Explosive Fun with a Capacitor Bank

Watch a 24kj capacitor bank as it discharges through various objects. Maniacal laughter follows each one and a slo-mo montage finishes it all up. via Make blog

Topic by fungus amungus   |  last reply

Whats a cheap and fun hobby that a teenager can enjoy?

Ive always enjoyed tinkering and building things in the garage and im always open to new things... because im a kid i dont have alot of money to spend on a hobby and id like to expand from the woodworking and cannon makeing hobbies i have already... just wondering what the instructables comunity had to offer!

Question by kdaviskid   |  last reply

anyone there

Is this gruopstill alive i loved speed challenges they were so much fun

Topic by Dowaine   |  last reply

Baking soda/vinegar rocket

I recently made a baking soda/vinegar rocket and I wondered if I should post it.It uses 1/2 pipe and a bottle.I was wondering whether or not to post it.Please tell me what you think.

Topic by bylerfamily   |  last reply

I have just added a new group! We would love new members

Greetings, I have just added a group on instructables. we welcome all with any kind of instructable (except for knitting and origami) it would be awesome to have you join today https://www.instructables.com/group/fakirswelcom/

Topic by Pumpkin$ 

What is a good family project for a rainy day? Answered

Answer quickly and get a best answer! NM

Question by NatNoBrains   |  last reply

Ripstik/Waveboard at skatepark

How many of you have tried bringing your ripstik or waveboard to a skatepark? If not, it's really fun.

Topic by downhilldman   |  last reply

What fun stuff can we do with a garage door torsion spring? Answered

Recently, I received a 10 foot section of new overhead door garage door torsion spring. It looks like the picture below (but mine is spring only - does not have the mounts on the ends). What fun stuff can we do with this spring? 

Question by bobzjr   |  last reply

Mythbusters - How to pancake a car Video

A great video of the mythbusters team firing a two-stage rocket sledge into a car in an attempt to pancake it :PAt the point of impact the sledge was traveling at 650mph !!The car doesn't really get pancaked, it just kinda... disintegrates, which is completely awesome.

Topic by =SMART=   |  last reply

What's your Science Fair project?

So, this is how our science fair project for the elementary school science fair turned out. Everyone should be encouraged at a young age to have an interest in science. As they say, "If you ain't having fun in science(or any other subject), you ain't!" This was crafted from paper mache(monocoque nose shell over a cardboard superstructure), laminated cardboard eyeglass frame, and homemade science fair display board.We thought about everyone wanting to touch the display so we put black yarn in the open nostrils below to simulate nose hair if someone decided to pick this nose. We couldn't add slime. Gross-out factor is high in the fun quotient. Remember, you can pick your friends; you can pick your nose; but you can't pick your friend's nose... It would be great if we could see what everyone else worked on. Of course we need ideas to top this one for next year's project! Edit 5/20/08Yay! Caitlin was co-winner for first place in the Fourth Grade Science Fair at school. The other girl won for testing to see if different strengths of Listerine actually helped kill germs in the mouth by doing swabs and cultures. Congrats to the young ones.

Topic by caitlinsdad   |  last reply


TITAN the High Powered Minature Water RocketOk, yeah sure. What the hell is that then?I'ble to follow...If someone can find me a smaller one, i'll beat it.It stands 7 inches high.TITAN flys well over 70 foot and has a alloy chamber capable of withstanding over 250 PSI.Oh how I love compressed air!Don't worry Poseidon is still in the making and will be posted for the "Keep the bottle" contest. There is also another full bore, open throat 5 x 600 ml rocket to come.

Topic by Lftndbt 

does anyone know about, chemistry, bircks and metals? Answered

umm, i was resently being bored with an arc welder (not a safe thing) and amzed to find that if you put enough energy into a normal red brick that it will chemicly start to decompose, it left a large area missing and with a grey almost glass like surface in the area with the most abuse, (this i can understand) the thing that i found that was odd about this was when i lookd at the small colection of metal that formed when it cooled, the main thing in it is iron (i was using an arc welder with normal rods and an iron rod) but i appears to have an almost flaking metal surounding it, its not impusitys that u normal get when weldin, it has an irridesent purple colour to it and is problaby made up from something in the brick. any ideas?

Question by thelastonekills   |  last reply

Tank Implosion

Fun with air pressure and a vacuum.via Neatorama

Topic by fungus amungus   |  last reply

Hydraulic or air powered carousel horse, is it possible?

