knowledge about wire which use in solenoid?

I want to make a solenoid & i am confused because i don't know that which type of wire is use which no or ohm . Actually i have a project in which I want to produce electricity  with the help of magnets or solenoid . So can u plz guide me this matter very gently  Thank You Ashish Dhiman

Question by adhiman2   |  last reply


Repulsine - the great mystery...

Even before the repulsine saw some attention during WW2 there were sightings of what we know call the classic UFO shape.Be it in Austria, Poland or other places in Europe, people reported weird disk like thing with a dome flying around.What leaked in images and documents after the war shoed that the repulsine looked basically identical to what people saw as a UFO in the sky over big parts of Europe.Then again, the repulsine appearently never made it a usable stage, same for most jet fighters at the time and still they flew around...If we now just take it for granted that actual test flights really happened back then you might wonder why we did not see any after the war anymore.For most critics it is a simple sign of facts and "confirms" that the replusine might have been a nice idea but never anything that really left the ground.As said, I often like to dig deeper and in this case the digging took far more years than what I planned on.I can not provide any solid proof for the following but I am sure even a sceptic will come to similar conclusions after reading it.Try to find some "eye witness" reports from people who saw the so called "Roswell UFO".Yes the one that made Area51 so secret and famous...Reports can be boiled down to some essential features of the hull, for those who saw it proof that it is alien.Three distinct round shpes on the underside, like you add the bottom of an egg to a round disk.Said disc of the bottom was also shaped like a wing, or the flying disk toys our kids like to play with.On the other side the shape grew up like a half shphere with an added cone or round top on it.On these area they claimed to have see engine outlets or similar and appearently the top cone was spinning in another direction than the rest of the UFO.Now I am no expert for Roswell but if I leave area and time out then I could have been fooled to think these people discribed exactly the same thing people saw a few year eariel flying over Europe.The Roswell UFO was not from another world, just stolen from the looser of a really bad war.What was seen was a working Repulsine, be it an original or something the US created from the 5 prototypes that disappeared after the war.Ha, ha, good one, then why don't we saw them flying after this anymore?Well, for starters it was a testflight gone wrong.Presumable it was planned to be limited to Area51 but the pilot lost control.Considering the Nazies appearently did their best to kill everyone involved in the project before the aliies arrived it is no big surprise.What that test flight would have shown is the impossible manouvers people already witnessed over Europe.90° or more turns at full speed instead of making a turn like a plane, sudden changes in alitude as well as accelleration on a level that makes even modern rockets blush.And if it really was the first bigger testflight they did it explains the big secrecy about the Roswell incident and what followed and created Area51 as we knew it.A "weapon" capable of these things would mean total dominance and options to impove planes and more.So why did they not even do that - or did they?The repulsine was created based on what we call today fringe- or pseudo- sience.If there is only one peroson, or a few that can even understand the claimed working principles that it can't be science as we know it.So, lets take a look what things were already heavily used in the repulsine that "we" claim to have developed or discovered decades later.Coanda effect.When air travels over a surface then it will follow the surface.You can try this with paper strips and blowing on them as well as a stream of water and some shaped objects.Long known but never found any real use until the military picked it up.For example air inlets were then developed to utilise the coanda effect.Remember how a lot of them these days look like a ducted fan housing?The round and slightly conical shape of the inlet will actually act like an airfoil and provide lift - of pulls forward in the direction of the air flow direction of the engine.I supercars we use it to create more downforce and better aerodynamics.Venturi effect.Again a very old one but funny enough also a major factor to make a jet engine work.Tesla turbine.In the Repulsine the rotating copper disks acted like a huge Tesla turbine by using a similar effect.The space between the disks got smaller and smaller towards the outer perimiter.Due to the fast rotation the molecules were accelerated and this created a partial vacuum.We use these principles today for specail vacuum pumps but also in military applications.Harmonics.Without harmonics and resonance the Repulsine would have been impossible.And at a first glance it seems we never made any use from that bit of the machine.Then why do we design exhaust systems in such a way than already the extractors ensure a pump like action and controlled backflow?The sound a good exhaust makes is also based on using the harmonics created by the explosions in the cylinders and expanding gasses.We learned that it is far more efficient to use harmonics and resonance in an exhaust system from somehwere ;)Plasma.The repulsine was said to have emitted a bright glow during certain movements or speeds.To create plasma we need a lot of energy, not so much however if the plasma is a by-product anyways.We learned that a high enough voltage differencial in a vacuum can create a nice plasma arc.From there things like analog TV monitors were created.But we never made anything that creates plasma for any use in an atmosphere.Well, unless you start to check supersonic rocket engines and other things.The working principle is very, very close here in some applications like the ramjet.Vortex energy.Today we see all vortex energy stuff as a free energy scam or at best a waste of time.But from the inlet to the outlet the entire Repulsine utilised what we now know as vortex energy, vortex math and so on.The air is twisted and spun around so many times that it is hard to keep track - but it always happened in a harmonic and resonant fashion.In some way this is implepemented in very expensive cars to keep the ventilation system almost silent even at full power.If you ever take an expensive car apart you might wonder why the air system is not as smooth and straight as you would have expected to get this silence ;)There is more but the list would become too long ;)So, if