Tiny, cheap, and dangerous: Inside an iPhone charger. Ken writes -
I opened up a cheap phone charger and examine how the circuit works. In the process, I find that the manufacturer cut a lot of safety corners, and it’s nowhere near US safety standards. There’s a reason that name-brand chargers cost a bit more.
Since you reverse-engineered the protocol for Apple chargers, you will probably be interested in reference #15 from my article… which documents the resistances used by Sony and Apple chargers – their values are
very close to the ones you found.
Have an amazing project to share? Join the SHOW-AND-TELL every Wednesday night at 7:30pm ET on Google+ Hangouts.
Join us every Wednesday night at 8pm ET for Ask an Engineer!
Learn resistor values with Mho’s Resistance or get the best electronics calculator for engineers “Circuit Playground” – Adafruit’s Apps!
No comments yet.
Sorry, the comment form is closed at this time.