No, PIR sensors cannot detect motion through walls. They are designed to detect motion within their line of sight and are affected by physical barriers like walls. Connect the PIR sensor's VCC (or +) ...

We have already used a PIR sensor for motion detection, it senses the change in ambient infrared energy caused when a warm body enters the monitored area. In this tutorial, we are going to interface .

2. Fig. 1: Author’s prototype Fig. 2: Block diagram of motion sensor alarm The circuit diagram of the motion sensor alarm is shown in Fig. 3. It consists of a PIR motion sensor (MS1), Arduino Nano ...