the repulsine was really that great then why was it taken apart to only utilise fractions of it in other things?If you have something really great that combines a lot of things then no one would suspect if you "developed or discovered" some of it in other projects.And to give you a very bad comparison for the other way around:If you know how to combine a petrol engine with some long blades then you could fly!I know, we did that already but you get the point.I can give you a motor and blades but that would not mean you could build a plane or even helicopter!At that time and still today something like a Repulsine would upset the "balance of power".If claims are correct then the engines of the repulsine were only required to provide the enrgy for directional changes or speed but it flew on "free energy" as the main engine system.In lame words like a jumbo jet that only needs a small engine for the hydraulics and electricity...Another big problem is the replication even if you would have a complete and working model to disect.You see most parts were brazed or welded as screw or rivets would have been problematic in certain areas.Other parts like the Kudo horn like intake systems would even today pose a challenge if you want to replicate them 100% correct.And if your understanding of science and physics greatly differs from those who originally created the thing...If your understanding tells you a dice has 6 sides (we all know that) but in my understanding it would have 16 then you would never understand how my dice rolls ;)Bringing true free energy of any form into this world is only allowed if someone can still make good money from it.Just check solar cells and wind generators - we all can have them but our providers make sure they have enough of them as well ;)Will we ever see a fully working Repulsine again?Of course !Some people like old cars, some collect old planes or old machines and tools.A great project for people in the right trades is always to build thier own little steam engine.So to say as a reminder of how it all started.Same will happen with the Repulsine as the first really utilised free energy machine the world had.The war and killings were not what really scared the world.This happened and will happen over and over again to various extends.Really scary was once certain people realised what might happen if over there the war would end with a victory and people would have time to develop for peaceful things instead.Without the war or this idiot Hitler a peaceful war would have taken over the world by storm.Those making sure we know nothing else but paying for our fuel and energy would have lost their monoply.Times change though...We destroyed our world with our needs for fossil fuels and electricity.What is left we destroy by chopping it down, digging it out or just by building new estates on prime farm land.People are now more desperate then ever to find ways to reduce their energy bills or enviromental impact.Otherwise Google wouldn't make billions on all the fake free energy videos out there.But what would it take to recreate the Repulsine?The person able to come up with the understanding of at least attempting to build one again would need to have certain qualifications and titles.He or she would hold a Nodel price for completing some of our known laws of physics or for finding some of the still missing ones.It would be a quite hard to understand and like person too, maybe even highly autistic.The person would also have an addiction like need to complete things, add the missing bits.And of course a totallydifferent understanding on how nature and the universe work.David T. from England is such a person, or at least the closest mankind can offer so far.He can see math in his head as shapes and images.Complex math problems appear to him like developing landscapes in high detail.He even learned to speak icelandic fluently within 7 days!!Imagine such a person would develop an interest in the old pioneers like Schuberger, Newman, Tesla and so on?Where we normal people fail to see any relevance or connection a guy like David would be able to literally see how all these inventions and ideas connect.He would be able to SEE the math behind it!Knowing how something was supposed to work and combining what is known through patents, drawing, videos or reports would enable such a person to make conclusions.For example where we might just see a nice pattern when we throw a stone into an undsturbed lake such a person would also already know and see the corresponding math the created the waves and why they were created exactly like this.Assuming David has no real interest in such things, then is it possible others already try?Sadly yes and even worse they do it with kids.Learning methods that are different can bring great results.For example while we use a calculator for big numbers some kids attend really strict and performance based classes to do this with an ancient abacus!After years of hard and often painful training they are able to it with a small abacus that only has a single row of discs.Shortly after they graduate to a virtual abacus - they only twitch their fingers in the same motions they would use on the real thing, but the disks and rods are all just visualised in their heads.That however is all meant as an improvement and the kids do it because they want to and not because they are forced to.Like learning to be a chess champion before even being old enough to work...In china however we have a very selective education program.Kids are not just trained slightly different to our kids but also closely monitored on their progress.As soon as one stands out for some skill it is subject to examination.Being well above average here means it is an opportunity for the kid and the parents - on paper at least.We in the western world would see it as a viscious circle though.Over the years china developed not only a better understanding of how these special kids brains actuall do their things but also how to create tests for this purpose.What looks like impossible or nonsense to most kids will trigger a scecific response and understand in those that are special.We would create something that allows parents to know early on where the kid has really good skills and what activities should be promoted.In china though the parents receive a nicer flat or some additional income while kids are send to a far away school.Again we would refer to such a school more as a boot camp.Discipline is at least on military levels, same is the punishment system.In most cases families are not reunited for many years, phone or even video calls only happen in the rare times when western TV crews are allowed a sneak peak.I just say: If a kid would see the parents often enough then it would not only know what