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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 positive rail,

  Creating a DIY mini auto night lamp with a dark sensor can be a fun and practical project. Here's a simple step-by-step guide to help you build your own: Pakistan Science Club   E-Learning   Online Store Materials Needed: Light-emitting diode (LED) Dark sensor module Resistor (220-ohm) Transistor (NPN, e.g., BC547) LDR (Light-Dependent Resistor) Battery (9V) Breadboard and jumper wires Electrical tape Small project box (optional) Steps: 1. Understand the Components: Familiarize yourself with the components and their functions: LED (output), dark sensor module (detects ambient light), resistor (limits current), transistor (amplifies current), LDR (resistance changes with light). 2. Setup the Dark Sensor Module: Connect the dark sensor module to the breadboard. It typically has three pins: VCC, GND, and OUT. Connect VCC to the positive rail, GND to the negative rail, and OUT to a free row. 3. Connect the Transistor: Connect the transistor (e.g., BC547) to the breadboard. Connect th