This project converts a standard sink faucet into a touchless automatic faucet. When you place your hands under the faucet, a PIR sensor detects motion and opens a solenoid valve, allowing water to flow. When you remove your hands, the water stops after a short delay.<\/p>\n
Difficulty:<\/strong> Intermediate A PIR sensor is positioned under the faucet spout, facing down toward the sink. When hands enter the detection zone, the sensor triggers an Arduino which activates a solenoid valve connected to the water line. The valve opens, water flows, and when hands are removed, the valve closes after a brief delay.<\/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 Positive<\/th>\n Relay COM (power supply +)<\/th>\n Negative<\/th>\n Relay NO (to power supply -)<\/th>\n<\/tbody>\n \u8868<\/p>\n This touchless faucet project adds convenience and improves hygiene in your kitchen or bathroom. With proper installation, it provides years of reliable hands-free operation.<\/p>\n","protected":false},"excerpt":{"rendered":" Project Overview This project converts a standard sink faucet into a touchless automatic faucet. When you place your hands under the faucet, a PIR sensor detects motion and opens a solenoid valve, allowing water to flow. When you remove your hands, the water stops after a short delay. Difficulty: Intermediate Estimated time: 3-4 hours Estimated […]<\/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-4127","post","type-post","status-publish","format-standard","hentry","category-projects"],"blocksy_meta":[],"yoast_head":"\r\n
\nEstimated time:<\/strong> 3-4 hours
\nEstimated cost:<\/strong> $40-60<\/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 \nPIR Sensor<\/th>\n PIR Sensor<\/th>\n PIR Sensor<\/th>\n Relay Module<\/th>\n Solenoid Valve<\/th>\n Solenoid Valve<\/th>\n Plumbing Installation<\/h2>\n
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Arduino Code<\/h2>\n
\/\/ Automatic Faucet with PIR Sensor\nconst int pirPin = 2;\nconst int valvePin = 3;\n\nunsigned long lastTriggerTime = 0;\nconst unsigned long waterDuration = 3000;\nconst unsigned long minInterval = 1000;\n\nbool waterOn = false;\nbool motionDetected = false;\n\nvoid setup() {\n Serial.begin(9600);\n pinMode(pirPin, INPUT);\n pinMode(valvePin, OUTPUT);\n digitalWrite(valvePin, LOW);\n \n delay(60000);\n}\n\nvoid turnWaterOn() {\n digitalWrite(valvePin, HIGH);\n waterOn = true;\n}\n\nvoid turnWaterOff() {\n digitalWrite(valvePin, LOW);\n waterOn = false;\n}\n\nvoid loop() {\n bool motion = digitalRead(pirPin) == HIGH;\n \n if (motion && !motionDetected) {\n motionDetected = true;\n lastTriggerTime = millis();\n if (!waterOn) turnWaterOn();\n }\n \n if (!motion && motionDetected) {\n motionDetected = false;\n lastTriggerTime = millis();\n }\n \n if (waterOn && !motionDetected && (millis() - lastTriggerTime > waterDuration)) {\n turnWaterOff();\n }\n \n if (waterOn && (millis() - lastTriggerTime > 30000)) {\n turnWaterOff();\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