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On January 10 2017 20:54 Morfildur wrote:
I'm wondering, semirelatedly,...
If you'd accidentally time travelled too far back, let's say year 1000 in central Europe, and you'd get stuck there, unprepared, with just your smartphone and a charger cable (because you thought you'd travel to somewhere with electricity), what would be the best way to charge your phone so you can keep playing sudoku or watch porn or whatever?
Interesting to learn that you either keep porn to watch offline on your phone or think that internet predates electricity 
However generating stable charging voltage in pre-technological society would be pretty challenging. Your best bet would probably be some kind of chemical battery, but you'd have to know in advance, what actually works, as you would have no internet
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On January 10 2017 20:56 opisska wrote:Show nested quote +On January 10 2017 20:54 Morfildur wrote:
I'm wondering, semirelatedly,...
If you'd accidentally time travelled too far back, let's say year 1000 in central Europe, and you'd get stuck there, unprepared, with just your smartphone and a charger cable (because you thought you'd travel to somewhere with electricity), what would be the best way to charge your phone so you can keep playing sudoku or watch porn or whatever? Interesting to learn that you either keep porn to watch offline on your phone or think that internet predates electricity However generating stable charging voltage in pre-technological society would be pretty challenging. Your best bet would probably be some kind of chemical battery, but you'd have to know in advance, what actually works, as you would have no internet
Even if you remember which metals go into the potatoes, you'd have a ahrd time finding the metals I think. Finding a potato should be easy.
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On January 10 2017 21:20 Cascade wrote:Show nested quote +On January 10 2017 20:56 opisska wrote:On January 10 2017 20:54 Morfildur wrote:
I'm wondering, semirelatedly,...
If you'd accidentally time travelled too far back, let's say year 1000 in central Europe, and you'd get stuck there, unprepared, with just your smartphone and a charger cable (because you thought you'd travel to somewhere with electricity), what would be the best way to charge your phone so you can keep playing sudoku or watch porn or whatever? Interesting to learn that you either keep porn to watch offline on your phone or think that internet predates electricity However generating stable charging voltage in pre-technological society would be pretty challenging. Your best bet would probably be some kind of chemical battery, but you'd have to know in advance, what actually works, as you would have no internet Even if you remember which metals go into the potatoes, you'd have a ahrd time finding the metals I think. Finding a potato should be easy.
By the powers of google, it seems like zinc-copper-vinegar is a popular home-physics excercise. Copper would be ubiquitous in middle ages, but pure zinc seem to have been invented only in the 18th century - as an allowy with copper, it's bronze, and thus known for millenia and wikipedia says that some 85%-purity things were found at 500 BC, so it's probably feasible.
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On January 10 2017 21:20 Cascade wrote:Show nested quote +On January 10 2017 20:56 opisska wrote:On January 10 2017 20:54 Morfildur wrote:
I'm wondering, semirelatedly,...
If you'd accidentally time travelled too far back, let's say year 1000 in central Europe, and you'd get stuck there, unprepared, with just your smartphone and a charger cable (because you thought you'd travel to somewhere with electricity), what would be the best way to charge your phone so you can keep playing sudoku or watch porn or whatever? Interesting to learn that you either keep porn to watch offline on your phone or think that internet predates electricity However generating stable charging voltage in pre-technological society would be pretty challenging. Your best bet would probably be some kind of chemical battery, but you'd have to know in advance, what actually works, as you would have no internet Even if you remember which metals go into the potatoes, you'd have a ahrd time finding the metals I think. Finding a potato should be easy.
You are not going to find a potato in medieval europe, either.
You could try building a generator, but producing constant 50 ohm 220V is going to be hard. I don't actually know what the tolerances on a charge cable are. Chemical battery might also work, but you are going to have to put a lot of them in row to achieve the necessary voltage. And you would have to open up your charger cable and apply the voltage to the correct wires in there. You are also going to then put a lot of the arrays in parallel to be able to achieve the current necessary without voltage drops.
