Temperature and Humidity Sensor DHT11 with arduino Tutorial – Make OLED Termometer

DHT11 with OLED display (DIY thermometer)

DHT11 is cheapest temperature and humidity sensor compare to another sensor. It has 3 pins that we can easily interface with arduino. It uses single-bus operation. DHT11 Specification PCB size 22.0mm X 20.5mm X 1.6mm Working voltage 3.3 or 5V DC Operating voltage 3.3 or 5V DC Measurement range 20-95%RH;0-50℃ Resolution 8bit(temperature),8bit(humidity) Compatible interfaces 2.54 …

How to use relay with arduino

Relay is switch that can be controlled with electronics controller such as microcontroller or arduino. so if you want to connect or disconnect a circuit you can simply use relay. There are so many types of relay in market. But in this tutorial we will learn how to use SPDT relay, which is enough for …