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  Pakistan Science Club   E-Learning   Online Store Creating a DIY PIR (Passive Infrared) motion sensor light can be a rewarding project. PIR sensors detect changes in infrared radiation, making them ideal for motion detection. Here's a step-by-step guide to help you build your own PIR motion sensor light: Materials Needed: PIR motion sensor module LED strip or LED bulb Transistor (NPN, e.g., BC547) Resistor (220-ohm) Diode (1N4007) Relay module (optional, for high-powered loads) Power supply (e.g., 12V) Breadboard and jumper wires Electrical tape Enclosure or housing for the components Steps: 1. Understand the Components: Get familiar with the components: PIR motion sensor (detects motion), LED (output), transistor (amplifies current), resistor (limits current), diode (protects the circuit), relay module (if using high-powered loads). 2. Setup the PIR Sensor: Connect the PIR sensor to the breadboard. It typically has three pins: VCC, GND, and OUT. Connect VCC to the posi...