Random Nerd Tutorials
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How to Flash a Custom Firmware to Sonoff

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In this post, you’re going to learn how to flash custom firmware to the Sonoff device. I recommend that you read my previous post to get familiar with the Sonoff.

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Guide for the Tilt Sensor (inclinometer) with Arduino

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This post shows how to use the tilt sensor module with the Arduino. The tilt sensor is many times referred to as inclinometer, tilt switch or rolling ball sensor. Using a tilt sensor is a simple way to detect orientation or inclination.

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Guide for Microphone Sound Sensor with Arduino

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This post shows how to use the microphone sound sensor with the Arduino board.

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Sonoff – $5 WiFi Wireless Smart Switch Introduction

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In this post, you’re going to learn how to control an outlet from anywhere in the world using the Sonoff device. The Sonoff is a device that you put in series with your power lines allowing you to turn any device on and off.

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9 Arduino Compatible Temperature Sensors for Your Electronics Projects

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Reading the temperature with the Arduino is a very useful task. It is commonly used in a weather station project or in a home thermostat, for example. There are several ways of measuring the temperature.

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Guide for BMP180 Barometric Sensor with Arduino

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This post is about how to use the BMP180 barometric sensor with the Arduino. It is also applicable for other similar barometric sensors.

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Guide for Real Time Clock (RTC) Module with Arduino (DS1307 and DS3231)

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This post is about how to use the DS1307 Real Time Clock (RTC) module with the Arduino. You can also follow this guide for other similar modules like the DS3231 RTC.

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ESP8266 0.96 inch OLED Display with Arduino IDE

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This post shows how to use the 0.96 inch OLED display with the ESP8266 using the Arduino IDE.

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Guide for 0.96 inch OLED Display with Arduino

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This post shows how to use the small 0.96 inch OLED display with the Arduino board.

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Guide for WS2812B Addressable RGB LED Strip with Arduino

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This post is about the WS2812B LED strip, which is an addressable RGB LED strip. The information in this post also works with other similar LED strips, such as strips of the WS28XX family, Neopixel strip and others.

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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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