to talk about but also be happy to talk to them - this however you won't see.It is like they talk to some distant uncle or such.What is really scary though is how these kids are trained to see their purpose and how important it is to be the best in what they do.Imagine you lost your kid at an early age and the only thing you got over the year was letters from the government saying how well it is doing and that you can be proud of it.Then it graduates and you are not even allowed to be there on that day...After that the kid is gone for good, you get a new flat and your proud kid supports you with some nice extra income.You don't get to know where it is working, what it is doing or if it might just be attending some university.By any standards these graduated kids can be seen as a great number of genius young people.Math, music, languages, science, you name it and they will have the experts aged below 20 for it.But what do they do once school is finnished and life starts?So far no reporter or family was able to figure it out.Means they don't appear in some high profile company, they don't start a successful business or teach at any public or private school.I leave it up to your imagination where thausands of kids find secret employment once they graduated....If, at least in theory we could be able to understand all these old technologies then why don't we at least try?Everyone has a goal, some desire a happy family and nice house, other need fame or just money to be happy.With that comes greed.You might have a really nice car but that does not mean you would give to some neighbour for a trip.Even if it just a nice rose garden, you might not want to share the views with anyone.This is true on all levels and we created a term for it "Need to know basis".If you just operate a press in a factory then you don't need to know when or what the next job is that comes for your press.You will know when it arrives and can check the documents attached.You don't need to know that your council is expanding and it is only seen as a courtesy to let you know on some notice board or in the local newspaper.And even our government does the same.What we do from the first days of our new baby we do on all other levels in the same way.What the baby does not need to know we won't tell or show.But we provide all the littly anklebiter needs to develop and be happy.Changing nappies, feeding, proving comfort when sick or having a nightmare.Later we teach language and other skills like walking.It goes on as you know...Humanity as a whole is like a little kid as well.If we would know all the little, dirty secrets then we would riot and go mad.Things that are of no concern are nothing we need to worry about, so we don't get to know them either.Knowing how build the latest fighter jets is seen as a thing that would give a possible enemy an advantage.Makes a lot of sense to everyone as these things might have to protect us one day.The questions that remain are:If humainty is a child, then how old are we now or when do we graduate?If there is a collection of secret and old knowledge then who owns and controls it?What would it take to force the release of all the things people actually created for a better world and not to be locked away?As funny as it might sound but one answer to all these questions would be to do nice orund trip in your Repulsine.Fly over ever single country in this world.Let their guided missle and what not chase you and once enough show then how quickly you can make a 180° turn to get behind them.So called unimportant countries might ignore you and the people only enjoy a nice show.Those powerful enough will fear you and think it was "the other side" showing their superiority.Once done with your round they all will have to realise there is a new power that is at the helm now: Knowledge and understanding.No more secrets, a repulsine for everyone who wants the plans to build one.A new world would start.Ever thought about that when wondering why all these "Aliens" we see in their ships in our skies never land to say hello ? ;)Even if they would be Aliens and not just some human pilot in some experimental craft:Shouldn't this demonstration of absolute power and control without any violence tell us something?The Repulsine need to come back to life to end all this UFO nonsense and Alien theories out there.You hear the sounds, see the ligh show and impossible abilities.And suddenly most if not all UFO sightings would have a common factor again.Just because the Repulsine is claimed to be lost and that it never actually worked despite film evidence showing the opposite does not mean there is no one using the technology.A working Repulsine available to everyone would also kill the doubt on so many other old inventors and "fringe" scientists.Science and physics would need to be redifined as would be able to find a lot of missing links.I know there is not only a lot of people out there trying to get what they can about the Repulsine but also that there are others who try to prevent this.You have a really easy time getting permission examine some old and histrically important artefact from a museum than getting just a hands on approch for what remains of the Repulsine in various places.Not even decent 3D scans will be allowed.Anything like just getting a tiny pipe cam inside is rejected with the excuse it could cause damage.If the thing is a hoax and never worked then why would it be so important to never touch or move it? ;)I recently got word that two of the remaining Repulsine "artefacts" were examined by the same group of "scientists".This happened in the late 80's and said scientists were claimed to have had acces to a collection of spare parts for the original Repulsine that was lost after the war.A private collector was also mentioned who denied all access but what he had in a secure storage facility appearently disappeared shortly after his refusal.Putting all the dots and hints together it would mean that someone in the late 80's was able to get literally everything that is left of the project in his hands.Those who claimed to have seen these scientists working on the Repulsine leftovers claim they used top notch technology to do so, including 3D scanners - and those were basically imossible to get back then for any uni out there...The laptops used were said to use touchscreens and were connected to all sorts of equippment.And they did it in almost total silence, like a group who studied a performance many times and knew exactly what do when and where without the need of many words.Professional in examining something unknown all all possible levels.I was unable to get any information on these scientist or who they worked for.But if you are one of them and readin this then I would love to hear from you!

