Everyone knows how to convert from Celsius to Fahrenheit, right ... analog input on an Arduino and take care of conversions in code. But it’s nice to know how to do it old school, too, and ...

But Celsius temperatures are trickier ... 40 degrees Celsius is 104 degrees Fahrenheit (stay inside and crank up the A/C) You can even use this conversion both ways, if you remember which one ...

If you live in one of the few countries that use the Fahrenheit temperature scale (that would be the United States, the Bahamas, the Cayman Islands, Liberia, Palau, the Federated States of ...