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  • wobbler commented on Budgiecake's instructable Spark plug fighter plane18 hours ago
    Spark plug fighter plane

    Very clever reuse of a spark plug!

    I look forward to seeing what you do with the rest of the engine.

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  • wobbler commented on NSSL47's instructable Bike Generator Charging Station6 days ago
    Bike Generator Charging Station

    Unless the rear wheel is a fixie, just like trying to cycle backwards on a normal bike, nothing will happen.

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  • The Drowned Diver Costume (Halloween 2016)

    Brilliant costume! It reminded me of seeing the Liverpool Giants Diver which commemorated the 100th anniversary of the Titanic sinking in 2012. It was done by a French street theatre company Royal de Luxe and was absolutely mind blowing. It was of course slightly larger than yours at 15m/50ft. You can see it coming out of the Albert Docks here and setting off across the city looking for his niece and her dog:C'est incroyable!

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  • wobbler commented on wobbler's instructable It's about time! watch.1 month ago
    It's about time! watch.

    Thanks. I presume you mean the other slow watch when you say expensive! However, that in itself was a copy of the original mechanical clocks which only had an hour hand as the mechanisms weren't accurate enough to keep minutes and at that time minutes were less important to life than the hours. Eventually in the late 17th century the use of a pendulum allowed more accurate timekeeping and the minute hand was added. I'm just completing a time loop back to before 1690.You'll find more details in the referenced Wiki:https://en.wikipedia.org/wiki/Clock_face#Historica...As the saying goes, there's nothing new under the sun.

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  • wobbler commented on rotormind's instructable 3D Printing a Transparent Sphericon2 months ago
    3D Printing a Transparent Sphericon

    I only found the video, I was not the maker of them. However, going back to the original YouTube video, they referenced here for details of the sphericon:http://www.thingiverse.com/thing:112367It also led to this, a singing oloid, which I found quite hypnotic:http://www.youtube.com/watch?v=2d2RchtzD-4

    I only found the video, I was not the maker of them. However, going back to the original YouTube video, they referenced here for details of the sphericon:http://www.thingiverse.com/thing:112367It also led to this, a singing oloid, which I found quite hypnotic:www.youtube.com/watch?v=2d2RchtzD-4

    I only found the video, I was not the maker of them. However, going back to the original YouTube video, they referenced here for details of the sphericon:http://www.thingiverse.com/thing:112367

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  • wobbler commented on BrittLiv's instructable Thor's Hammer Toilet Brush3 months ago
    Thor's Hammer Toilet Brush

    I like this, but at first I thought "You must be s***ing me!".

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  • wobbler commented on treeofmotion's instructable BRANCHBOARDING / TREE OF MOTION3 months ago
    BRANCHBOARDING / TREE OF MOTION

    Maybe that's all fir now.

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  • wobbler commented on wobbler's instructable Easy-type Secure Passwords3 months ago
    Easy-type Secure Passwords

    just read this. My post is about being able to keep a list of different passwords in a secure way. Using the same pass phrase across many sites isn't secure. If I have to substitute numbers in the passphrase to keep it more secure, how do I record/remember all the different passwords? That's the problem I'm trying to deal with here.Finally, using an encrypted password database is ok on one machine, but I use different machines and I find this easy to do. I could even use somebody else's machine if I wanted (although I wouldn't trust it!).

    It lets me keep a written record of the many passwords I seem to be accruing in a book. I use different passwords for all of the different sites I use for security. However, writing down passwords isn't exactly secure, so the unique missing secret word, which is personally easy to remember and I don't need to write down acts as a security feature for the written down passwords. If the extra word isn't present, the written passwords won't work. Hope that makes sense.

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  • wobbler commented on turboterra's instructable 1960s Style Leather Duffel Bag3 months ago
    1960s Style Leather Duffel Bag

    Beautiful design!

    Beautiful design! Would also be easily modified to make a very classy bike saddlebag. It got my vote!

