๐ ๏ธ MAKER GUIDEJun 09, 2026โขโฑ๏ธ 1 min readโข๐ณ๐ต Tested in Nepal
Touchless Smart Waste Bin with Ultrasonic Proximity & SG90 Servo
Improve household hygiene with an automatic touch-free smart dustbin that lifts its lid when hands or trash approach within 20cm.
๐ ๏ธ BILL OF MATERIALS (BOM)
Required Hardware & Component Checklist
Curated components verified for this project. Check the items you need, adjust quantities, and add straight to cart:
Estimated Total (6/6 items):
NPRย 1,530
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All parts selected
NPRย 750
NPRย 250
NPRย 200
NPRย 40
NPRย 90
NPRย 200
Touchless Smart Waste Bin with Ultrasonic Proximity & SG90 Servo
When the HC-SR04 Ultrasonic Sensor detects a hand within 20cm, the SG90 Micro Servo smoothly opens the bin lid for 4 seconds before gently closing.
Hardware Bill of Materials:
- Microcontroller: Arduino Nano V3.0 Solderless
- Proximity Sensor: HC-SR04 ultrasonic sensor / ultrasonic range module
- Actuator: SG90 9g Micro Servo Motor 180 Degree
- Audio Feedback: Active Buzzer (5V)
- Battery Power: Type C TP4056 Charger + 18650 3.7V 3000mAh Battery
Circuit Pinout & Wiring Connections:
| Sensor / Actuator Pin | Arduino Nano Pin | Function / Description |
|---|---|---|
| HC-SR04 TRIG | Pin D9 | Ultrasonic Pulse Trigger |
| HC-SR04 ECHO | Pin D10 | Pulse Duration Distance Sensing |
| SG90 Servo PWM | Pin D6 | Lid Lifter Mechanism Control |
| Active Buzzer (+) | Pin D4 | Gentle Lid Motion Tone |
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