1
Smart Rainwater Harvesting SystemWater level sensor, mini pump, Arduino/ESP. Controls pump & alerts overflow.
2
Automatic Plant WateringSoil moisture sensor, relay, water pump, Arduino. Waters only when needed.
3
Solar-Powered Mobile Charging6V/12V solar panel, battery, USB charger. Portable renewable charger.
4
Plastic Waste Segregation RobotIR sensor, DC motors, Arduino, conveyor. Detects & separates waste.
5
Air Quality Monitoring DeviceMQ135 sensor, LCD, Arduino/ESP. Shows AQI & alerts via buzzer.
6
Solar-Powered Street LightLDR, LED, solar panel, battery. Auto ON at night, OFF in day.
7
Wind Energy Phone ChargerSmall DC motor, rectifier, battery, USB charger. Generates power from wind.
8
Smart Compost BinTemp & humidity sensors, Arduino. Monitors composting process.
9
River/Lake Water Quality CheckerTDS & pH sensors, Arduino/ESP. Measures pollution level.
10
Mini Solar Water HeaterCopper pipe, black paint, glass sheet, solar pump. Heats water for domestic use.
11
Solar-Powered Irrigation SystemSolar panel, water pump, moisture sensor. Automatic farm irrigation.
12
Smart Energy MeterCurrent sensor, Arduino/ESP, LCD. Monitors energy use & alerts.
13
Eco-Friendly Cooling FanSolar panel, DC fan, battery. Portable solar cooling fan.
14
Biogas Leakage DetectorMQ sensor, buzzer, Arduino. Alerts on gas leakage.
15
Portable Solar LanternLED light, solar panel, battery. Renewable emergency light.
16
Automatic Window VentilationTemp sensor, servo, Arduino. Adjusts window based on temperature.
17
Water Level & Overflow AlarmUltrasonic sensor, buzzer, Arduino. Alerts before overflow.
18
Smart Dustbin with Waste Level IndicatorUltrasonic sensor, Arduino, LED. Alerts when bin is full.
19
Mini Hydro Power GeneratorWater turbine, DC motor, rectifier. Generates electricity from water flow.
20
Solar Food DehydratorWooden box, glass sheet, black paint. Naturally dries food using solar heat.