Content for Relay

DS18b20 Temperature Sensor As a Thermostat

“This Instructable shows how I built the thermostat for my home-assistant using an ESP8266 and MQTT with a DS18b20 temperature sensor.”

Arduino “Blink To Talk” using Charlieplexing

“This project can be classified as an AAC (Alternative and Augmentative Communication) device, which are used as a means of communication for those suffering from debilitating diseases like ALS and the like, that result in complete paralysis and near-total loss …

Arduino Controlled Lock Box With Solenoid and RFID

“The RFID Lock Box combines Arduino, RFID and a Solenoid to make your very own personal safe! The Lock Box will only open to Key Cards that you’ve programmed into the system, locking everyone else out! This guide will …

Burglar Alarm System

“I had a “brand name” burglar alarm system installed in this house many years ago, but when I switched my phone system to use VOIP over my internet, the phone connection to the alarm system was disconnected and it was …

Controlling relays with 24V coils

“Ive got a lot of relays in the parts bin with 24V coils. This is a common control voltage in industrial and telecommunications equipment, so the relays are common in surplus equipment. Many will actuate equally well on AC or …

Mains Voltage Relay Test Jig

“For some reason I always end up needing a reason to switch a mains powered device with a microcontroller so I decided to finally make a test jig with some spare parts I have lying around. Hopefully this will be …

Multi Voltage Ardu Droid Bluetooth Controlled Indoor Gardening

“This is a multi voltage (12, 5, 3.3 V) circuit board with arduino Atmega 2560 and 8 relays that control lights and Irrigation of plants through Ardu droid Bluetooth android application”

ESP 8266 Standalone WiFI Relay Control

“To control a relay switch using esp8266 in standalone mode(without arduino,pic or any other Micro-controller) via Web-UI”

Garage Door Monitor

“This IoT project is designed to create a useful device and also a framework for other devices.”

Using an esp8266 arduino to control a relay using home-assistant

“This Instructable shows how to connect a relay module to an esp8266, something that should be straight forward but needs a few extra components to make the relay work correctly if you’re using the small esp device in the …