Stanford postdoctoral fellow Heidi Arjes has created a “resistor hat” to celebrate Earth Day in this year’s San Francisco March for Science.

A balanced quantum Hall resistor. Nature Electronics, 2024; DOI: 10.1038/s41928-024-01156-6 ...

The beanies have a very geeky "resistor" design. They symbolically feature a battery, three resistors in a series, and a closed circuit made with white yarn. Resistors are used in electronics "to ...