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On January 10 2017 21:42 Simberto wrote:Show nested quote +On January 10 2017 21:20 Cascade wrote:On January 10 2017 20:56 opisska wrote:On January 10 2017 20:54 Morfildur wrote:
I'm wondering, semirelatedly,...
If you'd accidentally time travelled too far back, let's say year 1000 in central Europe, and you'd get stuck there, unprepared, with just your smartphone and a charger cable (because you thought you'd travel to somewhere with electricity), what would be the best way to charge your phone so you can keep playing sudoku or watch porn or whatever? Interesting to learn that you either keep porn to watch offline on your phone or think that internet predates electricity However generating stable charging voltage in pre-technological society would be pretty challenging. Your best bet would probably be some kind of chemical battery, but you'd have to know in advance, what actually works, as you would have no internet Even if you remember which metals go into the potatoes, you'd have a ahrd time finding the metals I think. Finding a potato should be easy. You are not going to find a potato in medieval europe, either. You could try building a generator, but producing constant 50 ohm 220V is going to be hard. I don't actually know what the tolerances on a charge cable are. Chemical battery might also work, but you are going to have to put a lot of them in row to achieve the necessary voltage. And you would have to open up your charger cable and apply the voltage to the correct wires in there. You are also going to then put a lot of the arrays in parallel to be able to achieve the current necessary without voltage drops.
I believe I would go with a dynamo and not a battery. Copper wire seems like something you can achieve at the time, Iron casing and axis too. Needs some refinement, but my guess is we could get it to work.
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On January 10 2017 21:49 Oshuy wrote:Show nested quote +On January 10 2017 21:42 Simberto wrote:On January 10 2017 21:20 Cascade wrote:On January 10 2017 20:56 opisska wrote:On January 10 2017 20:54 Morfildur wrote:
I'm wondering, semirelatedly,...
If you'd accidentally time travelled too far back, let's say year 1000 in central Europe, and you'd get stuck there, unprepared, with just your smartphone and a charger cable (because you thought you'd travel to somewhere with electricity), what would be the best way to charge your phone so you can keep playing sudoku or watch porn or whatever? Interesting to learn that you either keep porn to watch offline on your phone or think that internet predates electricity However generating stable charging voltage in pre-technological society would be pretty challenging. Your best bet would probably be some kind of chemical battery, but you'd have to know in advance, what actually works, as you would have no internet Even if you remember which metals go into the potatoes, you'd have a ahrd time finding the metals I think. Finding a potato should be easy. You are not going to find a potato in medieval europe, either. You could try building a generator, but producing constant 50 ohm 220V is going to be hard. I don't actually know what the tolerances on a charge cable are. Chemical battery might also work, but you are going to have to put a lot of them in row to achieve the necessary voltage. And you would have to open up your charger cable and apply the voltage to the correct wires in there. You are also going to then put a lot of the arrays in parallel to be able to achieve the current necessary without voltage drops. I believe I would go with a dynamo and not a battery. Copper wire seems like something you can achieve at the time, Iron casing and axis too. Needs some refinement, but my guess is we could get it to work.
I think it might be hard to get the necessary permanent magnets. You could of course just magnetize some iron with an electro magnet. If you had electricity. Which you need a generator for. Which you need permanent magnets for.
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On January 10 2017 21:58 Simberto wrote:Show nested quote +On January 10 2017 21:49 Oshuy wrote:On January 10 2017 21:42 Simberto wrote:On January 10 2017 21:20 Cascade wrote:On January 10 2017 20:56 opisska wrote:On January 10 2017 20:54 Morfildur wrote:
I'm wondering, semirelatedly,...
