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Getting Started with Node-RED on Raspberry Pi

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This post is an introductory guide to Node-RED. I’ll cover what’s Node-RED, how to install it, how to use the visual interface to create a simple flow.

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Electronics Basics – Types of Switches and How Switches Work

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Switches are very simple components essential in your electronics circuits. A switch can: act as an interrupter, interrupting the electric current. In the example in the figure below, the switch is either interrupting the current to flow and the LED doesn’t turn on, or it allows the electric flow and the LED turns on.

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Upgrade from Node-RED-Contrib-UI to Node-RED-Dashboard

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If you followed the Build a Home Automation System for $100 course prior to August 27 2016, you know that I’ve used Node-RED-Contrib-UI to build the user interface for the home automation system. But, sadly the guy that developed the Node-RED-Contrib-UI will no longer be able to update that package. Luckily, the Node-RED team announced that […]

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Exporting and Backing Up your Node-RED Nodes

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This post shows how to export your Node-RED Nodes. This is useful if you need to: Backup your Node-RED flow Move your flow to another Raspberry Pi (or machine) Share your Node-RED project with others Example Imagine that you had the following nodes in your flow: You would need to click the deploy button on the top-right corner to […]

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4 Hot Glue Tricks for Your Electronics Projects

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Hot glue is great. It is very handy for a wide variety of applications if you want make something stick together. Here’s 4 tricks about hot glue that may be useful in your electronics projects and beyond.

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$10 DIY WiFi RGB LED Mood Light with ESP8266 (Step by Step)

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In this project, I’ll show you how you can build your own mood light. You’ll use an ESP8266 to remotely control the color of your light using your smartphone or any other device that has a browser. This project is called $10 DIY WiFi RGB LED Mood Light.

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Electronics Basics – How a Potentiometer Works

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A potentiometer, also referred to as pot, may come in a wide variety of shapes and are used in many applications in your daily life, for example to control the audio volume of the radio. A pot is a manually adjustable variable resistor with three terminals.

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ESP8266 DS18B20 Temperature Sensor Web Server with Arduino IDE

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In this project you’ll create a standalone web server with an ESP8266 that displays the temperature with a DS18B20 temperature sensor. Recommended Resources:

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Guide for DS18B20 Temperature Sensor with Arduino

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In this guide I’ll show you how to read the temperature with the DS18B20 temperature sensor with the Arduino board. The DS18B20 Temperature Sensor The DS18B20 temperature sensor is a 1-wire digital temperature sensor. This means that you can read the temperature with a very simple circuit setup. It communicates on common bus, which means that you […]

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