Topic by Downunder35m   |  last reply


what is science

Science is having knowledge in all and it is connected by technology    technology is useful application of scientific knowledge.  it is slogan !    knowledge is power but most better than imagination.

Topic by rodniactive   |  last reply


High school students' lack of knowledge regarding 3D printers.

Has anyone else come upon the severe lack of knowledge about 3D printers by high school students, and possibly people in general as well? Today, my teacher announced to my art class that: "Some architects will be coming in to show us their 3D printer that they built". Then, practically every student started to say things such as: "what the hell is that?". The teacher then said that: "it's like a printer, but it prints things out in 3D". After that, one student asked: "so it like prints stuff out on paper in 3D?" So the teacher replied: "no, it prints objects out in 3D". Then, the same student asked again: "so it prints stuff out onto paper in 3D.....?". It went on like this for about 5 minutes, until the teacher got tired of explaining from her limited knowledge of 3D printers. After the teacher managed to end the conversation, I heard murmurs from the others saying things like: "I don't get it..?" and "That doesn't make any sense..". Has anyone else encountered this? (not that I'm an expert on 3D printers or anything..) Thanks -Me

Topic by tqwerty   |  last reply


Any objections to my battery charging solution? Answered

I bought some cheap 360 battery packs on the internet and big surprise they don't work.  The problem is that the built in charging circuit charges the packs to around 2.26v when my controller wont turn on until closer to 2.5v.  My idea is to use the indicating LED (that came as part of the pack) that has a forward voltage of around 2v to drop the 5v charging voltage down to 3v and charge the packs to that voltage.  Theoretically when the packs reach 3v the LED will not be able to sustain the forward voltage and will turn off stopping current flow to the batteries and thus stop charging.  I have a lot of knowledge about electronics, however my knowledge of batteries and their sensitivities is just about nill so I thought I'd ask here before I rig this together and get an idea of the likelihood of the batteries blowing up.  I've attached an image of the proposed circuit any knowledge would be greatly appreciated.

Question by double_g   |  last reply


Meet with New Guy:

Warm wishes to Everyone, As I am new here I have no knowledge about this forum, so I would like to know more and also want to communicate with the other members of this forum. Thanks and Regards, Damacio Huang

Topic by DamacioHuang   |  last reply


Anomalous Production of Ozone at a Catalyst Surface?

Anomalous Production of Ozone at a Catalyst Surface?   Hi, I'm kinda jumping in here, so I hope I'm not breaking forum rules . . . While experimenting some years ago, I produced ozone by accident and apparently by the action of an electrical current in a Pt/Ir alloy wire. I haven't been able to reproduce the effect due to a lack of resources, but I believe that it, if it *is* reproducible, might be an 'improved' method for the synthesis of ozone. I should say I *did* try to reproduce the effect but a lack of knowledge of the physics of the PGMs meant my efforts came to naught. But if there is someone out there  who is knowledgeable in the field of heterogeneous oxidation catalysis, I'd love to hear from them . . . Thank you

Topic by HansAs   |  last reply


Beginner wanting to build a 3d printer

Hello, I am an absolute beginner to building machines and my goal is to build a 3d printer. I was thinking of purchasing a kit or following one of the instructables here, but what skills or knowledge would I need to acquire before I  attempt to build one? Any advice would be appreciated.

Topic by Calcgal   |  last reply


1 watt Frequency Doubled Violet Laser

I want to make a 1 watt violet laser, by using a 1 watt 808 nm laser and channeling the laser through a KTP crystal. Judging from my humble knowledge of second harmonic generation, That should create a 1 watt violet laser beam. Correct?

Topic by Nexoid   |  last reply


Circuitry (Electronics) Help/Books

I am looking to expand my electronics knowledge. I already know the basics (and a bit more), so please no suggestions for the basics. I know enough to build my own basic custom circuits. I am very knowledgeable about the Arduino (I use it practically every-day). I know how to use resistors, capacitors, transistors, most diodes (LED, Photo-resistor, current-blocking, one way, zener, etc.), and much more. I am self-taught, but want to further my education. I am VERY interested in robotics (I plan to work in aerospace engineering when I'm older), if that helps any. I am in need of good books to read on. I've gone through most of the projects in Forrest M Mim's books that I got in a kit from radioshack. I really would prefer some eBooks, though. Free is good, but I'll pay if it is necessary. Thanks! (:

Topic by freethetech   |  last reply


What can be cut with a 10W IR laser? Answered

I can get a 10W IR laser diode for real cheap and I want to know what I could cut with it. If anyone has any experience, please share your knowledge. I am especially interested in how tick wood can I cut and if there are any metals (and what thickness)  can be cut. Thanks in advance!