If you'd accidentally time travelled too far back, let's say year 1000 in central Europe, and you'd get stuck there, unprepared, with just your smartphone and a charger cable (because you thought you'd travel to somewhere with electricity), what would be the best way to charge your phone so you can keep playing sudoku or watch porn or whatever? Interesting to learn that you either keep porn to watch offline on your phone or think that internet predates electricity However generating stable charging voltage in pre-technological society would be pretty challenging. Your best bet would probably be some kind of chemical battery, but you'd have to know in advance, what actually works, as you would have no internet Even if you remember which metals go into the potatoes, you'd have a ahrd time finding the metals I think. Finding a potato should be easy. You are not going to find a potato in medieval europe, either. You could try building a generator, but producing constant 50 ohm 220V is going to be hard. I don't actually know what the tolerances on a charge cable are. Chemical battery might also work, but you are going to have to put a lot of them in row to achieve the necessary voltage. And you would have to open up your charger cable and apply the voltage to the correct wires in there. You are also going to then put a lot of the arrays in parallel to be able to achieve the current necessary without voltage drops. I believe I would go with a dynamo and not a battery. Copper wire seems like something you can achieve at the time, Iron casing and axis too. Needs some refinement, but my guess is we could get it to work. I think it might be hard to get the necessary permanent magnets. You could of course just magnetize some iron with an electro magnet. If you had electricity. Which you need a generator for. Which you need permanent magnets for.
Natural permanent magnets were already known (have been for 2000 years at least), but probably not so easy to get by, fair enough.
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On January 10 2017 22:07 Oshuy wrote:Show nested quote +On January 10 2017 21:58 Simberto wrote:On January 10 2017 21:49 Oshuy wrote:On January 10 2017 21:42 Simberto wrote:On January 10 2017 21:20 Cascade wrote:On January 10 2017 20:56 opisska wrote:On January 10 2017 20:54 Morfildur wrote:
I'm wondering, semirelatedly,...
If you'd accidentally time travelled too far back, let's say year 1000 in central Europe, and you'd get stuck there, unprepared, with just your smartphone and a charger cable (because you thought you'd travel to somewhere with electricity), what would be the best way to charge your phone so you can keep playing sudoku or watch porn or whatever? Interesting to learn that you either keep porn to watch offline on your phone or think that internet predates electricity However generating stable charging voltage in pre-technological society would be pretty challenging. Your best bet would probably be some kind of chemical battery, but you'd have to know in advance, what actually works, as you would have no internet Even if you remember which metals go into the potatoes, you'd have a ahrd time finding the metals I think. Finding a potato should be easy. You are not going to find a potato in medieval europe, either. You could try building a generator, but producing constant 50 ohm 220V is going to be hard. I don't actually know what the tolerances on a charge cable are. Chemical battery might also work, but you are going to have to put a lot of them in row to achieve the necessary voltage. And you would have to open up your charger cable and apply the voltage to the correct wires in there. You are also going to then put a lot of the arrays in parallel to be able to achieve the current necessary without voltage drops. I believe I would go with a dynamo and not a battery. Copper wire seems like something you can achieve at the time, Iron casing and axis too. Needs some refinement, but my guess is we could get it to work. I think it might be hard to get the necessary permanent magnets. You could of course just magnetize some iron with an electro magnet. If you had electricity. Which you need a generator for. Which you need permanent magnets for. Natural permanent magnets were already known (have been for 2000 years at least), but probably not so easy to get, fair enough.
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Zurich15365 Posts
On January 10 2017 21:58 Simberto wrote:Show nested quote +On January 10 2017 21:49 Oshuy wrote:On January 10 2017 21:42 Simberto wrote:On January 10 2017 21:20 Cascade wrote:On January 10 2017 20:56 opisska wrote:On January 10 2017 20:54 Morfildur wrote:
I'm wondering, semirelatedly,...
