🛠️ MAKER GUIDEMay 26, 2026•⏱️ 1 min read•🇳🇵 Tested in Nepal
Medical-Grade Contactless Infrared Thermometer with MLX90614 & OLED
Build an instant non-contact digital body and surface thermometer using the MLX90614 infrared sensor, Arduino Nano, and a crisp 0.91" OLED display.
🛠️ BILL OF MATERIALS (BOM)
Required Hardware & Component Checklist
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Estimated Total (6/6 items):
NPR 2,930
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NPR 1,350
NPR 750
NPR 500
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Medical-Grade Contactless Infrared Thermometer with MLX90614 & OLED
The MLX90614 Non-Contact Infrared Temperature Sensor Module measures infrared radiation emitted by objects, calculating surface and body temperature with medical ±0.5°C accuracy over I2C to an Arduino Nano and 0.91" OLED.
Hardware Bill of Materials:
- Infrared Sensor: MLX90614 Non-Contact Infrared Temperature Sensor Module I2C
- Microcontroller: Arduino Nano V3.0 Solderless
- Display: 0.91 inch OLED module blue OLED 128X32 GND-VCC-SCL-SDA
- Alarm & Power: Active Buzzer + Type C TP4056 Charger + 18650 3.7V 3000mAh Battery
Circuit Pinout & Wiring Connections:
| Component / Sensor Pin | Arduino Nano Pin | Function / Description |
|---|---|---|
| MLX90614 VCC / GND | 3.3V / GND | Non-Contact Sensor Logic Power |
| MLX90614 SDA | Pin A4 | I2C Temperature Data |
| MLX90614 SCL | Pin A5 | I2C Clock Line |
| 0.91" OLED SDA / SCL | Pin A4 / Pin A5 | Shared I2C Screen Bus |
| Active Buzzer (+) | Pin D4 | Fever Threshold (>37.5°C) Audible Alert |
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