๐ ๏ธ MAKER GUIDEApr 20, 2026โขโฑ๏ธ 1 min readโข๐ณ๐ต Tested in Nepal
Automatic Rain-Sensing Clothesline Retractor with Motor Driver
Protect drying laundry from sudden Kathmandu monsoon downpours with a sensitive raindrop sensor board and automatic motorized rope retractor.
๐ ๏ธ BILL OF MATERIALS (BOM)
Required Hardware & Component Checklist
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Estimated Total (4/4 items):
NPRย 1,480
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NPRย 750
NPRย 350
NPRย 200
Automatic Rain-Sensing Clothesline Retractor with Motor Driver
The Raindrop / Rain Water Level Sensor Module detects the first raindrops of monsoon showers, triggering a TB6612FNG Motor Driver on an Arduino Nano to reel clothes under shelter.
Hardware Bill of Materials:
- Rain Sensor: Raindrop / Rain Water Level Sensor Detection Module LM393
- Microcontroller: Arduino Nano V3.0 Solderless
- Motor Driver: Dual Motor Driver 1A TB6612FNG for Microcontroller
- Power Supply: 12v 1 Amp Power Adapter
Circuit Pinout & Wiring Connections:
| Sensor / Module Pin | Arduino Nano Pin | Function / Description |
|---|---|---|
| Rain Sensor VCC / GND | 5V / GND | Raindrop Board Comparator Power |
| Rain Sensor Digital OUT (DO) | Pin D2 (INT0) | Rain Precipitation Detected Trigger |
| TB6612FNG PWMA | Pin D5 (PWM) | Clothesline Reel Motor Speed |
| TB6612FNG AIN1 / AIN2 | Pin D7 / Pin D8 | Clothesline Retract / Extend Direction |
| TB6612FNG STBY | Pin D9 (HIGH) | Driver Enable |
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