If you'd accidentally time travelled too far back, let's say year 1000 in central Europe, and you'd get stuck there, unprepared, with just your smartphone and a charger cable (because you thought you'd travel to somewhere with electricity), what would be the best way to charge your phone so you can keep playing sudoku or watch porn or whatever? Interesting to learn that you either keep porn to watch offline on your phone or think that internet predates electricity However generating stable charging voltage in pre-technological society would be pretty challenging. Your best bet would probably be some kind of chemical battery, but you'd have to know in advance, what actually works, as you would have no internet Even if you remember which metals go into the potatoes, you'd have a ahrd time finding the metals I think. Finding a potato should be easy. You are not going to find a potato in medieval europe, either. You could try building a generator, but producing constant 50 ohm 220V is going to be hard. I don't actually know what the tolerances on a charge cable are. Chemical battery might also work, but you are going to have to put a lot of them in row to achieve the necessary voltage. And you would have to open up your charger cable and apply the voltage to the correct wires in there. You are also going to then put a lot of the arrays in parallel to be able to achieve the current necessary without voltage drops. I believe I would go with a dynamo and not a battery. Copper wire seems like something you can achieve at the time, Iron casing and axis too. Needs some refinement, but my guess is we could get it to work. I think it might be hard to get the necessary permanent magnets. You could of course just magnetize some iron with an electro magnet. If you had electricity. Which you need a generator for. Which you need permanent magnets for.
https://www.amazon.de/Knowledge-How-Rebuild-World-Scratch/dp/159420523X/ref=sr_1_1?ie=UTF8&qid=1484053766&sr=8-1&keywords=the knowledge how to rebuild our world from scratch
This book would help. It basically gives you blueprints how to beeline to certain technologies if all you have is the knowledge about them. It's scenario is post-apocalypse, but you can apply the concepts to a time traveling scenario as well.
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On January 10 2017 21:42 Simberto wrote:Show nested quote +On January 10 2017 21:20 Cascade wrote:On January 10 2017 20:56 opisska wrote:On January 10 2017 20:54 Morfildur wrote:
I'm wondering, semirelatedly,...
If you'd accidentally time travelled too far back, let's say year 1000 in central Europe, and you'd get stuck there, unprepared, with just your smartphone and a charger cable (because you thought you'd travel to somewhere with electricity), what would be the best way to charge your phone so you can keep playing sudoku or watch porn or whatever? Interesting to learn that you either keep porn to watch offline on your phone or think that internet predates electricity However generating stable charging voltage in pre-technological society would be pretty challenging. Your best bet would probably be some kind of chemical battery, but you'd have to know in advance, what actually works, as you would have no internet Even if you remember which metals go into the potatoes, you'd have a ahrd time finding the metals I think. Finding a potato should be easy. You are not going to find a potato in medieval europe, either. You could try building a generator, but producing constant 50 ohm 220V is going to be hard. I don't actually know what the tolerances on a charge cable are. Chemical battery might also work, but you are going to have to put a lot of them in row to achieve the necessary voltage. And you would have to open up your charger cable and apply the voltage to the correct wires in there. You are also going to then put a lot of the arrays in parallel to be able to achieve the current necessary without voltage drops.
No need to make 220V AC for a smartphone, all you need is 5V DC, which means 3-6 chem cells depending on choice of materials.
Dynamos would be a pain to stabilize, better to make an alternator and use the actual AC charger then to stabilize.
I am still not sure what the phone shall be good for though, maybe you could perform miracles and live off it, but take care with witch trials.
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On January 10 2017 22:07 Oshuy wrote:Show nested quote +On January 10 2017 21:58 Simberto wrote:On January 10 2017 21:49 Oshuy wrote:On January 10 2017 21:42 Simberto wrote:On January 10 2017 21:20 Cascade wrote:On January 10 2017 20:56 opisska wrote:On January 10 2017 20:54 Morfildur wrote:
I'm wondering, semirelatedly,...