Question by ptkrf   |  last reply


Making a car purr- roar

Well this one is not that hard you just need to take off the muffler and of course a nice engine helps. I suggest if anyone wants to win this that has basic knowledge of cars and has acces to a torch-welder and saw should do this instructable. Any other suggestions for the person who decide to take this task are what this post is for. Enjoy Duck-lemon

Topic by duck-lemon   |  last reply


would it be possible to bulk up gold flake for scrap ? Answered

Would it be possible to bulk up gold leaf/flake of a high purity with a resin/hardener to scrap ? as the jeweller will take a filing to test  would the bulking agent be minimal to detect  because it not being an alloy/metal ? love a bit of knowledge about this before i buy 30 kg of gold flake/leaf ;-P thanks   MAGIXO

Question by magixo   |  last reply


making a weedeater bike? Answered

The link below is a clamp that holds the engine on a weedeater bike. the good thing about this clamp is that you dont have to permanantly keep the motor fixed on the rear tire. you can cycle on flat roads and when nearing uphill, you can engage the motor with just one push of the clamp handle.    can someone with a mechanical knowledge make a video on how to make this clamp https://www.youtube.com/watch?v=dZCfYu7e730

Question by modtrend   |  last reply


Making a car purr- roar

Well this one is not that hard you just need to take off the muffler and of course a nice engine helps. I suggest if anyone wants to win this that has basic knowledge of cars and has acces to a torch-welder and saw should do this instructable. Any other suggestions for the person who decide to take this task are what this post is for. Enjoy Duck-lemon

Topic by duck-lemon 


Reid and Prince screw driver design?

I have worked in the automobile repair industry for nearly 50 years and to the best of my knowledge, the reid and prince screw driver was originally designed and used by the european manufacturers. I state this in the form of a question and would like to know for sure.   I have found the posidrive design is mostly used on mechanical items(under the hood) and the standard philips is typically used oninterior and exterior trim  

Question by mad mech   |  last reply


How would I make a coat with armored plates on/in it. At a very low cost?

I happen to be one of those people who loves making things with my own hands rather than buy it, and who possibly has too much free time... Anyway, I am currently designing an armored coat, but lack the resources to use something like Cut Tex Pro fabric or something else ridiculously expensive. Because of this, I have resorted to using thin fiberglass plates in the coat; although due to my lack of knowledge on embedding armored plates into clothes, and on what sizes and shapes each plate should have varying on each choice, (knowledge is 99% experience, and 1% brain power), I'm not sure what would be more effective, external or internal plates. I would appreciate all opinions - (Trolls excluded) - on which choice would be most efficient, simple, or even just low cost; suggestions for alternative materials that offer a possibility of working better would also be welcome.  Thanks

Question by jgdabble   |  last reply


230V 3 Phase Motor on 240V Single Phase Supply

Hi, I am a ME with very limited knowledge on electrical side of the world. I have ordered a electric motor from Germany with 240 V assuming it will be single phase. The motor has rocked up with 230 V winding but 3phase connections. Is there any chance I can connect this motor to our single phase supply???  Any device which will help to use this motor. Please help.

Question by NasirA9   |  last reply


how to make home made foam cutter for slicing foam Answered

I dont have much electric knowledge ,but i have to make home made electric foam cutter for my kid ( he has to make some school project ) by cutting / slicing foam . i have pen type soldering iron / room heater etc. shall i made foam cutter from it , can i make room heater coil directly connect to steel wire to make it hot.please guide me ,it is very urgent .?

Question by atuldd44   |  last reply


is there any way to make your own 5vdc~ 25 Amp power supply?

I don't have a 5vdc~ 25 Amp power supply unit. I need one for my Linksys router. Just asking if it was possible to build your own. Besides i get to learn about volt, Amps and watt , that's supposing i don't fry my self by electrocution. Can any one help my, no...! Not to electrocute my self. to make  or build my own 5vdc~ 25Amp power supply. Your expertise will be of knowledge well past on. TNX

Question by bow21   |  last reply


Fixing '98 Electronic GM Automatic Transmission 4L60 setting code 1870?

 I have a '98 Blazer with a 4L60 Automatic Transmission that shifts rough after it warms up  into second gear and sometimes third when leaving a red light or stop sign. After I stop the vechicle for 10 minutes or so, it shifts smooth until it warms up again.  I was told not enough transmission fuild was flowing threw a checkball inside the trans? I was hoping to fix it without rebuilding it or a high price tag. Anyone have any knowledge on this issue?