I have a niece who is fond of carousel rides, and I wanted to try to make her a fun ride.  Is it possible to have a hydraulic system (Like the ones they use in lowriders, perhaps...) or air pump be used to raise and lower a carousel horse while someone is sitting on it?  My initial idea is this... I turn a switch on starting the pump, and the horse slowly raises up about 1 foot... turn the switch off, and the horse goes back down, repeat, etc....  Anyone knowledgeable who could help me with this?  Thank you!

Question by Isabelle356   |  last reply

Simple Zapper Idea

I have learned about electricity in Physics class and that to up the voltage of a given source there has to be an alteration in the amount of turns of wire around some magnets. BUT... is it possible to do this same thing in my home on a smaller scale by wrapping wires around some of my powerful earth magnets? The reason for asking is that I want to increase the current flow so that it starts zapping when the wire ends come near, also I want to create a ground based bug zapper for fun that will allow the zap to travel through water (shallow puddles). Sorry if I'm missing some law of physics that renders this impossible for me but I'm not taking the advanced course for science and we only touched on  the topic electricity.

Topic by Ninja Togo   |  last reply

i would like to creat a large steam engine, big enough to power a vehicle made of bikes that seats 3.

The vehicle would be pedaled until some speed was reached, then the engine would be switched on. the bike contraption would consist of two bikes side by side, held together by lumber. two of the seats would be mounted in the bikes original seat holes, on the side, and the third would be in the middle, the driver. the front wheels of the side bikes would be removed and he front end of a third will be used in the front. the vehicle will be like a giant, steam powered tricycle. Other engine ideas, other than gas powered, would be greatly appreciated, the cheaper the better.

Question by poozipotti   |  last reply

Magnetmotor - really impossible or just supressed?

