Freddie factors to the present temperature on the Mercury Thermometer

Almost everyone seems to be aware of the mercury thermometer and the way it makes use of the growth of the ingredient to show ambient temperatures. However in Instructables member TurboSnail’s newest mission, they tried to show this idea on its head by making a thermometer that makes use of the long-lasting Freddie Mercury to point out the temperature with out the necessity for the poisonous liquid steel.

The plan for this mission concerned a fairly easy circuit. An Arduino Nano Each would learn the present temperature and humidity ranges utilizing an Adafruit AHT20 sensor module and map them to Freddie’s arms and a set of LEDs, respectively. To assist scale back present consumption on this battery-powered show, the servo motor solely receives energy when a transistor is switched on by the microcontroller for transient durations of time.

After assembling the circuit and getting the code to work, TurboSnail then moved their consideration to designing a cool-looking PCB that options the dial face full with temperatures and sayings, a smaller humidity scale on the backside, and a big silkscreen determine of Freddie together with pads on the again for soldering the bigger elements. Freddie’s arm was 3D-printed and hooked up to the micro servo motor whereas the Nano Each was changed by a lower-power DIY Uno board. Final of all, the PCB was fitted within a customized wood enclosure and switched on.

To see extra in regards to the Mercury Thermometer, you may learn TurboSnail’s write-up right here on Instructables or watch the demo video beneath!