAL(Uniroyal Elec)
R9, R10, R11, R12

Adapter board r2 design files

The KiCad project lives in the picafe/bicolor-matrix-v2 repository on GitHub; these links point at the commit this page was built from.

Adapter board r2: common questions

What microcontroller does the Adapter board r2 use?

The Adapter board r2 is built around the ESP32-C3-WROOM-02, from the ESP32 family.

How big is the Adapter board r2?

The Adapter board r2 measures 68.4 × 33.4 mm, has 4 copper layers and is 1.6 mm thick.

How many components are on the Adapter board r2?

51 components, from 30 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 Adapter board r2 design files?

From the picafe/bicolor-matrix-v2 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 Adapter board r2 design in my own project?

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

Can I test firmware for the Adapter board r2 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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