When someone starts talking about a so called magnetmotor than most people judge right away.Laws of physics, perpetuum mobile is impossible, magnets are static....We all know the limitations nature puts on us... That however did not stop quite a few people since the 1950's to build working magnet motors. Or, to be precise: To make the claim, show them and then somehow disappear. A few though seem to have survived and even claim to make good business. Securely closed machine, stellite tracking and 24/7 online monitoring. Either just a bad and long running hoax or a real attempt to keep a secret secret. Even the somewhat famous Yildiz motor showed off around the world only to disappear.Some like them, some don't. Either way all this sounds like the perfect conspirary theory LOL So lets take a look on what is fake and what might be real but missing some vital clues. You can find several good Youtube channels created by people trying to build a working magnet motor. Some of them have no problems to admit failure and still keep trying and updating their projects. Did long enough and you see two outcomes. The first is giving up or "realising" that it will never work. The second often seems like a user is getting some relly good results and is really close to keep the magnetmotor running. Both disappear without and updates or traces. Now of course this is just confirmation that it will never work, but then again: What if it did already quite a few times? Even Tesla had patents for a magnetmotor and so far none of his patents were a hoax. Although none of his patents allow to actually build a working devices without some additional info and knowledge. And that is the key that I am trying to get: The lost knowledge.How can a magnetmotor never work? That one is quite simple from the start. If a linear model won't work no matter where you start then a rotary version will fail as well. And if a linear version works, it has to do so far at least 5 segments and with preferably increasing or at least constant speed. Having said that and assuming you know a little bit about magnetism: Ever wondered about shapes of magnets?? The common types are block, round like a bar and those disk like ones, some even with holes. A less well known version is the ring magnet. You can look them up as well as their corresponding magnetic field geometry - or what is assumed to be the right geometry. To give you a clue: All those floating spinning toys use a ring magnet in the base and onother one in the spinner. In the center is a dead zone for the magnetic field that is far lower than further out on the ring. And the strnger outer fields also reach further - giving the entire spinner a bowl like area to float on, the spinning just stabilises it like a gyroscope. A similar flat disk magnet wouldn't have this indentation in the field but rather a dome like sphere. The ring just kicks a dint into this sphere if you don't mind the simpification. Similar changes in the field structure happen when you combine two or more magnets. One example we all know is stacking identical smaller magnets. And often we are suprised how much stronger two thin disk magnets are compared to a single. Distance however sets a certain limit. And take those hook magnets... Just a small ring magnet in a metal pot with core. Remove the magnet and just by itself it is far weaker. Why? Quite simple.... The same way a transformer core directs the magnetic flow, the metal part of the hook magnet provides a shortcut for the magnetic field - and in return all is much stronger ;) Now you have some more clues, but still there are tons of options for failure... The most common is the sticking effect. No matter how well you planned and designed in most cases you linear or rotary prototype will stall sooner or later. Even if started manually at high speeds some seem to run very long but once they slow down and stop it is obvious they always stop where the magnetic field won't allow the binding effect to be overcome.Wouldn't dare to say that I have a working magnetmotor, but I might have some clues you want to try if you decide to give it a try yourself. So how COULD a magnetmotor actually work? Like in the Perendiv examples all over the web, you could aloow a moving responder to the rotor. Like a piston the responder will be lifted in areas it would otherwise limit or reduce the speed of the system. Well designed only a few mm would b required but it also means wasted energy to move the responder. Then there is the nice way of modifying fields by adding magnets in different angles and polarities. Lets say towards the end of your stages on the linear model it is hard to overcome the binding effect from the end of the previous stage. The perendiv model would now somehow change the distances. But you can also add magnets to lower the binding effect ;) Like a ring or hook magnet you can shape the field and offer a stronger repulsin field or a lower binding force. Last but certainly not least is the option of adding magnetic metals like iron or somehow weirder ones like bismuth. So, do we have any examples of something very common utilising any of this? We sure do :) Take a speaker apart and you end with the cage, the membrane, the actual work coil and the magnet. We don't need anything but the magnet so take a good and very close look. What in the audio world is called a shield to prevent the magnet from messing with things close by is exactly the same as on a hook magnet ;) Only difference is the tiny gap for the coil. The magnetic field is directed into two paths, one by the metal core, the other by the inner enclosure of the magnet or the magnet itself. The coil operates in the area of maximum flux.Last hints... If you take two identical and strong magnets with north or south facing up then it is quite hard to push them very close together. But check what happens if you try the same wen both soth poles (or both north poles) are placed on a magnetic surface - if in doubt your standard fridge door. Suddenly you can move much closer together with the same amout of force (not considering the added friction!). And similar story for opposing configurations. Where in free air or on a table the magnets would just jump together, on a metal plated you can move them much, much closer before this happens. Copper pipe and magnet fun :) Ideally you would have a straight copper pipe and a cylindrical magnet that has a loose fit in the pipe. Aluminium pipe work too or even a roll of aluminium foil if you have nothing else. A magnet in the pipe will travel very slow down the pipe, friction is not an issue here. So what is slowing it down? The magnet creates a field in the pipe and through that the pipe generates electicity. And funny enough this electricity creates an opposing magnetic field in the pipe - the magnet slows down. Even if you glue it onto a wooden stick it won't rush through it. Trying to push it by hand and you feel the created resistance. The faster you push, the harder it is to push! If you made it all the way down here with the reading then I have to assume you fit into one of three of my categories. a) You are a total sceptic and just read it for your amusement. If so, then please don't post a reply with usual negative feedback, instead see it as the same fun you had reading it ;) b) You are at least curious and like to play with magnets. In this case take the above as inspiration to explore more ways to have fun with your magnets! c) You are more or less frustated because you wasted a lot of time and some money to build a magnet motor that just won't work. A and B might go on and enjoy the fun, C however might want to read very attentive now ;) If you take some indicator sheet for magnetic fields, like these funny green ones, and play with moving magnets then you see a very interesting effect on the "screen". The otherwise static field lines change chape and sometimes even seem to disappear or shrink. With a small rotor assembly it almost looks like flashes when the magnets move past each other. This effect is often totally neglected and to be honest I overlooked it for a long time as well. Being able to see how the magnetic field changes gives the thing an whole new dimension so to speak. Creating a magnet with a complex shape is difficult to say the least. Only ferrite or ceramic ones can be used and you would cut of machine them according to your desired shape and with regards to the orginal center of the magnetic field. So most people revert to the classic way of shaping by adding magnets of various types, sizes and amounts. Modern neodymium magnets make this trial and error process easier as there are many sizes and strengths available. Add a detector shield of suitable size and you have hours of fun time ahead of you. But doing so in any rotary assembly is next to impossible. So what did Yildiz differently and what was missed so many times? Yildiz took it a step further and not only provided "shunts" to create very strong magnetic field from the generated electricity but also a second rotor. Since we all start small lets focus on the basics first. Remember the hook magnet and speaker or the copper pipe? Some examples for shape shifting your otherwise static magnetic fields: 1. A magnetic metal "connection" from one (low in the armature) pole to an opposing (high in the amature) pole with cause the field from the "high" pole to "bend" towards the connected magnet. 