Week 4 Posting - PSU

 While writing my forum for this week, I had the chance to search and learn more about power supplies for a computer. The PSU transforms the AC (alternating current) from an electrical outlet into a stable low-voltage DC (direct current) usable by the computer. It powers parts, including the motherboard, processor, and other hardware components. There are a few cool facts about PSU. For example, Apple II (1977) presented the switched-mode power supply, which was lighter, smaller, and fanless. Before Apple invented a lighter, smaller, and fanless PSU, computers had heavy transformers and linear power supplies. 

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