this post was submitted on 13 Jul 2025
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Showerthoughts

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A "Showerthought" is a simple term used to describe the thoughts that pop into your head while you're doing everyday things like taking a shower, driving, or just daydreaming. The most popular seem to be lighthearted clever little truths, hidden in daily life.

Here are some examples to inspire your own showerthoughts:

Rules

  1. All posts must be showerthoughts
  2. The entire showerthought must be in the title
  3. No politics
    • If your topic is in a grey area, please phrase it to emphasize the fascinating aspects, not the dramatic aspects. You can do this by avoiding overly politicized terms such as "capitalism" and "communism". If you must make comparisons, you can say something is different without saying something is better/worse.
    • A good place for politics is c/politicaldiscussion
  4. Posts must be original/unique
  5. Adhere to Lemmy's Code of Conduct and the TOS

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[–] piecat@lemmy.world 3 points 1 day ago (1 children)

Pin pitch means how tiny the physical pins in the connector can be spaced apart.

IR drop losses happen because a wire has resistance, it isn't a perfect conductor. 28AWG wire has about 0.22ohm/m. Given a 2 meter cable, you might expect to see 0.44ohm one-way. Current is also travelling back, so the circuit "sees" another 0.44ohm. That's a total of 0.88ohm

A wire will cause voltage drop following ohm's law. V=I/*R. So for 1A of current, you will see 0.88V lost.

Say you're trying to charge at 15W (5V 3A), your phone is only going to 'see' 2.36 volts, and 7.9W are wasted in the cable.

For a 100W device (20V, 5A), 4.4V are lost, also meaning 22W are wasted.

[–] remotelove@lemmy.ca 1 points 1 day ago

(For others reading this, this is a perfect followup to my comment here explaining the "why", while this is an excellent view into the "how" and picks up the bits I dropped about Ohms Law.)