ESP32 PCB Design Inquiry

D

dorianduda

I need a pcb which consists of esp32 and PCF8575 and couple of screw terminals.

flux

Let’s clarify your design requirements. I have 2 questions to get started. First question:
  1. Which ESP32 variant would you like to use? For example, would you prefer ESP32-WROOM-32 or ESP32-C3?
D

dorianduda

esp32-wroom-32

flux

Great. For the I/O expander, would you like to use the standard PCF8575 part? Also, please let me know how many screw terminal blocks you need (e.g., 2 blocks for power and I/O, or another number)?
Confirm PCF8575 usage
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Schematic

Layout

3D View

Schematic of ESPRSSO32 Smart Scale AI Auto Layout [Example] b4uB
PP5V0
PP3V3
PP3V3_SPI
PP3V3
PP3V3
PP12V0
PP3V3
C7
Capacitance
1uF
C13
Capacitance
1uF
PG_PP5V0
C18
Capacitance
1uF
USBC2.0_D_N
SPI_MISO
SPI_SCK
USBC2.0_D_P
C10
Capacitance
1uF
C15
Capacitance
1uF
SPI_SCK
C5
Capacitance
1uF
INT_ADC_DRDY
GPIO_SW1
C12
Capacitance
1uF
I2C_SDA
GPIO_SW2
SPI_MISO
C24
Capacitance
1uF
SPI_MOSI
I2C_SCL
SPI_CS
C31
Capacitance
.1uF
VOS
SPI_CS
SPI_MOSI
R3
Resistance
10kΩ
H4
H1
C2
Manufacturer Part Number
OPT
C25
Capacitance
22uF
Y1
R7
Resistance
100kΩ
L1
Inductance
2.2nH
U2
MCU_TXD
H2
C8
Capacitance
13pF
H3
C6
Capacitance
1.2pF
L2
Inductance
2.2nH
MCU_RXD
MCU_BOOT
C4
Capacitance
13pF
R8
Resistance
953kΩ
IC1
J1
J2
R6
Resistance
180kΩ
C22
Capacitance
10uF
C21
Capacitance
10uF
L4
C30
Capacitance
10uF
L3
Inductance
2.2uH

ESPRSSO32 Smart Scale AI Auto Layout [Example] b4uB