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Home » Gabriel’s Blog

Talking About Power Supplies...
Author: Gabriel TorresDate: May 22, 2006 - 7:08 AM PST

Look what I found here in my junk closet: an Apple II power supply. For its time (1977) it was a breakthrough, since until then switching mode power supplies weren’t used. Designed by Rod Holt, it doesn’t differ a lot from power supplies used on current-day PCs, as we’ve seen on our Anatomy of Switching Power Supplies tutorial. We disassembled it to show you how it worked.

Apple II Power Supply
click to enlarge
Figure 1: Apple II power supply.

Apple II Power Supply
click to enlarge
Figure 2: Apple II power supply.

Apple II Power Supply
click to enlarge
Figure 3: Inside the Apple II power supply.

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