Question by BUBBA2010   |  last reply


DIY Tadpole Cargo Tricycles Plans

Hi, Does anyone know where I can get complete, easy to follow plans for building a cargo bike similar to the Haley bikes out of Oregon? I am not the handiest person nor do I have a shop, welder etc. but I can have some of this done, with good plans.  There are good plans on this site but they seem  to assume more technical knowledge then I have or at least it seems that way at this point in my search. I have been unable to find plans for sale that are for front load cargo tadpole tricycles. Any info would be appreciated. 62Learner

Topic by 62learner   |  last reply


Terrible tragedy. Grant Thompson has passed away.

I don't know how to post this, but maker extraordinaire, Grant Thompson, The King of Random, has passed away from a paragliding accident.I, personally, have learned so much from his wealth of knowledge over the years. A friend showed me a video of his 5 years ago and for years, I remember waiting anxiously for him to post a new video.One of the first people and possibly the most influential people in the online maker community, all around the world. Thank you Grant. Terrible tragedy.RIP.

Topic by Yonatan24   |  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


HHO powered car

One of my friends asked for my help for a project for his school expo. He wants to run a car on water and I have told him not to be too optimistic. when I googled it all I found was that it was not possible(as of now), but no other detail. I did stumble upon an old episode of myth busters in which they came to the conclusion that a car can run on hydrogen, but they were unable to provide enough hydrogen from their electrolysis setup, however, I noticed that the HHO generator created by king of random produces way more gas then theirs. so I wanted to know your opinion and knowledge on this matter and whether this can work or not.  

Topic by Ahtasham Ahmad Mohtashim   |  last reply


What kind of power supply for this LED array?

Hi, My grow light failed on me recently. It's a series circuit of perhaps 3W diodes.  LED array pic: http://i.imgur.com/YQfJSrZ.jpg There are 18 diodes, and the colors are:  10 x 660nm (red), 3 x 630nm (red), 1 x 610nm (orange), 1 x 520nm (green), 1 x 430nm(blue), 2 x 450nm (blue), Total: 18 pieces Driver: http://i.imgur.com/Fpt2x4q.jpg I'm not really that knowledgeable about electronics, so what specs should I look for when buying a replacement driver? Is it as simple as getting something that is 8-12W like in the image, or is there more to it than that? Thanks.     

Topic by horsebones   |  last reply


3D cutter or mechanism to hold various power tools controlled via computer

I'm looking for a project or site where I can find knowledge on building a rig to enable the carving of an item from a top down point of view.I've seen images of people's engraving setup's which is close to what I'd like, but I need it to be more. As a simple example of what I'd like to do is if I had a cube block of wood, use this rig to say carve/shape a pyramid. I'd write myself a program to control various motors based on some sort of data that held the model of the pyramid. Thanks.

Question by KennethS154   |  last reply


Why does an internal combustion engine have to run on liquid fuel?

I have a full knowledge of how petrol and diesel engines work so I know that it is far easier to get a liquid fuel into the combustion space than it would be a solid fuel. However this does not mean that that it would be impossible to introduce a solid chemical fuel broken down into a light powder. The problems would be to identify a suitable fuel and its costs. It would obviously be necessary to dispose of combustion by-products with minimal polluting effects. Does anyone have thoughts on this or do you think its a non starter? I would appreciate any thoughts. Bean

Question by beanjay1   |  last reply


Can anyone help me with metal casting?

I have been working with my friend, setting up a small IT business in our local area providing some software but mainly hardware. Now that I have a furnace and it can melt aluminium my friend has asked me to cast a case for his computers. He said that he will produce a wooden copy of what he would like it to look like, then give it to me to cast. I am wondering how I can convert the wooden copy into a wax copy so that I can continue from my own knowledge. Any help would be greatly appreciated. Thomas

Question by thomas9666   |  last reply


Framing longer walls for garage/shed.

Most DIY sites give instructions using 8ft or common lengths available from any local supplier illustrating walls using standard lengths. I want to make a garage 16ft x 22ft and do not know how to span across the 22ft section to make a full length wall using more than one board. One to two windows per wall and one exterior door with a gambrel roof, I thought this would be relatively easy but apparently not for a novice carpenter. I just finished pouring my own concrete slab thinking the internet provided free plans would be enough but I am stalled without better knowledge.

