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TUTORIALS

Activating an LCD screen using an RC522 RFID sensor

Introduction The following tutorial explores one way that we can interact with LCD screens with the help of an Arduino Uno board and RC522 RFID sensor. Nowadays, Liquid-crystal Display (LCD) screens are everywhere. Found attached to household items, like televisions and refrigerators, to lining streetscapes reporting advertisements and local news – these devices are commonplace […]

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TUTORIALS

Use a Grove Water Atomizer as a DIY Humidifier

BACKGROUND This tutorial will explain how to mist or humidify one’s surroundings as a response to an environmental trigger using the Arduino Uno in connection with Grove’s Water Atomizer. This tutorial is the fourth in the series of tutorials corresponding to the ‘Philly Air Mist’ project completed in the Sensing the City course taught by […]

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TUTORIALS

Monitoring Air Quality data with ThingSpeak using an ESP8266 module

Overview In this tutorial, we will show you how to connect an Arduino UNO R3 with an ESP8266 WiFi module mounted on an ESP-01 adapter. We will also explain the steps for setting up a new channel on ThingSpeak and how to write data on the channel. This tutorial is suitable for beginners who want […]

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TUTORIALS

Use Grove Inductive Sensors to Calculate the Number of Parking Spaces remaining

Overview This is an overview of the first tutorial for Smart Parking Philadelphia(SPP), detection using Grove inductive sensors. The project is about the data collection part of the smart parking project. In this project, we will use Grove inductive sensors to count the number of vehicles and calculate the number of parking spaces remaining, and […]

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TUTORIALS

Using a 4×4 Matrix Keypad to Input Gender and Age

Overview This tutorial aims to provide a step-by-step instruction to use a keypad with an Arduino Uno to input and interpret gender and sex. It utilizes a 4×4 matrix keypad and builds on Krishna Pattabiraman’s introductory code on CircuitBasics “HOW TO SET UP A KEYPAD ON AN ARDUINO” tutorial, as well as the CustomKeypad example […]

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TUTORIALS

How to Use an Infrared Break Beam Sensor to Trigger Sound

This tutorial will focus on how to use a break beam sensor to trigger sound from a passive buzzer. This is part of a larger project called Digital Playground that will use lights and sound to add an interactive digital layer to playgrounds for kids.  Parts List: Sensor Specifications: Infrared (IR) break-beam sensors are a […]

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TUTORIALS

Using Buzzer and Sensor to Warn Gas Leaking

Background A gas sensor is an apparatus that identifies the existence of various gases in the surrounding atmosphere. These sensors are utilized in a wide range of applications, including security systems in refineries, industrial facilities, and homes. They are capable of detecting combustible gases, toxic gases, pollutants, and more. As part of the pollution detection […]

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TUTORIALS

Using the MQ-2 Sensor for Smoke Level Detection

Introduction The MQ2 sensor is a commonly used gas sensor that can detect a variety of gases such as propane, methane, and carbon monoxide, as well as smoke. It works by measuring the change in resistance of its sensitive material when it comes into contact with the gas or smoke. This makes it a valuable […]

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TUTORIALS

Controlling water pump based on air temperature and humidity

Overview In this tutorial, we will be using an Arduino Uno microcontroller to control the activation and deactivation of a water pump via a relay module based on temperature and humidity readings from a DHT11 sensor. When the temperature and/or humidity exceed a certain threshold, the Arduino will activate the water pump to regulate the […]

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TUTORIALS

How to make an Infrared Thermometer with Arduino

Learn how to wire and code a basic DIY button-triggered thermometer that can measure and display temperature readings from an MLX90614 IR temperature sensor on an LCD screen To make the thermometer you will need to integrate 3 individual components, a button, IR temperature sensor, and an LCD display. First, you will set up a […]