If you'd accidentally time travelled too far back, let's say year 1000 in central Europe, and you'd get stuck there, unprepared, with just your smartphone and a charger cable (because you thought you'd travel to somewhere with electricity), what would be the best way to charge your phone so you can keep playing sudoku or watch porn or whatever? Interesting to learn that you either keep porn to watch offline on your phone or think that internet predates electricity However generating stable charging voltage in pre-technological society would be pretty challenging. Your best bet would probably be some kind of chemical battery, but you'd have to know in advance, what actually works, as you would have no internet Even if you remember which metals go into the potatoes, you'd have a ahrd time finding the metals I think. Finding a potato should be easy. You are not going to find a potato in medieval europe, either. You could try building a generator, but producing constant 50 ohm 220V is going to be hard. I don't actually know what the tolerances on a charge cable are. Chemical battery might also work, but you are going to have to put a lot of them in row to achieve the necessary voltage. And you would have to open up your charger cable and apply the voltage to the correct wires in there. You are also going to then put a lot of the arrays in parallel to be able to achieve the current necessary without voltage drops. I believe I would go with a dynamo and not a battery. Copper wire seems like something you can achieve at the time, Iron casing and axis too. Needs some refinement, but my guess is we could get it to work. I think it might be hard to get the necessary permanent magnets. You could of course just magnetize some iron with an electro magnet. If you had electricity. Which you need a generator for. Which you need permanent magnets for. Natural permanent magnets were already known (have been for 2000 years at least), but probably not so easy to get by, fair enough.
Natural magnets aren't that strong either, right? Can you use a natural magnet to produce a stronger magnet from metal? That you then use to make an even stronger one? If so, I think we have an opening...
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On January 10 2017 22:52 Cascade wrote:Show nested quote +On January 10 2017 22:07 Oshuy wrote:On January 10 2017 21:58 Simberto wrote:On January 10 2017 21:49 Oshuy wrote:On January 10 2017 21:42 Simberto wrote:On January 10 2017 21:20 Cascade wrote:On January 10 2017 20:56 opisska wrote:On January 10 2017 20:54 Morfildur wrote:
I'm wondering, semirelatedly,...
If you'd accidentally time travelled too far back, let's say year 1000 in central Europe, and you'd get stuck there, unprepared, with just your smartphone and a charger cable (because you thought you'd travel to somewhere with electricity), what would be the best way to charge your phone so you can keep playing sudoku or watch porn or whatever? Interesting to learn that you either keep porn to watch offline on your phone or think that internet predates electricity However generating stable charging voltage in pre-technological society would be pretty challenging. Your best bet would probably be some kind of chemical battery, but you'd have to know in advance, what actually works, as you would have no internet Even if you remember which metals go into the potatoes, you'd have a ahrd time finding the metals I think. Finding a potato should be easy. You are not going to find a potato in medieval europe, either. You could try building a generator, but producing constant 50 ohm 220V is going to be hard. I don't actually know what the tolerances on a charge cable are. Chemical battery might also work, but you are going to have to put a lot of them in row to achieve the necessary voltage. And you would have to open up your charger cable and apply the voltage to the correct wires in there. You are also going to then put a lot of the arrays in parallel to be able to achieve the current necessary without voltage drops. I believe I would go with a dynamo and not a battery. Copper wire seems like something you can achieve at the time, Iron casing and axis too. Needs some refinement, but my guess is we could get it to work. I think it might be hard to get the necessary permanent magnets. You could of course just magnetize some iron with an electro magnet. If you had electricity. Which you need a generator for. Which you need permanent magnets for. Natural permanent magnets were already known (have been for 2000 years at least), but probably not so easy to get by, fair enough. Natural magnets aren't that strong either, right? Can you use a natural magnet to produce a stronger magnet from metal? That you then use to make an even stronger one? If so, I think we have an opening...
Small natural magnet to create an initial power that you feed in an electromagnet, and self excitation gives you the feedback loop you need to scale up afterwards.
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On January 10 2017 21:20 Cascade wrote:Show nested quote +On January 10 2017 20:56 opisska wrote:On January 10 2017 20:54 Morfildur wrote:
I'm wondering, semirelatedly,...
If you'd accidentally time travelled too far back, let's say year 1000 in central Europe, and you'd get stuck there, unprepared, with just your smartphone and a charger cable (because you thought you'd travel to somewhere with electricity), what would be the best way to charge your phone so you can keep playing sudoku or watch porn or whatever? Interesting to learn that you either keep porn to watch offline on your phone or think that internet predates electricity However generating stable charging voltage in pre-technological society would be pretty challenging. Your best bet would probably be some kind of chemical battery, but you'd have to know in advance, what actually works, as you would have no internet Even if you remember which metals go into the potatoes, you'd have a ahrd time finding the metals I think. Finding a potato should be easy.
