---
title: "DIY Ethernet shield (W5100)"
url: "https://maker.wiznet.io/eric_g/projects/diy-ethernet-shield-w5100/"
markdown_url: "https://maker.wiznet.io/eric_g/projects/diy-ethernet-shield-w5100/md"
type: "UCC: User Created Content"
author: "system"
author_url: "https://forum.arduino.cc/t/diy-ethernet-shield-w5100/71198"
editor: "WIZnet"
editor_url: "https://maker.wiznet.io/"
original_author: "system"
original_url: "https://forum.arduino.cc/t/diy-ethernet-shield-w5100/71198"
license: "GNU General Public License, version 3 or later (GPL3+)"
published: "2022-12-02"
language: "en"
hardware: ["WIZnet W5100S"]
likes: 6
views: 678
comments: 1
source: "WIZnet Makers (https://maker.wiznet.io/)"
---

# DIY Ethernet shield (W5100)

> I've made an Ethernet shield compatible with the official one on through-hole components.

Original author: system (source: https://forum.arduino.cc/t/diy-ethernet-shield-w5100/71198)

## Components

- **WIZnet W5100S** x 1 ([docs](https://docs.wiznet.io/Product/Chip/Ethernet/W5100S))

## Article

This project was introduced on **forum.aduino.cc by ID systems Sept 2011**.

The author made a **DIY W5100 ethernet shield **compatible with the official one on through-hole components.

Works well just like the original Ethernet shield. Schematics are similar to the official one,

The Author has** 47nf cap on RST **line to avoid the reset problem with W5100 related to ARDUINO.

The author had to reference **Wiznet's reference schematics, Ethernet shields fromArduino and Freetronics** and had to learn about PCB routing.

![](https://maker.wiznet.io/upload/ckeditor5/94080735%5F1670007186%2Epng)

Once you solder the **0.4mm-spaced LQFP chip**

The author used **gEDA suite** to produce board schematics and layouts, which required little custom symbols to be made. I've attached the schematics image.

![](https://maker.wiznet.io/upload/ckeditor5/94080735%5F1670007213%2Epng)

**The second revision** was under construction at this posting (he hopes to get PCB's manufactured by summer).

A better main board with **SD card**, DS1307 and **slots for radio modules** (**RFM23** and simple ASK TX/RX modules) is in the works too, pic related.

I'm doing this for yet another house automation system.

I'll post schematics and gerbers when it's done.

![](https://maker.wiznet.io/upload/ckeditor5/94080735%5F1670007455%2Epng)

This post was forced to wake up by the comment which was the question of W5100.

Read this article, it is very useful for HW ethernet makers.

https://forum.arduino.cc/t/diy-ethernet-shield-w5100/71198

---

Source: https://maker.wiznet.io/eric_g/projects/diy-ethernet-shield-w5100/