Olimex ESP8266-EVB-BAT Revision B Schematic and Design Document
Hardware design document for the ESP8266-EVB-BAT Revision B, featuring an ESP8266EX module, relay control, Li-Po battery charging, and power management circuits.
Overview
This document detail the hardware architecture of the Olimex ESP8266-EVB-BAT Revision B development board. Centered on the Espressif ESP8266EX Wi-Fi SoC, the design incorporates a Rayex RAS-05-15 relay for load switching and a Microchip MCP73833-AMI/UN for Li-Po battery charging. Power regulation is handled by the Silergy SY8009AAAC step-down converter for 3.3V rails and the SY7208 boost converter for 5V requirements. The board includes battery protection via the Fortune Semiconductor DW02R, a UEXT connector for peripheral expansion, and a dedicated reset button introduced in Revision B. Connectivity includes GPIO access, status LEDs, and a 5V DC power jack.
Use Cases
- Battery-powered Wi-Fi IoT applications
- Remote relay switching via Wi-Fi
- Home automation prototyping
- ESP8266 hardware evaluation
- Industrial control with battery backup
Topics
Referenced Parts
ESP8266EX
Espressif Systems
ESP8266_DEV
IRLML6402
Infineon Technologies
IRLML6402
SY7208
Silergy Corp
SY7208(SOT23-6)
SY8009AAAC
Silergy Corp
SY8009AAAC(SOT23-5)
RAS-05-15
Rayex Electronics
RAS-05-15
DW02R
Fortune Semiconductor
DW02R
| SMBJ6.0A | Littelfuse | SMBJ6.0A |
| MCP73833-AMI/UN | Microchip | MCP73833-AMI/UN |
| 1N5822 | Stmicroelectronics | 1N5822/SS34/SMA |
| BC817-40 | Nexperia | BC817-40(SMD) |
| SS34 | Onsemi | 1N5822/SS34/SMA |
| ESP8266EX | Espressif Systems | ESP8266_DEV |
| IRLML6402 | Infineon Technologies | IRLML6402 |
| SY7208 | Silergy Corp | SY7208(SOT23-6) |
| SY8009AAAC | Silergy Corp | SY8009AAAC(SOT23-5) |
| RAS-05-15 | Rayex Electronics | RAS-05-15 |
| DW02R | Fortune Semiconductor | DW02R |