Finding a potato in 1000 AD Europe is not going to be easy at all. How are you getting to South America?
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Dynamo seems by far the best option. Magnets have been known for a long time, so starting with a natural magnet you could build a pretty good electromagnet. Then you attach that to a wheel and presto, alternating current. All you need is a diode. Oh, and you'd better remember the number of coils you need for the required voltage, because I have no idea how that formula works anymore, and sure as hell they didn't know in 1000AD. Otherwise you can try trial and error with your phone, but if you shortcircuit it, you're not accessing any of your weird offline porn collection.
Actually it is a bit of a chicken-egg. Looking online to see how you build a decent magnet, you need either DC current or some fancy alloys that weren't around yet in 1000AD (hell, steel would be a good starter). Your best bet is probably going to be to align a cast iron bar with the earth's magnetic field and then bang it a lot with a hammer, which should give you a reasonable magnet to start with (better than going prospecting for natural magnets).
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You are not going to find the semiconductors necessary to build a diode. I guess you could try cannibalizing your charger cable,
Without a voltmeter you can basically forget about figuring out how much voltage your dynamo produces, because even if you remember the principle formula, you don't have all of the necessary information. Namely, you have no idea how strong your magnet is, and you have no way of figuring that out without going through a pretty long process of designing and calibrating detection equipments. Which probably involves designing a voltmeter anyways, so just start with that one.
I don't think that post-apocalyptic rebuilding and time travel medieval sciencing are necessarily the same thing. You are going to have a lot of shit lying about in a post-apocalyptic situation that you will never find in a medieval society.
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Zurich15365 Posts
On January 10 2017 23:35 Simberto wrote:
I don't think that post-apocalyptic rebuilding and time travel medieval sciencing are necessarily the same thing. You are going to have a lot of shit lying about in a post-apocalyptic situation that you will never find in a medieval society.
Read the book. I am pretty sure the author's pitch was: "I am going to show where in history civilization could have made leaps forward, if only the knowledge about X was available".
To which the publisher says: "Boring! We need zombies!"
Author: "I guess I could try to apply the same to a post apocalyptic scenario".
Publisher: "$$$"
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On January 10 2017 23:39 zatic wrote:Show nested quote +On January 10 2017 23:35 Simberto wrote:
I don't think that post-apocalyptic rebuilding and time travel medieval sciencing are necessarily the same thing. You are going to have a lot of shit lying about in a post-apocalyptic situation that you will never find in a medieval society. Read the book. I am pretty sure the author's pitch was: "I am going to show where in history civilization could have made leaps forward, if only the knowledge about X was available". To which the publisher says: "Boring! We need zombies!" Author: "I guess I could try to apply the same to a post apocalyptic scenario". Publisher: "$$$"
Sadly, my reading backlog is already pretty full at the moment. And i haven't even started getting into my girlfriends library.
At least some Amazon reviews claim that the book does not involve a lot of "how to".
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Why wouldn't you just make a sawmill and a steam engine? Takes less tech, easier to leverage, and it's a service you could offer to a region to gain oligarchic power. Use the money to invent a pyramid scheme where you provide tech and knowledge to neighboring village for a yearly price. Repairs and shit, and just customer service their resources into oblivion.
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On January 11 2017 03:05 Thieving Magpie wrote:
Why wouldn't you just make a sawmill and a steam engine? Takes less tech, easier to leverage, and it's a service you could offer to a region to gain oligarchic power. Use the money to invent a pyramid scheme where you provide tech and knowledge to neighboring village for a yearly price. Repairs and shit, and just customer service their resources into oblivion.
So you have a steam engine in 1000AD. Great. But you still can't charge your cellphone.
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EPT
