• 7 Posts
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Joined 2 years ago
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Cake day: October 20th, 2024

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  • For a better seperarion. You examples (laptops consoles phones) all run DC, meaning they Need to turn AC to DC, needing a PCB who does it who not design it for world use? For fridges, washing machines, dryers, they run on AC, they are cheaper to make if they just don’t have a PCB and run straight on AC.

    Also note that EU kettles can run on USA network, they will just be horrible slow heaters (they are slower with about 230V/110V = ~2x)





  • This explanation is good indeed.

    Sometimes you design a circuit where the main chip runs on +3.3V reference to the chips ground at 0V, but somewhere in the proces you end up with an extension board that wants 5V below the ground. For easy of use we just call this -5V instead of renaming everything to 0, 5, and 8,3V. Renaming also has the drawback that I like to measure everything reffering to the ground of the main chip. So I personally just don’t rename and keep my reference there.

    *fixed 8.5 typo to 8.3