DIY Infrared Thermometer

There is an inexpensive device MLX90614 (Datasheet PDF) – Infra Red Thermometer in TO-39. It’s intended to measure the temperature ranging from -20°C to +120°C. Measurement accuracy is ~ 0.5°C. Bus connection: SMBus. Price sensor on AliExpress or other online stores is $ 15-20.

DIY Infrared Thermometer

Connection to Arduino is very simple:

Connection to Arduino

 

The guys from bildr written library to connect to the Arduino, for which they thank you.

Me it was just assembled a small device in the housing with the information output on the LCD-display from Nokia 5110.

arduino8-2

Wires of MLX90614 sensor and pull-up resistors 4k7 were neatly packed in shrink tube.

arduino8-3

Arduino board was powered by two Li-Ion battery 3.7V. The sensor MLX90614 and LCD are powered by 3.3V, which is taken from the board Arduino.

Nokia 5110 is connected as follows:
– Pin 7 – Serial clock out (SCLK)
– Pin 6 – Serial data out (DIN)
– Pin 5 – Data / Command select (D / C)
– Pin 4 – LCD chip select (CS)
– Pin 3 – LCD reset (RST)

When you connect the display to the other pins, you need to change the pin numbers in the initialization function LCD.

arduino8-4

Was added to the power switch and all was staffed in the case.

Project on GitHub

Leave a Reply

Your email address will not be published. Required fields are marked *