Olimex ESP32-EVB Rev B Evaluation Board Schematic
Schematic for the Olimex ESP32-EVB Rev B, an ESP32-based development board featuring Ethernet, CAN bus, dual relays, LiPo charging, and infrared communication.
Overview
This document provides the complete circuit schematic for the Olimex ESP32-EVB Rev B evaluation board. The design is based on the Espressif ESP-WROOM-32 module and incorporates a Microchip LAN8710A-EZC 10/100 Ethernet PHY for wired connectivity. For industrial applications, the board includes a Microchip MCP2551-I/SN CAN transceiver and two RAS-0515 relays for load switching. The power section utilizes a Silergy SY8009AAAC buck converter for 3.3V regulation and a Microchip MCP73833 for LiPo battery charging. Additional features include a WCH CH340T USB-to-UART bridge, a micro SD card interface, an infrared transceiver (RPM7236-H8/IR333-A), and a 40-pin expansion header for GPIO access.
Use Cases
- Industrial IoT Gateway
- Remote Relay Control System
- CAN Bus to Wi-Fi/Ethernet Bridge
- Battery-powered Wireless Monitoring
- Home Automation Controller
Topics
Referenced Parts
ESP-WROOM-32
Espressif Systems
ESP-WROOM-32 MODULE
MCP73833
Microchip
U1 MCP73833(MSOP10)
BD5230G-TR
Rohm Semiconductor
U8 BD5230G-TR(SSOP5/SOT-23-5)
RPM7236-H8
Rohm Semiconductor
U7 RPM7236-H8
SY8009AAAC
Silergy
U2 SY8009AAAC(SOT23-5)
CH340T
WCH
U5 CH340T(SSOP20W)
1N5819S4
Diodes Incorporated
D1 1N5819S4(SOD-123)
IRLML6402
Infineon Technologies
FET1 IRLML6402
BAT54C
Nexperia
BAT54C(SOT23-3)
RAS-0515
Relpol
REL1A RAS-0515
DG306-5.0-2P
Degson Electronics
PWR2 NA(TB2 DG306-5.0-2P)
DG306-5.0-3P
Degson Electronics
CON1 TB3 DG306-5.0-3P
SS34
Generic
1N5822/SS34/SMA
T1107A
Generic
BUT1 T1107A(6x3,8x2,5MM)
MISB-SWMM-5B-LF
Olimex
USB-UART1 MISB-SWMM-5B-LF(USB_MICRO)
TFC-WXCP11-08-LF
Olimex
MICRO_SD1 TFC-WXCP11-08-LF
YDJ-1134
Olimex
PWR1 PWRJ-2mm(YDJ-1134)
BH10S
Generic
UEXT1 BH10S
DW02R
Generic
BAT1 DW02R
| IR333-A | Everlight | LED3 LED/IR333-A/5mm |
| SMBJ6.0A | Stmicroelectronics | D2 SMBJ6.0A(DO-214AA) |
| LPJ4013EDNL | Link-Pp | LAN1 RJLD-060TC1(LPJ4013EDNL) |
| LAN8710A-EZC | Microchip | U4 LAN8710A-EZC(QFN32) |
| MCP2551-I/SN | Microchip | U6 MCP2551-I/SN(SOIC-8_150mil) |
| BC817-40 | Nexperia | BC817-40(SOT23) |
| ESP-WROOM-32 | Espressif Systems | ESP-WROOM-32 MODULE |
| MCP73833 | Microchip | U1 MCP73833(MSOP10) |
| BD5230G-TR | Rohm Semiconductor | U8 BD5230G-TR(SSOP5/SOT-23-5) |
| RPM7236-H8 | Rohm Semiconductor | U7 RPM7236-H8 |
| SY8009AAAC | Silergy | U2 SY8009AAAC(SOT23-5) |
| CH340T | WCH | U5 CH340T(SSOP20W) |
| 1N5819S4 | Diodes Incorporated | D1 1N5819S4(SOD-123) |
| IRLML6402 | Infineon Technologies | FET1 IRLML6402 |
| BAT54C | Nexperia | BAT54C(SOT23-3) |
| RAS-0515 | Relpol | REL1A RAS-0515 |
| DG306-5.0-2P | Degson Electronics | PWR2 NA(TB2 DG306-5.0-2P) |
| DG306-5.0-3P | Degson Electronics | CON1 TB3 DG306-5.0-3P |
| SS34 | Generic | 1N5822/SS34/SMA |
| T1107A | Generic | BUT1 T1107A(6x3,8x2,5MM) |
| MISB-SWMM-5B-LF | Olimex | USB-UART1 MISB-SWMM-5B-LF(USB_MICRO) |
| TFC-WXCP11-08-LF | Olimex | MICRO_SD1 TFC-WXCP11-08-LF |
| YDJ-1134 | Olimex | PWR1 PWRJ-2mm(YDJ-1134) |
| BH10S | Generic | UEXT1 BH10S |
| DW02R | Generic | BAT1 DW02R |