This project creates a gesture-controlled light switch that turns lights on and off with a simple hand wave. Using a PIR sensor, the system detects motion and toggles a relay that controls the light. A short wave turns the light on, and another wave turns it off.<\/p>\n
Difficulty:<\/strong> Beginner A PIR sensor detects hand movement within a short range (10-30cm). Each time motion is detected, the Arduino toggles a relay that controls the light. A status LED indicates the current state, and debouncing prevents rapid toggling.<\/p>\n VCC<\/th>\n 5V<\/th>\n GND<\/th>\n GND<\/th>\n OUT<\/th>\n Digital Pin 2<\/th>\n IN<\/th>\n Digital Pin 3<\/th>\n Anode<\/th>\n Digital Pin 13 (via 220\u03a9)<\/th>\n<\/tbody>\n \u8868<\/p>\n This gesture-controlled light switch adds a touch of magic to any room, perfect for kitchens, workshops, or simply for the novelty of waving to control lights.<\/p>\n","protected":false},"excerpt":{"rendered":" Project Overview This project creates a gesture-controlled light switch that turns lights on and off with a simple hand wave. Using a PIR sensor, the system detects motion and toggles a relay that controls the light. A short wave turns the light on, and another wave turns it off. Difficulty: Beginner Estimated time: 1-2 hours […]<\/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-4132","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
\n
Circuit Diagram<\/h2>\n
Connection Table<\/h3>\n
\n\n
Component<\/th>\n Pin<\/th>\n Arduino Pin<\/th>\n<\/thead>\n \nPIR Sensor<\/th>\n PIR Sensor<\/th>\n PIR Sensor<\/th>\n Relay Module<\/th>\n Status LED<\/th>\n Arduino Code<\/h2>\n
\/\/ Gesture-Controlled Light Switch\nconst int pirPin = 2;\nconst int relayPin = 3;\nconst int ledPin = 13;\n\nbool lightState = false;\nunsigned long lastTriggerTime = 0;\nconst unsigned long debounceDelay = 1000;\n\nvoid setup() {\n Serial.begin(9600);\n \n pinMode(pirPin, INPUT);\n pinMode(relayPin, OUTPUT);\n pinMode(ledPin, OUTPUT);\n \n digitalWrite(relayPin, LOW);\n digitalWrite(ledPin, LOW);\n \n delay(30000);\n}\n\nvoid toggleLight() {\n lightState = !lightState;\n digitalWrite(relayPin, lightState ? HIGH : LOW);\n digitalWrite(ledPin, lightState ? HIGH : LOW);\n}\n\nvoid loop() {\n bool motion = digitalRead(pirPin) == HIGH;\n \n if (motion && (millis() - lastTriggerTime > debounceDelay)) {\n lastTriggerTime = millis();\n toggleLight();\n }\n \n delay(50);\n}\n<\/code><\/pre>\nEnhanced Version with LED Fade Effect<\/h2>\n
const int pirPin = 2;\nconst int relayPin = 3;\nconst int ledPin = 13;\n\nbool lightState = false;\nunsigned long lastTriggerTime = 0;\nconst unsigned long debounceDelay = 1000;\nunsigned long fadeStartTime = 0;\nbool fading = false;\n\nvoid fadeLED(int start, int end) {\n int duration = 500;\n unsigned long startTime = millis();\n while (millis() - startTime < duration) {\n int brightness = map(millis() - startTime, 0, duration, start, end);\n analogWrite(ledPin, brightness);\n delay(5);\n }\n analogWrite(ledPin, end);\n}\n\nvoid toggleLight() {\n lightState = !lightState;\n digitalWrite(relayPin, lightState ? HIGH : LOW);\n \n if (lightState) fadeLED(0, 255);\n else fadeLED(255, 0);\n}\n\nvoid setup() {\n pinMode(pirPin, INPUT);\n pinMode(relayPin, OUTPUT);\n pinMode(ledPin, OUTPUT);\n digitalWrite(relayPin, LOW);\n digitalWrite(ledPin, LOW);\n delay(30000);\n}\n\nvoid loop() {\n if (digitalRead(pirPin) == HIGH && (millis() - lastTriggerTime > debounceDelay)) {\n lastTriggerTime = millis();\n toggleLight();\n }\n delay(50);\n}\n<\/code><\/pre>\nInstallation Steps<\/h2>\n
\n
Project Extensions<\/h2>\n
\n
Conclusion<\/h2>\n