Olimex ESP32-EVB Rev H Hardware Design Document
Hardware schematic for the ESP32-EVB evaluation board featuring Ethernet, CAN bus, dual relays, infrared communication, MicroSD support, and LiPo battery charging.
Overview
This design document provides the Rev H hardware architecture for the Olimex ESP32-EVB evaluation board. The system is based on the Espressif ESP32-WROOM-32D module and includes a Microchip LAN8710A-EZC for 10/100 Ethernet connectivity. Additional peripheral interfaces include a Microchip MCP2562 CAN transceiver, a WCH CH340T USB-to-UART bridge, and two Relpol RAS-0515 5V relays. The board also integrates infrared transmit/receive capabilities, a MicroSD card slot, and a LiPo battery management circuit featuring the BL4054B charger. Power regulation is handled by a Silergy SY8089AAAC DC-DC converter supporting 5V input.
Use Cases
- Industrial IoT gateways
- Home automation and relay control
- Remote sensor monitoring via Ethernet or CAN
- Battery-powered wireless control systems
- Infrared remote control prototyping
Topics
Referenced Parts
ESP32-WROOM-32D-4MB
Espressif Systems
U3 ESP32-WROOM-32D-4MB
RPM7236-H8
ROHM Semiconductor
U7 RPM7236-H8
CH340T
WCH
U5 CH340T(SSOP20W)
IR333-A
Everlight Electronics
LED3 LED/IR333-A/5mm
RJLD-060TC1
Link-PP
LAN1 RJLD-060TC1(LPJ4013EDNL)
BL4054B-42TPRN
Shanghai Belling
U1 BL4054B-42TPRN(SOT23-5)
SY8089AAAC
Silergy
U2 SY8089AAAC(SOT23-5)
MISB-SWMM-5B-LF
Taktek
USB-UART1 MISB-SWMM-5B-LF(USB_MICRO)
TFC-WXCP11-08-LF
Taktek
MICRO_SD1 TFC-WXCP11-08-LF
WPM2015-3/TR
Willsemi
FET1 WPM2015-3/TR
BAT54C
Nexperia
U9 BAT54C(SOT23-3)
RAS-0515
Relpol
REL1A RAS-0515
1N5819S4
Willas
D1 1N5819S4(SOD-123)
| NR3015T2R2M | Taiyo Yuden | L2 2.2uH/1.5A/DCR=72mR/20%/3.00x3.00x1.50mm/CD32(NR3015T2R2M) |
| SMBJ6.0A | Littelfuse | D2 SMBJ6.0A(DO-214AA) |
| 1N5822 | Stmicroelectronics | D4 1N5822/SS34/SMA |
| SS34 | Vishay | D4 1N5822/SS34/SMA |
| 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) |
| BC817-40 | Nexperia | Q1 BC817-40(SOT23) |
| BSS138 | Onsemi | FET4 BSS138 |
| ESP32-WROOM-32D-4MB | Espressif Systems | U3 ESP32-WROOM-32D-4MB |
| RPM7236-H8 | ROHM Semiconductor | U7 RPM7236-H8 |
| CH340T | WCH | U5 CH340T(SSOP20W) |
| IR333-A | Everlight Electronics | LED3 LED/IR333-A/5mm |
| RJLD-060TC1 | Link-PP | LAN1 RJLD-060TC1(LPJ4013EDNL) |
| BL4054B-42TPRN | Shanghai Belling | U1 BL4054B-42TPRN(SOT23-5) |
| SY8089AAAC | Silergy | U2 SY8089AAAC(SOT23-5) |
| MISB-SWMM-5B-LF | Taktek | USB-UART1 MISB-SWMM-5B-LF(USB_MICRO) |
| TFC-WXCP11-08-LF | Taktek | MICRO_SD1 TFC-WXCP11-08-LF |
| WPM2015-3/TR | Willsemi | FET1 WPM2015-3/TR |
| BAT54C | Nexperia | U9 BAT54C(SOT23-3) |
| RAS-0515 | Relpol | REL1A RAS-0515 |
| 1N5819S4 | Willas | D1 1N5819S4(SOD-123) |