// FREE MINI-COURSE · ◉
Everyday Tech
The Hidden Electronics You Use Every Day — Mind-blowing electronics inside the things you touch daily: mouse, touchscreen, charger, Wi-Fi and more.
3 of 4 lessons out · next: Wireless charging: two coils, no wire
▶ Start lesson 1- 01
Your mouse is a cameraKnow that an optical mouse photographs the desk up to 12,000 times a second and compares photos to track movement (and why it fails on glass).
EP.30 · 20 s - 02
How your touchscreen feels your fingerUnderstand how a grid of transparent electrodes senses the tiny charge your finger pulls (capacitive touch).
EP.43 · 24 s - 03
Why your phone charger got so smallSee how switch-mode chargers (and GaN) shrink a big 50 Hz transformer into a tiny fast one.
EP.49 · 24 s - 04 COMING NEXTWireless charging: two coils, no wireHow a changing magnetic field from the pad's coil induces current in the phone's coil (Qi), and why alignment matters.
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