2. A magnet with an orientation of 90° to the last magnet is the sequence will severely influence the field of this last magnet! This goes for either orientations! 3. Adding a non-magnetic "shield" around a magnet, like a piece of copper pipe, will not affect the static field of the magnet. However it will severely alter the field of the enclosed magnet when another magnet passes it! It will also affect the overal field during the passing as the moving magnet will also induce a field in the copper by affecting the field of the enclosed magnet! Thickness and lenght of the shield influence the strength of these effects. 4. In a simple perendiv motor design the bar that creates the attraction for the spinning part is a magnet too. Either a long bar type or two small ones with an iron or nickel rod between them. There is no need for a piston or something that drives the bar up or out of the way ;) Just use the right magnet at the right spot on your rotor to repell the bar ;) Mount the ar with suitable springs and you suddenly can have multiple stages on your rotor instead of just the usual one! Don't forget the moving magnet on the opposing side of the segment in question though as otherwise you still will get stuck. (Hint: You can place a small but powerful magnet in the center of the opposing bar ;) Just make sure you limit the springs movement so the bar won't be pulled closer)Ok, hold on now! Does a magnet motor actually work or not? I can only give hints and say the laws of physics as we know them apply to magnetmotors the same way as everything else. Unlimeted motion without supplying energy is not possible. Limited motion with adding or using energy however is still possible and real. The same is true for being able to machine, 3D print or otherwise manufacture at very tight tolerence and accuracy levels. This includes bearings or bearing systems with very little friction losses. Just check these floting and rotating magnet toys that look like a spindle. Only a tiny needle like pin makes contact with a glass surface - next to no friction loss. A proper and supposedly working magnet motor should provide more energy than what it uses - one way or the other. No law of physics lets us get around the fact that such a motor could only keep spinning if the produced power or motion energy is at least the same as what is required to make it move. Magnets lose their strenght over time, they are like a very slowly depleting battery. So, isn't it funny that all magnet motors so far that claimed to work also had the requirement to replace the magnets once the things fails to work or start? And if you leave a very strong neodymium magnet shielded from outside fields or magnetic stuff than your grandkids will still find a quite strong magnet. Do a little performance test with your new magnets, like how much force is required is required to lift them off a steel plate. Make the same test with the magnets once you played around extensively with them in your motor. Now take a spare magnet that was never used from the orginal batch and compare both against each other ;) If the motor would not use energy then why are the magnets depleted to a certain degree, realted to runtime and usage time? Wait a minute! Does that now mean it actually works? Lets just say energy is certainly used. We only know similar effects from electromagnetic systems. But did anyone ever really check how much actual energy is in magnetic field generated by a non electric magnet? Get a good sized N52 neodymium magnet and check how much force is required to pull it off a steel surface. Now try to get the smallest sized electromagnet capable of that force and check how much energy it consumes at the level that equals the pulling force of the N52 magnet ;) Makes no sense to even try to compare these you will say now. I just say energy is energy and we were formed to only think in certain ways and don't even try silly things like this ;) To keep the fun up let us imagine we would actually have a similar energy available than what our electro magnet would require. In reality more because we wouldn't have electrical or flux related losses in the metal around the coil. Or is the imagined reality, no clue ;) If true it would mean even a motor with very bad efficiency would be able to create huge amounts of torque. Well, torque is basically acceleration. Which would mean our motor would not just be happy to spin, it would speed up until the bearing fail or the thing is ripped apart. Imagine a dental drill of that size and weight suddenly falling apart at full speed... Every example of motors claimed to be working, that are not fakes, seem to be happy no matter what the load is. It the thing turns a generator than it would have to slow down a bit with the increased load but they don't. With no limited factors otherwise this makes them a fake. Even a perfect motor would have to react to load changes.... Don't we agree that the stronger the magnetic force or field in a conductor the stronger the resulting magnetic and opposing field of the conductor? We use the difference to either drive a motor or take out electricity... But if you take the "open" shielding of a magnet in a changing field than the influence of the shield on the overall field gets stronger with stronger field changes. And properly desinged and orientated they would actually double as a natural limiter for the rotation speed. Once the electrical energy in the shield becomes too strong it will be able to cancel out the field of the enclosed magnet...If we assume a magnet motor is really possible and works with the intended output to keep it spinning or even take energy out: Then what would be possible downfalls that stop this thing happening in everyones garage? We can explore the stars but so far no one bothered to invent anything to visualise magnetic field in a 3 dimensional way other than by simulation. No realtime and true observation like this. The few working technologies that exist rely on sensors, interpretaion and filling in gaps. But imagine something like a detector shield as cloud! And then even better with selctive spacing to get a realtime view of where exactly the field lines go. All we can do is forget our teaching and try it out anyway ;) If by some mistake a magnet motor would really work right away, then chances are high the inventor would wonder why that thing takes off like mad and how to stop it. Unless well prepared it would certainly end in the destrution of the motor. But the inventor would know what to look for in the next prototype. The logical conclusion would be to the couple the energy taken to the speed while physically limittin the free load speed. The other one would be the design the electrical generator around the and within the motor. To even get close to this point you would have to spend endless days and nights working on finding a solution. The closer you get the more disappointment when the final model still fails to keep spinning for more than a few hours. Most people will then accept defeat and move on... Still not saying it actually works but if you made it to this point in time where it could be easier to move on and do other things:Ever wondered what would happen if you "shield" a magnet with a coil? Of course nothing would happen as we know. But try this in some fixed assembly that allows you move another magnet through the field of the shielded one. Perferably witha force gauge or some option to read out the energy required to move it through the various stages of the field. See what happens if you short the coil or add a resistor to it ;) Now if this coild is able to produce electricity then the more we use the more the effects on the required force would change. What do you think would happen if you combine common coil relations of electric motors to a "coil shielded" magnet motor? Right, all these coils would interact with the magnetic fields of the coils they are connected to... And through that with the overall field surrounding the enclosed magnet..... I leave up to you to imagine how these interacting coils could provide "resistance" or "acceleration"/"surplus electricity"...Like they say: You can only find out if you try ;) To keep up the positive thinking: A permanent magnet just sticks to any magnetic surface and does so with the same force. But the real energy loss in terms of getting weaker can almost be neglected. Any electromagnet capable of the same holding force woul require ongoing energy supplies to keep it up. It is using energy the same way the permanent magnet does! The difference is the permanent magnet is not seen as anything that would provide us with energy.... And if it can't provide energy other than passing through coils then why the heck does it keep sticking to the fridge year after year? It does require energy to keep this weight up doesn't it, even if you add a thin teflon disk and oil to reduce friction? ;) No magic, no "free energy" bogus, just plain physics viewed from a slightly different angle than what we learn in school ;) Have a good laugh and a good beer, then read it again and just consider some of the things here that are not mentioned in any literature about magnetism that we commonly use. Now I got you thinking, didn't I ? ;)

