This project creates a smart closet light that automatically turns on when you open the closet door. A PIR sensor detects motion inside the closet, and an LED strip illuminates the space. The light turns off after a set period of no motion.<\/p>\n
Difficulty:<\/strong> Beginner A PIR sensor mounted inside the closet detects motion when you open the door. When motion is detected, an LED strip turns on. After a set period of no motion (e.g., 30 seconds), the lights turn off automatically. An optional door contact sensor can also trigger the light when the door opens.<\/p>\n VCC<\/th>\n 5V<\/th>\n GND<\/th>\n GND<\/th>\n OUT<\/th>\n Digital Pin 2<\/th>\n VCC<\/th>\n 5V<\/th>\n GND<\/th>\n MOSFET Drain<\/th>\n Gate<\/th>\n Digital Pin 3<\/th>\n Source<\/th>\n GND<\/th>\n One side<\/th>\n Digital Pin 4<\/th>\n Other side<\/th>\n GND<\/th>\n<\/tbody>\n \u8868<\/p>\n This smart closet light eliminates the need to fumble for a switch in the dark.<\/p>\n","protected":false},"excerpt":{"rendered":" Project Overview This project creates a smart closet light that automatically turns on when you open the closet door. A PIR sensor detects motion inside the closet, and an LED strip illuminates the space. The light turns off after a set period of no motion. Difficulty: Beginner Estimated time: 1-2 hours Estimated cost: $15-25 How […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[9],"tags":[],"class_list":["post-4712","post","type-post","status-publish","format-standard","hentry","category-projects"],"blocksy_meta":[],"yoast_head":"\r\n
\nEstimated time:<\/strong> 1-2 hours
\nEstimated cost:<\/strong> $15-25<\/p>\nHow It Works<\/h2>\n
Materials Needed<\/h2>\n
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Circuit Diagram<\/h2>\n
Connection Table<\/h3>\n
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Component<\/th>\n Pin<\/th>\n Arduino Pin<\/th>\n<\/thead>\n \nAM312 PIR<\/th>\n AM312 PIR<\/th>\n AM312 PIR<\/th>\n LED Strip (5V)<\/th>\n LED Strip<\/th>\n MOSFET<\/th>\n MOSFET<\/th>\n Reed Switch (optional)<\/th>\n Reed Switch<\/th>\n Arduino Code<\/h2>\n
\/\/ Smart Closet Light with PIR Sensor\nconst int pirPin = 2;\nconst int ledPin = 3;\nconst int doorSensorPin = 4; \/\/ optional\n\nunsigned long lastMotionTime = 0;\nconst unsigned long lightTimeout = 30000;\nbool lightsOn = false;\n\nvoid setup() {\n pinMode(pirPin, INPUT);\n pinMode(ledPin, OUTPUT);\n pinMode(doorSensorPin, INPUT_PULLUP);\n \n digitalWrite(ledPin, LOW);\n \n delay(30000);\n}\n\nvoid turnLightsOn() {\n digitalWrite(ledPin, HIGH);\n lightsOn = true;\n lastMotionTime = millis();\n}\n\nvoid turnLightsOff() {\n digitalWrite(ledPin, LOW);\n lightsOn = false;\n}\n\nvoid loop() {\n bool motion = digitalRead(pirPin) == HIGH;\n bool doorOpen = digitalRead(doorSensorPin) == LOW;\n \n if (motion || doorOpen) {\n if (!lightsOn) {\n turnLightsOn();\n } else {\n lastMotionTime = millis();\n }\n }\n \n if (lightsOn && (millis() - lastMotionTime > lightTimeout)) {\n turnLightsOff();\n }\n \n delay(100);\n}\n<\/code><\/pre>\nInstallation Steps<\/h2>\n
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Project Extensions<\/h2>\n
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Conclusion<\/h2>\n