๐ ๏ธ MAKER GUIDEApr 06, 2026โขโฑ๏ธ 2 min readโข๐ณ๐ต Tested in Nepal
Smart Germicidal UVC Room Disinfection Chamber with Radar Safety Interlock
Disinfect medical tools, masks, and surgical rooms safely using germicidal UVC lamps with microwave Doppler radar auto-cutoff to prevent human eye exposure.
๐ ๏ธ BILL OF MATERIALS (BOM)
Required Hardware & Component Checklist
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Estimated Total (5/5 items):
NPRย 1,380
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NPRย 200
NPRย 750
NPRย 180
NPRย 50
NPRย 200
Smart Germicidal UVC Room Disinfection Chamber with Radar Safety Interlock
Direct exposure to germicidal 254nm UVC light causes severe eye cataracts and skin burns. This automated sterilization controller uses the RCWL-0516 Microwave Doppler Radar Sensor to instantly shut off the 5V 10A Relay Module if any human or pet approaches the room.
Hardware Bill of Materials (In Stock at Ghumti Pasal):
- Radar Sensor: RCWL-0516 Microwave Radar Body Induction Doppler Sensor Module
- Microcontroller: Arduino Nano V3.0 Solderless (Without Cable)
- High-Power Switch: 1 channel 5V 10A low level trigger Relay Module
- Warning Alarm: Active Buzzer (5V)
- Power Supply: 12v 1 Amp Power Adapter + HLK-PM01 AC-DC 220V to 5V Module
Circuit Pinout & Wiring Connections:
| Component / Sensor Pin | Arduino Nano Pin | Function / Description |
|---|---|---|
| RCWL-0516 VIN / GND | 5V / GND | Doppler Radar Power |
| RCWL-0516 OUT | Pin D2 (INT0) | Instant Safety Cutoff Motion Signal |
| 1-Channel Relay IN | Pin D7 | Low Active UVC Lamp Mains Contactor |
| Active Buzzer (+) | Pin D8 | Pre-Sterilization Evacuation Warning Siren |
| Cycle Start Button | Pin D3 (INPUT_PULLUP) | Arms 15-Minute UVC Clean Cycle |
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