Arduino Nano thermometer takes room temperature – Electronics Weekly

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Arduino Nano thermometer takes room temperature

We seem to be having a lot of weather recently – I don’t know if you’ve noticed – so this feels quite timely.

Created by Mirko Pavleski, the “room comfort thermometer” uses LEDs to indicate its reading. To build it, the list of components include an Arduino Nano R3, an Adafruit Waterproof DS18B20 Digital temperature sensor, a push button switch (for changing operational modes) and, for the lights, a Digilent WS2812 Addressable LED Strip.

This Arduino-powered thermometer uses LEDs to indicate room temperature: https://t.co/4zYYxbmuio pic.twitter.com/kWnwNjFZPC

— Arduino (@arduino) April 27, 2021

Its measuring range is from 10 to 35 degrees Celsius and it has a resolution of 0.5 degrees. The temperature itself is displayed via the 50 diodes on the LED bar. Notably, in addition to the scale, you can clock the temperature through the color of the LED display (dark blue is low, red high). The three possible modes of operation are: dot, line, and test.

The project is featured on the Arduino Project Hub, where Mirko writes:

“By changing the temperature, the color of the diode gradually changes from dark blue at lower temperatures, so next light blue, through green shades at comfortable temperatures, to red levels at higher temperatures. So with just a glance at the thermometer we can conclude whether the temperature is in the comfort zone.”

“By pressing the button, the mode of operation switches to linear. In this mode, all diodes light up from the initial to the specific temperature. The next time you press the button, the device switches to TEST mode, and now all the diodes are switched on successively one by one to the maximum and then returned. To return to DOT mode, we need press the key again.”

Its fritzing schematic is below, and you can also find the Python code on the Arduino website.

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