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  • wobbler commented on Venkat Jayanth's instructable Simple Super Capacitor3 months ago
    Simple Super Capacitor

    To see how a real capacitor works, why not repeat the experiment with an actual capacitor? So, what will happen if you do? Firstly, when you put the battery to the capacitor it will charge up to the battery voltage. Now, if you are using a digital voltmeter it will have a high input impedance and when the battery is removed, the voltage will not change or decay. To make it decay, put a resister across the capacitor (the bigger the resistor, the slower he voltage will drop). It will continue to drop but something else will happen. The voltage will be an exponential curve. That means it will always take the same time to go from any voltage to half the voltage. Time it and see e.g. if it takes 45sec to go from 8v to 4v, it will take 45secs to go from 4v to 2v or 45 seconds from 6.5v to 3.2...see more »To see how a real capacitor works, why not repeat the experiment with an actual capacitor? So, what will happen if you do? Firstly, when you put the battery to the capacitor it will charge up to the battery voltage. Now, if you are using a digital voltmeter it will have a high input impedance and when the battery is removed, the voltage will not change or decay. To make it decay, put a resister across the capacitor (the bigger the resistor, the slower he voltage will drop). It will continue to drop but something else will happen. The voltage will be an exponential curve. That means it will always take the same time to go from any voltage to half the voltage. Time it and see e.g. if it takes 45sec to go from 8v to 4v, it will take 45secs to go from 4v to 2v or 45 seconds from 6.5v to 3.25v. The decay time is a function of the capacitor size and the resistor size. Look up why on the web by looking up "RC decay".Try it first using maybe a 100uF cap and a 1megohm resistor. Then make the cap bigger or smaller and see what happens (maybe double it) or make the R smaller or bigger and see what happens.ref:http://www.electronics-tutorials.ws/rc/rc_2.html

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  • wobbler commented on treeofmotion's instructable BRANCHBOARDING / TREE OF MOTION3 months ago
    BRANCHBOARDING / TREE OF MOTION

    I think you might be barking up the wrong tree.

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  • wobbler commented on Venkat Jayanth's instructable Simple Super Capacitor3 months ago
    Simple Super Capacitor

    oops done the above reply on a tablet!lots of errors! Will edit later on laptop so ignore above until I've sorted it! Damned auto correct! Apologies!

    Unfortunately your physics teacher doesn't know what he is talking about. I have explained fully in my previous references, I'd suggest you talk to either a local radio ham or trained electronics person who actually understands the difference between a battery/cell and a capacitor/condenser. Also, do a Google search for how capacitors work, there are lots of sites which will give you a good overview.

    I don't know why you keep insisting this is a capacitor. What you have made is actually one of the first electric cells, a Galvanic or Voltaic Cell, named after their inventors. See the reference for further details and for a fuller explanation of how they work. If this was a capacitor it would work with both electrodes having the same material, which this design will not do.You also seem to not understand about how a capacitor would actually discharge if you were measuring it using a voltmeter. A charged capacitor will discharge through a load with an exponential decay. It will continue to decay. It will not drop down and then stop at a certain value, it will continue to decay to lower and lower voltages.ref:https://en.wikipedia.org/wiki/Galvanic_cell

    To see how a real capacitor works, why not repeat the experienced Kent with an actual capacitor? So, what will happen if you do? Firstly, when you put the battery to the capacitor it will charge up to the battery voltage. Now, if you are using a digital voltmeter it will have a high input impedance and when the battery is removed, the voltage will is fly change or decay. To make it decay, put a resister across it (the bigger the resistor, the slower he voltage will drop). It will continue to drop but something else will happen. The voltage will be an exponential curve. That means it will always take the same time to go from any voyage to half the voltage. Time it and see! E.g. if it takes 45sec to go from 8v to 4v, it will take 45secs to go from 4v to 2v or 6.5v to 3.25v. The decay time...see more »To see how a real capacitor works, why not repeat the experienced Kent with an actual capacitor? So, what will happen if you do? Firstly, when you put the battery to the capacitor it will charge up to the battery voltage. Now, if you are using a digital voltmeter it will have a high input impedance and when the battery is removed, the voltage will is fly change or decay. To make it decay, put a resister across it (the bigger the resistor, the slower he voltage will drop). It will continue to drop but something else will happen. The voltage will be an exponential curve. That means it will always take the same time to go from any voyage to half the voltage. Time it and see! E.g. if it takes 45sec to go from 8v to 4v, it will take 45secs to go from 4v to 2v or 6.5v to 3.25v. The decay time is a function of the capacitor size and the resistor size. Look up why on the web!

