---
title: "DEVELOPMENT OF POWER SUPPLY BACKUP BOARD FOR EDGE DEVICE"
url: "https://maker.wiznet.io/jaden/projects/development-of-power-supply-backup-board-for-edge-device/"
markdown_url: "https://maker.wiznet.io/jaden/projects/development-of-power-supply-backup-board-for-edge-device/md"
type: "UCC: User Created Content"
author: "masaki kohei"
author_url: "https://speakerdeck.com/koheimasaki/development_of_power_backup_boards_for_edge_devices"
editor: "WIZnet"
editor_url: "https://maker.wiznet.io/"
original_author: "masaki kohei"
original_url: "https://speakerdeck.com/koheimasaki/development_of_power_backup_boards_for_edge_devices"
published: "2025-07-31"
language: "en"
hardware: ["WIZnet W5500"]
likes: 0
views: 4267
comments: 0
source: "WIZnet Makers (https://maker.wiznet.io/)"
---

# DEVELOPMENT OF POWER SUPPLY BACKUP BOARD FOR EDGE DEVICE

> DEVELOPMENT OF POWER SUPPLY BACKUP BOARD FOR EDGE DEVICE

Original author: masaki kohei (source: https://speakerdeck.com/koheimasaki/development_of_power_backup_boards_for_edge_devices)

## Components

- **WIZnet W5500** x 1 ([docs](https://docs.wiznet.io/Product/Chip/Ethernet/W5500))

WIZnet parts: W5500 ([Datasheet](https://docs.wiznet.io/Product/Chip/Ethernet/W5500/datasheet?utm_source=maker&utm_medium=project&utm_campaign=w5500), [product hub](https://maker.wiznet.io/products/w5500/))

## Article

## W5500 Ethernet Module in a UPS-Enabled Power Backup Board

Hello WIZnet Community!

At the **17th Open Edge Device Study Group (Oct 16, 2024, Sony Creative Lounge)**,
B&B Lab. presented a practical IoT use case featuring the **W5500 Ethernet module**.

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### 📌 Background

IoT devices deployed in the field often face challenges:

Power outages causing device shutdown

Unstable network connectivity in remote areas

Risk of data loss during long unattended operations

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### ⚙️ The Solution – UPS Power Backup Board

![](https://maker.wiznet.io/upload/ckeditor5/13082115%5F1755880774%2Epng)

The team developed a **supercapacitor-based UPS board** that:

Keeps devices alive for several minutes during power loss → safe shutdown

Accepts **AC 100–240V input** for easy deployment

Compact enough to fit inside waterproof cases together with Raspberry Pi devices

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### 🌐 Why W5500?

**Stable Ethernet Connectivity**

Unlike LTE/WiFi, W5500 ensures reliable wired Ethernet.

Verified on Raspberry Pi OS as `eth0` with successful communication.

**Easy SPI Integration**

Simple connection via SPI without complex drivers.

**Cost-Effective and Reliable**

Off-the-shelf modules used for quick prototyping and evaluation.

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### 🎥 Test Results

**Backup Time**: Over 6 minutes with Pi Zero 2 and peripherals

**Power Loss Test**: System remained stable until safe shutdown

**Network Check**: W5500 module recognized and worked fine on Linux

**Outdoor Use**: Device placed inside waterproof/dustproof case

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### 🚀 Future Prospects

Suitable for **smart agriculture, remote monitoring, smart cities**

Can be extended to high-performance devices like **Jetson and CM4**

Future updates include battery level monitoring via I2C

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✅ This case shows how WIZnet’s **W5500 module** is more than just an Ethernet chip —
it is a **reliable networking backbone** for building robust IoT solutions.

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Source: https://maker.wiznet.io/jaden/projects/development-of-power-supply-backup-board-for-edge-device/