This Arduino Uno-powered project is designed to automatically ... The project is equipped with a DHT11 sensor to read the room's temperature and an LCD to display this temperature reading and ...

He decided to take an in-depth look at the DHT11 sensor; which you can get your hands on for under $3 if you know where to look. The four-pin device uses a 1-wire protocol. [Rajendra] discusses ...

Here is the diagram of my Arduino infrared close proximity sensor. As you can see, the core part of my experimental setup is an Arduino UNO, but other compatible microcontrollers can also be employed.