Question by netlink   |  last reply


Getting more power from a quartz clock movement

Using a transistor to boost the output from a quartz clock to drive a larger motor in steps. Is the idea sound what would I need? Having read a couple of instructables on equitorial drives, I found myself wondering why you couldn't just use a quartz clock movement to drive one? They don't produce much torque is the answer to that one. Why not? I took one appart to find out. The gear chain is very flimsy moulded polyethylene, or maybe nylon. the power comes from a tiny armature that makes 1 turn a second in 2 pulses the magnetic pulses are provided by a little cuircit board with the quartz ossilator on it. Here endeth my actual knowledge. My knowledge of electronics is minimal give me a good set of instructions and I can build it (unless its a joule thief but thats a different matter) but don't ask me how it works. My limited understanding of a transistor is if you put a small current or voltage across 2 pins you can get a bigger current or voltage to flow across one of them and the third, something like a relay. I was thinking if I took the out put from the quartz cuircuit that provides the magnetic pulses and used it to trigger a transistor to pulse a higher voltage and current through a small 3 pole motor kicking it around 1 pole per pulse. The motor I have a salvaged and rebuilt in an earlier instructable runs on 3V and draws 0.2A when not under load. the largest motor I have to hand is a big 7 pole one designed to power model planes or cars draws up to 15A on 7.2V the timer cuircuit for that one needed 3 Mosfet's in parralle so I'm guessing thats not possible.

Topic by Stan1y 


Full Spectrum Lasers

Hey Everyone, Recently I have been looking at different C02 laser manufacturers to see if there was anything that was affordable but still of professional quality, and I stumbled accross Full Spectrum Lasers.  I am wondering if anyone on the site has any experience with their products and their customer service. The reason I am asking is because their prices almost seem too low; comparable Epilog lasers seem to cost at least twice as much.  I know that Epilog is probably one of the biggest names in the industry and have apparently been around the longest, but I don't see how that alone could cause such a price difference. So basically, if any of you have had good or bad experiences with Full Spectrum your knowledge would be greatly appreciated. Nathanael Scheffler

Topic by NathanaelScheffler 


Help! Thermo Electric Generator

Just wondering if any of you knowledgable folk can help me out. Of late I have experimenting with solar cells and energy production. I have been calculating some interesting results, many of which due to the use of lenses, magnification and mirrors etc. Alas this has led to more that on fried solar cell due to the temperatures im dealing with. Is there any practical way to obtain/construct a Thermo electric generator as pictured? I have spent some time with my friend Google, leaving me with little more than the notion that perhaps this technology is out of reach of the home experimentor. Think giant light cannon that can melt pennies. How can I harness this heat directly as apposed to, going the boiler/steam powered engine method?

Topic by Lftndbt   |  last reply


Converting a .dwg into a .stl for 3D printing a house design (Converting to watertight mesh/ 3d volume)

Hey you guys,I am hoping to use the powers of a crowd to find a quick answer to my problem. I have the architectural Design (.dwg) of a given house (simple model for comparison attached). I need to convert this into a .stl file, preferrably using Fusion360 or Autocad. (newest Version)I understand that the type of the walls and roof is not a 3D volumetric type or a watertight mesh, so the question is how to get there. (Also: of what type of "structure" are these walls - I mean .. they are 3D?)I am an electronics engineer by training, so my CAD knowledge is rather restricted to PCB design. I would be pleased if you can help me out with this, so I can get back to those PCB's :)Thank you guys a lot!lusch

Question by lusch   |  last reply


using glow stick fluid outside the stick help

Alright need some help. im wanting to fill a bunch of test tubes with the fluid from glow sticks for my halloween costume this year. but for some reason after removing the fluid from the glow sticks and putting it in the tubes it does not stay lit for very long at all. im talking anywhere from 3-4 mins to 60 seconds. i have tried breaking the inner container before and after putting it into the test tube, and for some reason mixing the two after seems to have a longer life. moving and shaking the test tubes does cause the mix to glow for less time and im going to be wearing them so i cant have this. does any one have any kind of knowledge if this area? i could really use your help. any ideas on how to fix the life span?

Topic by pearce606   |  last reply


Best "HHO Electrolyte" Versus "Conditioned Water" and Why you think it is ?

I eared many things about hho generator but some say it is better to use "solution recipes" (electrolyte) instead of  "conditioned distilled water" . I'd like to know more about conditioning distilled water . I need your help on this one ! I plan to use rectified high voltage for 2 dry cells . 8" by 8" 16 plates each using microwave parts but I can't figure the minimal input if coming form  12 volts batteries and car alternator . I bet I'll need a converter from car DC to H/V transformer and I have no idea how to make it a reality Use the best of your knowledge to answer !!! Instructive and useful links are welcome ... Thanks !

Question by wiseboy   |  last reply


Does anyone know of a compound slide for a metal lathe which is also capable of precise ball turning?

I have recently become interested in machining metal, and I am now looking at lathes to buy. However, the lathe I want does not come with a compound slide, which I consider to be a necessity for the types of things I want to make. Another necessity is a ball turner. Is there a compound slide with ball turning capability? If possible, I would like it to be able to cut convex and concave and also to use a small winding handle to control it's angle (like it uses to control cutting depth and position). I have considered making my own, as I know I am unlikely to find something that exact, but milling isn't an option - I don't have access to a mill or the knowledge of how to use one. I am willing to accept a quote for a custom made one, although my budget is limited (I'm 15).

