Component
Coil
Wire wound in many loops that becomes a magnet while current flows through it.
Teardowns
Where you will find it
Gadgets & Electronics
How Wireless Earbuds Play Music Without Wires
Your phone turns a song into 2.4 GHz radio. A chip, a coil and a magnet in each bud turn it back into moving air. How wireless earbuds work.
Everyday Objects
How a Quartz Wall Clock Keeps Time
A quartz tuning fork shakes 32,768 times a second, a chip counts it down, and a tiny magnet flips once a second. How a battery wall clock keeps time.
Machines & Tools
How a Portable Generator Makes Electricity
A portable generator is an engine spinning a magnet inside coils of wire. See how it makes AC, why inverter models are quieter, and how to run one safely.
Teardowns in under a minute
All videos