Topic by Downunder35m   |  last reply

A little magnet experiment for everyone!

Some people just love to play with magnets and have a lot of them.If you are just like that and like to tinker a bit then I might have something for you.What magnets you use for the following experiment does not really matter but you should have 20 or 30 of identical properties.Can be disk magnets, block magnets or cubes, just not spheres ;)If you have a 3D printer you use it to make it fancy but a peice of wood, acrylic or such and a drill will do for round magnets.For cubes or flat packs you can make retaining walls on a flat surface.The experiment goes like this:I assume you already tried ways to combine your magnets to make them stronger, like stacking them up.But there is another way to really increase how strong they are combined.Start with one magnet at the center.Then like a ring add more magnets around it but with the oppisite side up.The created mounting solution is to prevent them flipping up and together, you want them as close as possible though.Add another ring and change the direction of the field again.Try this magnet, once all magnets are secured and compare the holding strenght to any other combo you tried so far.It will be much higher for the same amount of magnets.If you want to prevent the use of glue then try to create your mounting system with a really flat but strong enough bottom - this will then be the contact surface.Slightly reduced strength but you can re-use magnet with ease.But if you want to get a really strong one you need cube magnets.Like before you want to create some sort of grid, this time we go for a square.Start with cube in the center, facing north up.Leave enough space in your construction to add 8 more cubes around it - like on the face of a rubik's cube.Leave them empty for now !Add nother row, this time 16 to keep the square.Of course these one go with the south side facing up!Again one empty of 48 and then one last one with north side up with 196 magnets.Ok, to be fair, you wouldn't be able to pull it off a metal surface unless you used really tiny cubes, so if in doubt then go for just to 48 and leave the enter one out for now.Should be quite intense but similar to what any other shaped magnet would have done.Time to fill the voids!Add the cubes in the spce between the magnets so the north and south side face the magnets next to it!So basically sideways but in the correct orientation.You can then also add the center piece - try either orientation for that one ;)What happened now is that you forced the magnetic field lines to go up instead od for trying to go the easiest and shortest way to the next magnet.And "up" is where our magnetic surface would be, which provides the now overdue shortcut for the magnetic fields.Be amased how much stronger this version is and how much even 3x3x3 cubes would accomplish.With 10x10x10mm N52 magnets you might be able to use them support our wieght if you pull straight dwon from a horizontal surface...Ok, kidding, not just might, unless you are really big...One 10x10x10 might hold about 6kg.Stacked up a bit more but having 20 or stcked up would not be much stronger than 10.Even just 25 magnets with one in the center, one row of sideways orientated and one row with opposing field to the center one would be hard to remove from a steel surface.If we go with the imagined 6kg per magnet we could assume to get 25 x 6 = 150kg of holding power.Check you single magnet first then compare to the square of 25 ;)Consider using some plastic between magnet and surface so you can at least slide or pry it off if you have to.You can also combine magnets or a new one that has one side appear much stronger than the other.Meaning that for example on the north side it could hold 20kg while on the south side only 5.

