Arduino Interfacing with PIR Motion Sensor

Pir Sensor is most common to detect motion of Passive Infrared radiations that are emitted by Humans/Living things. These radiations are invisible to the human eye but are not to Fresnel lens which enhances the radiations onto PIR detector. The IR sensor itself is housed in a hermetically sealed metal can to improve noise/temperature/humidity immunity. There is a window made of an IR-transmissive material (typically coated silicon since that is very easy to come by) that protects the sensing element. Behind the window are the two balanced sensors. As shown below: PIR sensor itself creates a small millivolt when...

Interface Arduino with Ethernet Shield & Display Temperature using LM35 on Web Browser

Previously we have introduced on how to interface LM35 using Arduino Mega 2560. In this article, we will show you how to interface Ethernet Shield with Arduino 2560 and display temperature data using LM35 on your Web Browser. See How to Interface LM35 using Arduino Mega 2560 To implement this project you need the following things: Arduino Board (any board will do the trick, but we recommend buying Mega2560 as we will be using this board for more projects) More details can be found here: Arduino Boards Ethernet Shield for Arduino. More details can be found here: Arduino Ethernet...