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Build your own Contact-less Thermometer Gun

Pandemics can be stressful, even in this day and age of cutting edge technology connecting people into a virtual world. I’ve heard people talk about how boring their self-quarantine is going (and even lockdown, in some places). If you’re one of them, I’d suggest you to play fold.it. Some little context on this game: It’ll help out scientists in figuring out a cure to COVID-19. Now, during these situations, the industry requires devices like thermometers, stethoscopes, etc., and if the disease is communicable, then their contact-less prototypes are preferred. So, presenting you with a tutorial on a contact-less thermometer gun!


Here are the materials that you’ll need:

  • Arduino Nano
  • Breadboard
  • 16×2 LCD
  • MLX90614 IR Temperature Sensor
  • 1000 Ohm resistor


  • Arduino Nano (+5V) to LCD (VDD) and MLX90614 (VCC)
  • Arduino Nano (GND) to LCD(VSS), MLX90614(GND) and LCD (V0) [through resistance (10k)]
  • Arduino (A4) to MLX90614 (SDA)
  • Arduino (A5) to MLX90614 (SCL)
  • Arduino (D2) to LCD (D7)
  • Arduino (D3) to LCD (D6)
  • Arduino (D4) to LCD (D5)
  • Arduino (D5) to LCD (D4)
  • Arduino (D11) to LCD (E)
  • Arduino (D12) to LCD (RS)
  • LCD (A) to Arduino (GND)
  • Arduino (GND) to LCD (K) and LCD (RW)

Follow up the connection scheme above and you’ll be good to go with the hardware portion! For the software portion, I’ve uploaded the whole code to github, which can be found here. It has been explained in the README file, but in case there are any doubts, feel free to ask them in the comments section!

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Happy tinkering!

  • As a Newbie, I am continuously browsing online for articles that can benefit me. Thank you!

  • Wow, incredible blog format! How lengthy have you ever been blogging for? you made running a blog look easy. The overall glance of your site is wonderful, as well as the content material!

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