Topic by Downunder35m 

Stair Ride

I had an idea about making going downstairs fun. You grab two handles, which are connected to a frame on the ceiling. As you move/fly downstairs, the handles scroll along the frame quickly, thus making the simple process of going downstairs fun. :) Absurd or do-able? Does anyone know how to make such a thing? 

Topic by yellowcat429   |  last reply

Building the Couchbike!

I am just starting an AMAZING project!  I am building the Couchbike.   Take a look at the original:  http://www.bikeforest.com/cb/index.php I am wanting any advice or experience or ideas about building strange bikes.  This is kind of like building a recumbent trike, so anyone who has experience with that particular thing please chime in.  It would be great to find someone to collaborate with.  I live in Portland, OR.  Don't worrry: I will definatly make a how to on this one!!  

Topic by kayperson 

what is...........?

Im stuck on what to get should I buy/make a gokart or should I buy a quad bike what will be more fun!!??

Question by rhys25690811234   |  last reply

Radioactive Americium 241

I have 4.4 µCi of Americium 241. Anything fun i can do with it? can i generate light or electricity or make it do something?

Topic by LinuxH4x0r   |  last reply

Skeleton Bicycle

This skeleton bicycle by Jud Turner looks like the result of an archaeological dig from TRON world. OK, it's not meant to be ridden, but quite bizarre and fun on its own. Link via gizmodo

Topic by fungus amungus   |  last reply

I need your help you guys!

Hey i had a cool idea about a shoe. Ok so here is my problem... i longboard and skateboard alot long distances, and my ankle and foot get tired from constant pushing down on the ground and then back up again. So i came up with a neat idea, what if i made a shoe or boot that i stick on my foot just when i am "pumping" or riding long distances and then it could come off. it would somehow have to have a spring system so that when i push down and then back it would coil up and then when i puched forward it would release hopefully cutting down the load on my ankle by a certain percent. any ideas? i have drawn a rough sketch...

Topic by TeacherOfTheWays   |  last reply

I am at a page to download an e-book, but cannot find a way to start the download. What am I missing?

The page URL is https://www.instructables.com/id/Fun-With-Adhesives/?download=ebook.

Question by eltonh1011   |  last reply

PTAM 3D Mapping?

Hi, I've been looking around for a cheap 3D scanning system for fun and I was wondering if anyone has tried out PTAM or PTAMM for 3D  scanning?  Can these programs record point cloud datasets and pass that info to other computer applications (like the Blender point cloud skinner script)  to convert the points into 3D models?  This could be a way to make a 3D scanner for like $10 or $20 (or free if you already have a camera). Here are a couple links for the info: PTAM PTAMM http://ewokrampage.wordpress.com/projects-using-ptam/ Blender Script I was thinking to try it out in a week or two when I have some free time but it'd be fun to know if anyone has some experience with it! Thanks

Topic by greenyouse   |  last reply


This is for all of you who still use cbs or are looking to install one for fun or work.  come on in and share ideas for mounting get ideas or just laugh at funny mounts.  i will put up more picks as i track down cars i have put them in.

