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“In this tutorial, you’ll learn everything you need to know about the MQTT messaging protocol, why you would want to use it, and how it’s implemented. In a nutshell, MQTT uses your existing Internet home network to send …
“This instructable explains how to make a monochrome camera using an Omnivision OV7670 image sensor, an Arduino microcontroller, a few jumper wires, and Processing 3 software. Experimental software for obtaining a color image is also presented. Press the c key …
“I was wanting to test software for an upcoming project and required a mechanical arm to do so.I chose basic forms since the goal was to test function. Future revisions have better aesthetics. This was designed and built on …
“Build a sci-fi inspired bike light using Adafruit Feather and NeoPixels. Use an RGB LED Button to cycle through different colors and animations. The button will actually match the colors of the NeoPixels! 3D Printed Headlight This is a 3D …
“In the buzzer round of quiz contests, the question is thrown open to all the teams. The person who knows the answer hits the buzzer first and then answers the question. Sometimes two or more players hit the buzzer almost …
“Relay switching is a fundamental element of electrical control systems. Dating back to at least 1833, early electromagnetic relays were developed for telegraphy systems. Prior to the invention of vacuum tubes, and later semiconductors, relays were used as amplifiers. That …
“This project was inspired by Becky Stern and Lady Ada’s Adafruit Gemma Hoop Earrings and the wonderful folks with the FastLED library. This instructable will show you how to create a beautiful LED Pendant with one or more LED …
“Upon scanning the right tag and entering right pass, it will open door and send confirmation message otherwise it will send alert message. In the previous post, you learned about RFID and keypad based door lock system in which you …
“I’ve been doing some LoRa projects lately in order to learn as much as I can about this exciting new radio technology (see this LoRa mesh networking project and this LoRa weather station). ATmega328-based Moteino modules work great for …
“The light we observe, for example the sun’s light, consists of light of various wavelengths. Also, substances have the property of absorbing light of a specific wavelength. So, if you observe the spectra of distant star’s light on …