What’s better than a regular scarf? Probably one that can display the temperature. This NeoPixel Thermometer Scarf lets you know how cold it is, taking the guesswork out of the process. You are going to need a DHT11 humidity and temperature sensor module, an Arduino board, and a few other parts to get started.
caitlinsdad has shared the instructions for this project here. What do you think? How would you improve upon this idea?