---
title: "Arduino-Based LAN-Controlled Input Scanner / Relay Multiplexer"
url: "https://maker.wiznet.io/taylor/projects/arduino-based-lan-controlled-input-scanner-relay-multiplexer/"
markdown_url: "https://maker.wiznet.io/taylor/projects/arduino-based-lan-controlled-input-scanner-relay-multiplexer/md"
type: "UCC: User Created Content"
author: "Gough Lui"
author_url: "https://goughlui.com/2021/04/18/project-arduino-based-lan-controlled-input-scanner-relay-multiplexer/"
editor: "WIZnet"
editor_url: "https://maker.wiznet.io/"
original_author: "Gough Lui"
original_url: "https://goughlui.com/2021/04/18/project-arduino-based-lan-controlled-input-scanner-relay-multiplexer/"
published: "2022-09-30"
language: "en"
tags: ["Home Automation"]
hardware: ["Arduino Ethernet Shield"]
likes: 5
views: 8177
comments: 0
source: "WIZnet Makers (https://maker.wiznet.io/)"
---

# Arduino-Based LAN-Controlled Input Scanner / Relay Multiplexer

> Arduino-Based LAN-Controlled Input Scanner / Relay Multiplexer

Original author: Gough Lui (source: https://goughlui.com/2021/04/18/project-arduino-based-lan-controlled-input-scanner-relay-multiplexer/)

## Components

- **Arduino Ethernet Shield** x 1 ([docs](https://docs.arduino.cc/retired/shields/arduino-ethernet-shield-without-poe-module))

## Article

Original : <https://goughlui.com/2021/04/18/project-arduino-based-lan-controlled-input-scanner-relay-multiplexer/>

![](https://maker.wiznet.io/upload/ckeditor5/713612663%5F1664558518%2Ejpg)

The “stack” is getting quite big, but still fits well. The exposed rear contacts of the PCB may present a bit of a safety issue if touched, but I don’t anticipate use with anything more than about 24V. Instead of Ersin 362, this particular board was assembled using Multicore 0.8mm 60/40 Hydro-X flux solder which seems to be a more effective flux but requires water-based cleaning and has a bit of an irritating smell.

Tests of this board were successful – the relays clicked in and out on command and the connections were made and broken as expected.

I decided to make a second, nicer-looking board. This time, I pre-tinned the pads and mounted SMD components first by hot air, then the through-hole components, choosing a more appropriate voltage rating for the capacitor to have a reasonable height.

![](https://maker.wiznet.io/upload/ckeditor5/713612663%5F1664558569%2Ejpg)

---

Source: https://maker.wiznet.io/taylor/projects/arduino-based-lan-controlled-input-scanner-relay-multiplexer/