• 🇰 🌀 🇱 🌀 🇳 🇦 🇸 🇰 🇦 🇵 🇮@lemmy.world
    18·
    vor 1 Stunde

    No problem. The same people arrive from even later in the future with enough built-in power for both machines and rescue themselves. Everyone returns to their own times. When they arrive back in the earlier time, now they know they have to build another machine with spare power to go rescue themselves.

    • 9point6@lemmy.world
      8·
      vor 3 Stunden

      Assuming Dr. Stone is some kind of MacGyver regen:

      Two obvious approaches to me that I’ll run through in high level: build a wind/watermill generators or potato/lemon batteries

      First thing you’ll need to figure out for both is how to make some wire. That’s going to require finding some metal ore and a hot furnace, and creating a few tools out of stone to work with it.

      The biggest difficulty with the former two is going to be finding some ferrous metal to turn into magnets. You can make a magnet without electricity by smashing the shit out of some iron as it’s aligned with the earth’s magnetic field, and it’ll become a weak magnet. From there with enough wire, you can build a generator. With the sails of the mill, you can build that out of wood and foliage.

      For potato or lemon batteries, you’re going to need a shitload, as they give you about a volt and a pretty tiny current, but theoretically you could figure something out that way with enough. I imagine some things may want to eat your batteries though

    • GreenKnight23@lemmy.world
      2·
      vor 2 Stunden

      there was an episode where they created a dynamo generator and batteries.

      1000004273

      that took them something like six months with many people helping.

      unfortunately dynamos(like above) and batteries work on DC current. that time machine works on AC.

      so you would need to do two things.

      1. create a mechanical DC>AC inverter that preferably is powered from the physical input of the dynamo
      2. create batteries in both series and parallel to ensure a 120v voltage is maintained at the required amperage.

      also consider that north American standards require electricity to run at 60hz. this means the AC signal flips the DC signal 60 times per second. creating a mechanical inverter would need to take into account the size of the circle for a complete rotation in 1 second as well as the speed at which the dynamo must spin in order to get 60 alterations per second. the rough formula would look something like: frequency = speed/(diameter*3.14). speed can be variable depending on the size of the copper wheel used as well.

      to sum everything up, for just the two people there, it’s probably going to take them too long and they’ll die from exposure or predators.

      get excited

        • GreenKnight23@lemmy.world
          1·
          vor 56 Minuten

          they probably needed to add more magnets, but that would have made it more difficult to spin. not only, the faster you spin it the more charged the plate becomes and more resistance you’ll feel.

        • jaybone@lemmy.zipEnglish
          18·
          vor 3 Stunden

          “Will it change the path of an asteroid?”

          “Well, probably not.”

          Chomp

          • 🍉 DrRedOctopus 🐙🍉@lemmy.world
            1·
            vor 2 Stunden

            maybe?

            After learning of new technology and a warning, they developed a space program.

            The present is no longer a primate civilizations fighting each other and destroying the planet, instead a saurian civilisation has spread through the galaxy.

            • Smaile@lemmy.ca
              1·
              vor 25 Minuten

              That’s not how the butterfly effect works. Also no shot these 2 dunderhead could make that work.

    • atomicbocks@sh.itjust.worksEnglish
      2·
      vor 2 Stunden

      That’s going to depend entirely on how good you are at finding and smelting copper with only Stone Age technologies.

      • 🍉 DrRedOctopus 🐙🍉@lemmy.world
        3·
        vor 2 Stunden

        my favourite trope in media, The season long enemy becomes a close ally at the end. And the hero just accumulates friends as if they were Pokémon.

        MLP, Dr Stone, Dragon Ball.

        need more of that.

  • SuperApples@lemmy.world
    3·
    vor 3 Stunden

    Just need to find Benjamin Franklin to charge your patented Super Battery, and wash your carriage to ensure precipitation!

    • brsrklf@jlai.lu
      1·
      vor 15 Minuten

      Just checked on wikipedia… Origin of the solanaceae family is thought to be around 80 million years ago.

      Stegosaurus went extinct around 145 million years ago.

      They’ll be waiting for their potatoes a long time .