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Cake day: June 12th, 2023

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  • brianorca@lemmy.worldtoLemmy Shitpost@lemmy.worldCords
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    2 months ago

    In AC, diodes work half the time, every 1/60 second. The “good” LEDs will have circuitry to fully rectify the AC into DC, drop the voltage properly, and smooth the peaks and valleys, so they will be continuously lit. So the cheap LED Christmas lights might have a slight flicker, and the good ones are steady. (Or get fancy with chasing colors, etc.)

    All of that happens inside each of the “bulb” enclosures, or sometimes in a box at one end, so it technically doesn’t matter which end they are getting electricity from, since the socket at the far end is still just connected in parallel to the plug at the near end. (Otherwise you wouldn’t be able to link them together.)

    It’s just a really bad dangerous idea to reverse them.


  • It would still work. But it is VERY dangerous. 1. The far end of the light string will now have exposed metal prongs that are energized at 120v, which can be fatal. 2. If the other end gets plugged into a socket, there is a 50% chance it will be a different circuit on a different phase, which can create a 240v direct short, across a wire that has no properly sized circuit breaker. 3. Using it to plug a generator into your house during a power outage can kill electrical workers trying to fix the outage if you fail to open your circuit breakers.










  • People do sometimes get electrocuted in fresh water, but only when a boat in a marina has shore power (120V) and a bad connection of the hot side into the water. This can only occur with shore power, because otherwise the circuit can’t leave to boat. It also doesn’t occur in salt water because salt conducts electricity better than the human body.

    An EV battery might have enough voltage, but the current would prefer to travel directly from - to + on the battery itself. You would have to literally get in the way of that for it to affect your body. Most situations where that could happen, such as touching the electrodes directly, would be almost as dangerous even when you are dry. And again, salt water would conduct it much better than your body, therefore bypassing you, as long as you don’t get in the way.







  • I agree, that’s how it should work. GitHub as a third party probably had better TOS than most, and would face more uproar if they changed it. But they are not a social media site.

    But for regular social media posting, Facebook, Twitter, etc, there is no fighting against their TOS other than abstinence. You can object in writing with one of those footers, but nobody in charge is going to read it or honor it. It will be shoveled into the AI along with everything else. Your only recourse will be an expensive legal fight, and it would be difficult to prove any particular post was in the AI or not. It’s unproven legal ground to say giving a post to an AI for training even qualifies as a “copy” under copyright, or what notification qualifies to exempt your content.