Linked by Thom Holwerda on Mon 21st May 2012 21:12 UTC
Hardware, Embedded Systems "Disassembling Apple's diminutive inch-cube iPhone charger reveals a technologically advanced flyback switching power supply that goes beyond the typical charger. It simply takes AC input (anything between 100 and 240 volts) and produce 5 watts of smooth 5 volt power, but the circuit to do this is surprisingly complex and innovative." Quite fascinating, although I'm not sure just how much the mentioned advantages really matter beyond bragging rights.
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RE: Meh
by Fergy on Tue 22nd May 2012 20:44 UTC in reply to "Meh"
Fergy
Member since:
2006-04-10

Call me crazy, but I liked the old power adapters based on a the transformer/diode bridge/filter combo, with a dissipative regulator if you really need a clean signal at the cost of some efficiency.

For some reason, PWM-based adapters tend to make painfully audible high-pitched sounds when they are plugged in, but do not deliver current. I have to admit that this reminds you to unplug them, though...

Call _me_ crazy but I would like them to shut off when there isn't something connected.

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