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  • wobbler commented on treeofmotion's instructable BRANCHBOARDING / TREE OF MOTION3 months ago
    BRANCHBOARDING / TREE OF MOTION

    Is this a date?

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  • wobbler commented on Venkat Jayanth's instructable Simple Super Capacitor3 months ago
    Simple Super Capacitor

    Definitely a battery!

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  • wobbler commented on treeofmotion's instructable BRANCHBOARDING / TREE OF MOTION3 months ago
    BRANCHBOARDING / TREE OF MOTION

    Sorry, decided it wooden't work. Think I'vy been barking up the wrong tree.

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  • Tube Radio in Steampunk Design

    Nice design. I really like the knobs idea.

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  • Easy way to clean your soldering iron without damaging the tip.

    Also, keep a damp sponge in a tin on hand to just clean it on as your using it. If you use one of those with the rough pan cleaner side they work really well.

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  • wobbler commented on treeofmotion's instructable BRANCHBOARDING / TREE OF MOTION3 months ago
    BRANCHBOARDING / TREE OF MOTION

    Great idea! Have you thought of branching out elsewhere? Maybe a tree ton truck?

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  • wobbler commented on Detectingdragon777's instructable Simple fm radio3 months ago
    Simple fm radio

    OK Get back to me when you've finished it and I'll remove my comments. Best not to publish until finished.

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  • wobbler commented on wannabemadsci's instructable Our Solar System To Scale3 months ago
    Our Solar System To Scale

    Very clever and a good way to get the idea of the scale of the solar system. I'm not too good at ratios though. I might try making it to a 1:1 scale to make it easier to measure.

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  • wobbler commented on lonesoulsurfer's instructable Pocket Rocket3 months ago
    Pocket Rocket

    You've just got to love how happy that kid was after the first launch! You can't buy smiles like that.

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  • wobbler commented on Blair0's instructable Leather suspenders 3 months ago
    Leather suspenders

    So good, they could almost make me wear braces.

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  • wobbler commented on techydiy's instructable XMEN LED EDGE LIT MIRROR SIGN4 months ago
    XMEN LED EDGE LIT MIRROR SIGN

    Got it! Thanks for that. Maybe I need to think about using this idea on a semi-silvered or front silvered sheet of acrylic (if there is such a thing!).

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  • MY BECK STYLE MAGNETIC PULSAR out of a fire alarmf

    I can't work out if this is a spoof or a pseudoscience mumbo jumbo thing. If it's a spoof, it's well done, if it's not, you have my sympathy.

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  • wobbler commented on deytech's instructable Floating Bed With LED Lights4 months ago
    Floating Bed With LED Lights

    That sounds brilliant. Instructable or photo?

    I thought the same about it lighting up when you got up at night. I was thinking of some kind of weight sensor but it would be difficult to implement I suspect, especially for two people. Your idea sounds much better.

    Could always flood the bedroom as an alternative option.

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  • wobbler commented on techydiy's instructable XMEN LED EDGE LIT MIRROR SIGN4 months ago
    XMEN LED EDGE LIT MIRROR SIGN

    Nice Instructable. If you've engraved the back, is that the silvered or non-silvered side? (from your Instructable it seems like it's the non-mirrored side). If so, as you only show pics of it back lit and effectively showing through, I assume you could put a card back or have it on a wall and the writing only appears when lit? I fancy using this idea some time with a batman logo or maybe an alien but like the idea of it only appearing when you light up the mirror. It might also make a good Spiderman light for my great nephew! I hope I have the time to implement my ideas!If you can't get acrylic mirror sheet or you want to add this effect to a mirror you've already got I suspect you can do what you did but with just normal acrylic sheet and put a mirror behind but you'd possibly lose th...see more »Nice Instructable. If you've engraved the back, is that the silvered or non-silvered side? (from your Instructable it seems like it's the non-mirrored side). If so, as you only show pics of it back lit and effectively showing through, I assume you could put a card back or have it on a wall and the writing only appears when lit? I fancy using this idea some time with a batman logo or maybe an alien but like the idea of it only appearing when you light up the mirror. It might also make a good Spiderman light for my great nephew! I hope I have the time to implement my ideas!If you can't get acrylic mirror sheet or you want to add this effect to a mirror you've already got I suspect you can do what you did but with just normal acrylic sheet and put a mirror behind but you'd possibly lose the hidden until lit effect. You could even get a bit of doubling on the lit image by placing the mirror further back.