Topic by abadfart   |  last reply

Photo Collection of Crazy Bikes

Check out this collection of choppers, recumbents, tall bikes, and many more oddball ways of pedaling around. Kudos to all the folks who made these and ride them on the streets. It looks like a lot of fun. 20 of the Freakiest Custom Bikes on the Road via treehugger

Topic by fungus amungus   |  last reply

If I want to collect rain water inside a light funnel (glass), how would the drainage system work?

 The existing flooring consists of  concrete slabs 230mm thick sitting on top of concrete beams 450mm thick, and the diameter on the bottom of the funnel is about 4 meters. Thank you for your help :)

Question by matisha23   |  last reply

Not as cute as Womble...but he comes close!

*see here and here if you don't know your Instructables history* This is my family's new-old Cushman electric vehicle. Yes, it's the same sort of thing you see reading parking meters downtown. Yay for tiny awesome cars that don't use gas! Any ideas for fun modifications? Plans so far include having a silly little decal printed for each side with an amber light on top so we look official, and mounting some 12V air horns in there to rattle the hubcaps off the jerks that pull out in front of it (We already mounted an electric ooga horn in my mom's Xebra SD, but air horns are so much more fun). Cardboard rockets that fire off of compressed air have also been proposed. He also has no name yet...we'll be working on that...

Topic by CameronSS   |  last reply

Rock or stone melting anyone here?

While writing some nonsense in the fun section I started to wonder... Rock or stone melting is certainly possible but how to do it properly? In India they went as far as melting stone chains... But that was ages ago and the know how is lost now. So how do you do it at home?

Question by Downunder35m   |  last reply

HELP. laser tvB gone.

Got an idea after  som beers.. how  bout puting a laser on a universal remote , or a tv B gone. and  a  sniper scope.. Is there a posibility? The  amount of  fun that  could give is insane. ... jupp i am evil..  Need som help from you beutyful geniuseses.. um  seses ..um.. ok ? 

Topic by bergen bang   |  last reply

Which wood would be good for making a crossbow??

I want to make a crossbow, not a proper one one, just a toy one so that I can have some fun. However, I'm not sure which wood would be best for the bendy bow bit. I'm located in England, and I would like an easily accessible wood to make it. 

Question by Crafty Dragon   |  last reply

after school program help

I am hopefully going to be designing an after school program for the spring semester. the age group is potentially 5- 11. but could be, if i so choose, only 9-11. I am trying to create a program that is exciting, fun, educational and of course, relatively cheap. The first idea i have is to build a model wind tunnel, then have the students design and build pinewood racers (with assistance of course), then we can test the drag in the wind tunnel and make adjustments, then race them. Giving the students the oppertunity to learn a little about wood working and also aerodynamics. I am also looking for suggestions for other projects that would meet the criteria of fun, educational and inexpensive. so if anyone has any ideas at all please feel free to share them. also if anyone is intereted in persuing the above project i am happy to supply links, as they are all ideas i have stolen. thank you Alec

Topic by alec868   |  last reply

How Can We Make The World A Little Bit Geekier? (Project HCWMTWALBG) (LOL)

Is it possible? Can it be? It's just like episode 44 of StarTrech season 2. (I'm lvl 102 in Conquer. and i have full +1 equips)(OMG) Lets have some fun and put in stupid ideas of how to make the world a little bit geekier.

Topic by kingghaffari   |  last reply

Any recommendations for a good multi tool?

 I've just recently gotten into building and creating mainly small, fun gadgets and time wasters, and I need a good multi tool. I'm willing to spend a decent amount of money, but I don't want a gold plated, hand crafted, thousand dollar work of art. Just want something useful and durable. Any suggestions? Thanks =)

Question by Zxccft   |  last reply

The Pulse Jet Bicycle that Goes up to 75 mph

Pulse jets are fun to watch and you can get an intro to making one with a jam jar. Make a big one and it can be incredibly freakin' loud. Mount it onto a bicycle like Robert Maddox did and you'll get speeds up to 75 mph as you blast your ears into loose bits of jelly. Link

Topic by fungus amungus   |  last reply

Has it been considered to make another Instructible Game?

