ESP32-EVB Evaluation Board Schematic (Rev A)
Hardware schematic for the Olimex ESP32-EVB featuring the ESP-WROOM-32 module, 10/100 Ethernet, dual relays, Li-Po battery charging, and microSD card support.
Overview
This schematic provides the hardware design for the ESP32-EVB evaluation board from Olimex. The design is centered on the Espressif ESP-WROOM-32 module, providing Wi-Fi and Bluetooth connectivity. Key peripheral integration includes a Microchip LAN8710A Ethernet PHY for RMII-based wired networking, a Microchip MCP73833 Li-Po battery charger, and two 10A/250VAC RAS-0515 relays controlled via BC817 transistors. The power management section utilizes a Silergy SY8009 buck converter to provide a stable 3.3V rail. Additional features include a microSD card slot, an Olimex UEXT connector, two user buttons, and a 40-pin extension header for GPIO access.
Use Cases
- IoT gateway development with Ethernet and Wi-Fi
- Home automation and remote relay control
- Battery-powered IoT sensor nodes
- Industrial monitoring and control systems
- ESP32 hardware prototyping and evaluation
Topics
Referenced Parts
ESP-WROOM-32
Espressif Systems
U3 ESP-WROOM-32 MODULE
IRLML6402
Infineon
FET1 IRLML6402
MCP73833
Microchip
U1 MCP73833(MSOP10)
SY8009AAAC
Silergy
U2 SY8009AAAC(SOT23-5)
DG306-5.0-3P
Degson
TB3 DG306-5.0-3P
RJLD-060TC1
Link-PP
LAN1 RJLD-060TC1(LPJ4013EDNL)
DG306-5.0-2P
Degson
PWR2 NA(TB2 DG306-5.0-2P)
RAS-0515
SUN HOLD
REL1A RAS-0515
TFC-WXCP11-08-LF
TFC
MICRO_SD1 TFC-WXCP11-08-LF
T1107A
Unknown
T1107A(6x3,8x2,5MM)
BH10S
Unknown
UEXT1 BH10S
YDJ-1134
Unknown
PWRJ-2mm(YDJ-1134)
| LAN8710A-EZC | Microchip | U4 LAN8710A-EZC(QFN32) |
| SMBJ6.0A | Littelfuse | D2 SMBJ6.0A(DO-214AA) |
| 1N5819 | Stmicroelectronics | 1N5819(S4 SOD-123) |
| 1N5822 | Stmicroelectronics | D4 1N5822/SS34/SMA |
| BC817-40 | Nexperia | BC817-40(SOT23) |
| ESP-WROOM-32 | Espressif Systems | U3 ESP-WROOM-32 MODULE |
| IRLML6402 | Infineon | FET1 IRLML6402 |
| MCP73833 | Microchip | U1 MCP73833(MSOP10) |
| SY8009AAAC | Silergy | U2 SY8009AAAC(SOT23-5) |
| DG306-5.0-3P | Degson | TB3 DG306-5.0-3P |
| RJLD-060TC1 | Link-PP | LAN1 RJLD-060TC1(LPJ4013EDNL) |
| DG306-5.0-2P | Degson | PWR2 NA(TB2 DG306-5.0-2P) |
| RAS-0515 | SUN HOLD | REL1A RAS-0515 |
| TFC-WXCP11-08-LF | TFC | MICRO_SD1 TFC-WXCP11-08-LF |
| T1107A | Unknown | T1107A(6x3,8x2,5MM) |
| BH10S | Unknown | UEXT1 BH10S |
| YDJ-1134 | Unknown | PWRJ-2mm(YDJ-1134) |