Olimex ESP32-EVB Evaluation Board Schematic Revision I
Schematic for the Olimex ESP32-EVB, an ESP32-based development board with Ethernet, CAN bus, LiPo charger, dual relays, IR transceiver, and MicroSD support.
Overview
This hardware design document provides the complete circuit schematic for the Olimex ESP32-EVB Revision I. The board is centered on the Espressif Systems ESP-WROOM-32 module and features wired 10/100 Ethernet via a Microchip LAN8710A-EZC PHY. It includes a WCH CH340T USB-to-UART bridge for programming and a Microchip MCP2562-E/SN transceiver for CAN bus communication. Power management is handled by a Silergy SY8089AAAC DC-DC converter and a Shanghai Belling BL4054B-42TPRN LiPo charger. Integrated peripherals include two Relpol RAS-0515 relays, a MicroSD card slot, and an infrared transceiver using the RPM7236-H8 receiver and Everlight IR333-A transmitter. The design also incorporates a UEXT expansion connector and detailed bootstrapping pin configurations for boot mode selection.
Use Cases
- Industrial IoT Gateway Development
- CAN Bus to WiFi/Ethernet Bridging
- Remote Monitoring and Power Switching
- Smart Home Automation Controller
- Battery-powered Embedded Systems with Ethernet Connectivity
Topics
Referenced Parts
ESP-WROOM-32
Espressif Systems
U3 ESP-WROOM-32
1N5819S4
Diodes Incorporated
D5 1N5819S4(SOD-123)
BAT54C
Diodes Incorporated
U10 BAT54C(SOT23-3)
IR333-A
Everlight Electronics
LED3 LED/IR333-A/5mm
RPM7236-H8
ROHM Semiconductor
U7 RPM7236-H8
BL4054B-42TPRN
Shanghai Belling
U1 BL4054B-42TPRN(SOT23-5)
SY8089AAAC
Silergy
U2 SY8089AAAC(SOT23-5)
CH340T
WCH
U5 CH340T(SSOP20W)
WPM2015-3/TR
Willsemi
FET2 WPM2015-3/TR
DG306-5.0-3P
Degson Electronics
CON2 TB3 DG306-5.0-3P
RAS-0515
Relpol
REL1A RAS-0515
TFC-WXCP11-08-LF
TFC
MICRO_SD1 TFC-WXCP11-08-LF
T1107A
Highly Electronic
RST1 T1107A(6x3,8x2,5MM)
| LAN8710A-EZC | Microchip | U4 LAN8710A-EZC(QFN32) |
| MCP2562-E/SN | Microchip | U6 MCP2562-E/SN(SOIC-8_150mil) |
| NCP303LSN27T1G | Onsemi | U8 NCP303LSN27T1G(SOT-23-5) |
| LPJ4013EDNL | Link-Pp | LAN1 RJLD-060TC1(LPJ4013EDNL) |
| SMBJ6.0A | Littelfuse | D2 SMBJ6.0A(DO-214AA) |
| NR3015T2R2M | Taiyo Yuden | L2 2.2uH/1.5A/DCR=72mR/20%/3.00x3.00x1.50mm/CD32(NR3015T2R2M) |
| BSS138 | Onsemi | FET4 BSS138 |
| 1N5822 | Stmicroelectronics | D6 1N5822/SS34/SMA |
| BC817-40 | Nexperia | Q5 BC817-40(SOT23) |
| ESP-WROOM-32 | Espressif Systems | U3 ESP-WROOM-32 |
| 1N5819S4 | Diodes Incorporated | D5 1N5819S4(SOD-123) |
| BAT54C | Diodes Incorporated | U10 BAT54C(SOT23-3) |
| IR333-A | Everlight Electronics | LED3 LED/IR333-A/5mm |
| RPM7236-H8 | ROHM Semiconductor | U7 RPM7236-H8 |
| BL4054B-42TPRN | Shanghai Belling | U1 BL4054B-42TPRN(SOT23-5) |
| SY8089AAAC | Silergy | U2 SY8089AAAC(SOT23-5) |
| CH340T | WCH | U5 CH340T(SSOP20W) |
| WPM2015-3/TR | Willsemi | FET2 WPM2015-3/TR |
| DG306-5.0-3P | Degson Electronics | CON2 TB3 DG306-5.0-3P |
| RAS-0515 | Relpol | REL1A RAS-0515 |
| TFC-WXCP11-08-LF | TFC | MICRO_SD1 TFC-WXCP11-08-LF |
| T1107A | Highly Electronic | RST1 T1107A(6x3,8x2,5MM) |