Relay

A relay is an electrically operated switch. It consists of a set of input terminals for a single or multiple control signals, and a set of operating contact terminals. The switch may have any number of contacts in multiple contact forms, such as make contacts, break contacts, or combinations thereof.

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ESP32 & Cellular IoT CI Build Status Light

“Monitor your CI builds with the blues wireless Notecard and an ESP32 Feather! I’ve been a software engineer for over twenty years, and one of the things that has always fascinated me is testing. Unit testing, integration testing, TDD …

ESP32 Smart Home System With Alexa App & Manual Switches

“In this IoT project, I have shown how to make IoT based Smart Home Automation Using Amazon Alexa & ESP32 to control 8 home appliances from the manual switch & Amazon Alexa App. If the internet is not available, then you can …

SafetyLock: a Smart Lock Made With Raspberry Pi (Fingerprint and RFID)

“Have you ever wanted a more accessible way to secure your house? If so, this is the solution for you! I made SafetyLock, this is a lock that can be opened with your fingerprint, a RFID badge and even through …

DIY Automatic Musical Christmas Lights (MSGEQ7 + Arduino)

“So every year I say am going to do this and never get around to doing it because I procrastinate a lot. 2020 is a year of change so I say this is the year to do it. So hope …

Circadia - sunrise lamp

“I love sleeping. More to the point, usually, I really don’t love waking up. I drag myself around and it usually takes until I arrive at work before I am really what you might call awake. Alarm clocks are …

Analog Light Sensor + Light Sensitive Switch using OPT101

“You may have seen many light-sensitive switch circuits based on an LDR sensor. Usually, the sensitivity of the LDR based light sensor is poor. We wanted a very sensitive light switch hence we decided to make a circuit based on …

Automatic Watering System for My Plants

“When the soil is dry, Arduino will command the water pump to run. Our plant is absolutely cheerful anytime! This is my first project. I love plants, so I created an automatic watering system. Our system measures the soil moisture …

Guitar Looper Fade Out and Tremolo… for Free!

“Once upon a time, when electric guitar had to sound like a guitar and every deviation was called unwanted distortion, there were no guitar effects except… your friend and the potentiometer, working together! Practically while you were playing, your friend …

My not so stupid home

“Control and read light, temperature, humidity, feeder and water pump for cat with SD card, HTTP server on NodeMcu and Android client app. Summary I recently bought NodeMcu Lua ESP8266 controller and decided to start some home automation (or home …

Home Automation Using Arduino and WiFi Module ESP01 | Arduino ESP8266 Control Relay

“In this IoT project, I have shown how to make IoT based Home Automation using Arduino and WiFi module ESP01 to control relays from the manual switch, smartphone, IR remote. This smart relay also can sense the room temperature and …