I came across the game just recently. The PAYPAL link is not working anymore. So I asked a few members who I found cards from, If there are any plans to make a current set. No one knew. So I took my stats and made my own card. But my question sti is, Is there  a new set in the works? Rima

Question by SparkySolar   |  last reply

Science of Irrational Behavior

A lovely book review from The New Yorker. The book sounds like fun:In "Predictably Irrational: The Hidden Forces That Shape Our Decisions" (Harper; $25.95), Dan Ariely, a professor at M.I.T., offers a taxonomy of financial folly. His approach is empirical rather than historical or theoretical. In pursuit of his research, Ariely has served beer laced with vinegar, left plates full of dollar bills in dorm refrigerators, and asked undergraduates to fill out surveys while masturbating. He claims that his experiments, and others like them, reveal the underlying logic to our illogic. "Our irrational behaviors are neither random nor senseless -- they are systematic," he writes. "We all make the same types of mistakes over and over." So attached are we to certain kinds of errors, he contends, that we are incapable even of recognizing them as errors. Offered FREE shipping, we take it, even when it costs us.Another review from The NYTimes with an entirely different set of examples. This is definitely starting to sound like a fun read.

Topic by canida 

Ideas for motor drive mechanism on a so-far un-designed combat robot?

I am going to be soon thinking about designing a combat robot for fun. Probably won't be any real competing (unless it's among friends). I am however at a loss for what kind of motors/ where to get them to use for the driving mechanism so the bot can move. Any ides anybody? *Finding old cordless drills and removing the motors did come to mind

Question by An_Amateur622   |  last reply

Golf carts for racing

Hi, I'm new to this group but not to working on golf carts. I have been working on carts now for 15 years and I just started another venture in drag racing them. This is a lot of fun and hard work though but I really like the people in which I race around. If you are in SC area this May 2011 come join us for a weekend of racing and showing off your cart in Pageland SC. If anyone has questions about there cart feel free to ask!

Topic by andy4639   |  last reply

anyone intrested in an instructbl about making stairs, or chare experiences?

For work (carpentry) I make also staircases. very nice work.    Design (and plotting it all out) I do nowadays with sketchup, before it was working on big sheets of paper. As (for me) making an instructable is time consuming (but fun), better ask first if someone is intrested. And i would like to learn about other ways in design and aproach of staircases. I learned it myself, and seem to be staying within the same kind of construction.

Question by tekaka   |  last reply

Cheap and easy digital tachometer?

I convert engines from weedeaters, leaf blowers, etc. for use on large model airplanes.  I use an aftermarket electronic ignition on the engines.  The ignition uses a Hall effect sensor and a magnet to trigger the CDI ignition.  I would like to build a digital tachometer that would use that same trigger.  They sell them for $25.00, but I thought it would be fun, and cheaper, to make one (or several) myself. Can anyone help with a circuit and parts list? Thanks!! vettebob

Topic by vettebob   |  last reply

Secret To Slithering Is In The Scales

Secret To Slithering Is In The ScalesTalk of the Nation, June 12, 2009 -- How do snakes slither on smooth surfaces? Mechanical engineer David Hu, of Georgia Tech, filmed snakes slithering up inclines, outfitted them in jackets and photographed them through jello to better understand snake locomotion. The researchers published the study in the early edition of the Proceedings of the National Academy of Sciences this week.NPR's video that accompanies the article has some amazingly fun shots of snakes slithering in place on surfaces too smooth for them get any traction.

Topic by ewilhelm   |  last reply

What to with a couple Old Windsurfers? Maybe Catamaran?

I have a couple windsurfers I am trying to come up with ideas of something fun to do with. I tried to make one into a small sailboat with a fixed boat for a friend who was unable to learn to windsurf but the mast was too heavy and flipped over. I am thinking of putting a pvc pipe where the mast went and making a smaller sail. Has anyone tried to make a catamaran out of two windsurfers? Or maybe a trimaran with the windsurf board in the middle?

Topic by volleybiggs   |  last reply

Machine that can shape water

The National Maritime Research Institute of Japan has a machine that can create shapes in the water such as hearts and stars. That's just the small one. The larger machine can make much bigger collisions between waves. There's some research around safety here to merit such a large setup, but I'm just happy with the splashes and the over-the-top reactions of the reporters. Always fun to see them shout "sugoi!" and "waaaaaaa!" over and over. via Neatorama research institute Uploaded by hatoyamafandom. - More video blogs and vloggers.

Topic by fungus amungus   |  last reply