Category Archives: Sensors

Using a TCRT5000 sensor with your Arduino

You need to know if an object is close to another one but without using a contact switch? The TCRT5000 sensor is a great and cheap option for that! It essentially consists into 2 parts bundled together: an infrared emitter and a photo-transistor.   Drawing 1: No object close to sensor Drawing 2: An object is close to the sensor,… Read more »

IoT Object : ESP8266 + DHT-11 on ThingSpeak.com

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There’s a lot of buzz around the Internet of Things (IoT) these days. This post explains how to create your own IoT object that will read your house air temperature and humidity and send that information to a web site called ThingSpeak.com. Once your data is on ThingSpeak, you’ll be able to visualize it to see how the your house… Read more »