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  • wobbler commented on SheikhJ's instructable PH Test of Popular Beverage Like Pepsi 4 months ago
    PH Test of Popular Beverage Like Pepsi

    It would have been a better Instructable with an explanation of what the ph values mean, both generally and in terms of dental health. There is a good table of common drinks ph's shown here:http://www.21stcenturydental.com/ph_drinks.htmlIt's interesting to see how most drinks we have are actually acidic. There is also a good quote from the end of that page about the ph scale:"Because the pH scale is logarithmic, a one unit change in pH is associated with a 10 fold change in the acidity. For example, lemon juice has a pH of2.0, while grapefruit juice has a pH of 3.0. Lemon juice would therefore be10x as acidic as grapefruit juice. Even more enlightening, Coke Classic isroughly 100 times as acidic as Barq's root beer."There is also a discussion of how the different acidsin drink...see more »It would have been a better Instructable with an explanation of what the ph values mean, both generally and in terms of dental health. There is a good table of common drinks ph's shown here:http://www.21stcenturydental.com/ph_drinks.htmlIt's interesting to see how most drinks we have are actually acidic. There is also a good quote from the end of that page about the ph scale:"Because the pH scale is logarithmic, a one unit change in pH is associated with a 10 fold change in the acidity. For example, lemon juice has a pH of2.0, while grapefruit juice has a pH of 3.0. Lemon juice would therefore be10x as acidic as grapefruit juice. Even more enlightening, Coke Classic isroughly 100 times as acidic as Barq's root beer."There is also a discussion of how the different acidsin drinks affect the teeth differently here:http://www.livescience.com/7198-acids-popular-sodas-erode-tooth-enamel.html

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  • Protect Mobile in Crowd From Being Stolen

    Great idea and I like that I could use the idea in a jacket.. The only problem I can see is if a really clever thief steals your trousers!

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  • wobbler commented on keebie81's instructable My Ray Gun From Found Objects4 months ago
    My Ray Gun From Found Objects

    The trouble with quantum oscillators is they are working and not working until you actually look at them. I also don't like how they keep disappearing and reappearing again at random. I've started to use Multiverse branded oscillators instead which are made out of a spacially resonant string. Only problem is they are so small they are really difficult to solder and don't even bother looking for one if you drop it.

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  • wobbler commented on artworker's instructable Acupressure Tool Made From Chopsticks4 months ago
    Acupressure Tool Made From Chopsticks

    Is it best if the chopsticks are a foot long?

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  • DIY Face Shield (w/ Built in Safety Glasses)

    As a safety device, you've probably increased the potential for danger. Because the safety glasses are on the outside, if you had an impact which caused the mask to move those sharp points around the eye cut-out look like real hazards, waiting to scratch or, even worse, to end up embedded in an eyeball.It would have been safer not to cut out the eye holes but to leave the mesh intact and look through it.

    As a safety device, you've probably increase the potential for danger. Because the safety glasses are on the outside, if you had an impact which cause the mask to move those sharp points around the eye cut-out look like real hazards waiting to scratch or even worse to end up embedded in an eyeball.It would have been safer not to cut out the eye holes but to leave the mesh intact and look through it.

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  • wobbler commented on keebie81's instructable My Ray Gun From Found Objects4 months ago
    My Ray Gun From Found Objects

    Looks fantastic. What's the range on this thing and how many shots?

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  • Fireproof Carbon Foam from Pyrolysed Bread

    That's easy- it will become a hole loaf.

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