Question by scarabeetle101   |  last reply


Coanda effect in conjuction with Venturi effect !?

I am still working on my project to create relatively accurate model of a Repulsine. No, I am not one of those free energy nut balls, just curious in old tech ;) As part of my research I came across some statements in regards to lost pieces of the Repulsine. The last remaining model still exists in Austria but noone seems to have to clue what the missing parts looked like. I think the missing parts are a system of nozzles, diverters and a secondary hull - forming a similar system like the Coanda plane engine. There are lots of people still out there tinkering with Coanda lifting devices and trying to get them working. Is there anyone here doing it ??? Would like to exchange some knowledge, tipps, designs and so on. Short term goal is to make working Coand engine with enough thrust / lift to be used at a later stage for a working Coanda plane model. Long term goal to modify it all to incorporate into the Repulsine.

Topic by Downunder35m   |  last reply


How to grow a crystals with gypsum and other materials?

Dear: Instructables Just to let you know I am limited to materials in my house. I want to grow a crystal with plaster like plaster of Paris but I am running into a few problems. I know that Gypsum or plaster of Paris is already a crystal but it doesn't have the necessary hardness I want. I want It to have a hardness of a minimum of 6 on the Mohs's scale. I also am limited to chemistry knowledge. I've been trying all day to design a crystal with the specifications I want but I've been having trouble trying to draw a Lewis dot diagram for plaster of Paris. I am not that good at drawing Lewis dot diagrams unfortunately. Here are some materials in my house I think I could use to incorporate with the homemade crystals. Acetone Potassium Chloride Sugar Baking Soda Potassium Nitrate and more... Can I have some help please? Thank you. From: Noah

Topic by nschreiber0813   |  last reply


How do I use a transistor to up the power of a PIR output?

Hi, I need help. You see the street I live in has more cats than, well the musical cats,  and seeing as my garden seems to be they're preferred  choice for going to the toilet, I decided to build a motion sensing water sprayer. So off to Amazon I went and purchased some PIR sensors, a solar pump with a DC connection, bread boards wires and batteries and chucked it all together. Now the sensor will light an LED no problem but when I switch in the pump I get nothing. I read on tinternet that transistors can be used to up the juice but I was already far beyond my knowledge of circuits, components and the like. I even tried looking at sketches of PIR sensors to transistors, but after weeks of trying I'm no closer and have nothing to show for it but a headache. If anyone can help and describe to me (in child like, basic terminology) how I wire up a transistor to a PIR and then a 4-12v 3.5watt pump that would be just super. Or at-least put me out of my misery and tell me it's not doable. Thanks.

Question by Daveuppercut 


Strengthen plaster of paris with Christmas tinsel?

Through the Answers section here, I learned of mixing borax, rebake into powder, and then mix alum to create a high polishable cast...and also read discussion of the use of horse hair or fiberglass fibers from insulation for reinforcing the plaster. Unfortunately, I haven't ever found enough details to test either of these methods. The other day at the store, my wife asked if tinsel would work. It never occurred to me, but it sounds like it would make sense. Have you ever tried to pull a strand of that stuff a part? Also, I'm sure right after Christmas, it would be dirt cheap and in vast supply. I have been using the plaster of paris for making mold for some Sugru/Oogoo projects. Anyone ever try this or have any suggestions? Or if anyone knowledge about the fiberglass thing that I can use as basis, that would be cool too. Also, I know there are better materials than plaster of paris, that are stronger and all, but I am trying to at least use what I have on hand first, and I know other people would find it useful too.

Question by vphreeze   |  last reply


Calling all blind makers!

Hi everyone,Instructables readers may already know about the community of blind woodworkers from pages like ww4b.org. The university I am affiliated with (OCADU), and my research group are interested in bringing the expertise of all blind woodworkers into more and more classrooms. This includes post secondary institutions (colleges, universities), makerspaces, and anywhere else it might be useful. We currently have an open dialogue with some professional blind woodworkers, and have enrolled in woodworking classes at non-profit facilities for the visually impaired. But we are looking to learn from anyone else who has first hand knowledge of teaching woodworking (or other kinds of making) to visually impaired students.If this sounds like you or you are interested, please see the details at this instructables link: https://www.instructables.com/id/Blind-Woodworkin...If you have more questions, feel free to pm me.The instructable provides an option to do the survey via phone, but if you want to jump right into the anonymous online survey, here is a link.https://docs.google.com/forms/d/e/1FAIpQLSdoRLx0lC...BestEric

Topic by 3164382 


Does a 2-stroke Honda CB 100 NE engine need a battery to run? Answered

I have a Honda 2-stroke CB100NE (1018034) engine which I am trying to get working. This is the first time Ive worked with an engine so my knowledge is quite fragmented. So far the engine will turn over using the kickstart but I've been unable to get a spark. Documentation for this specific engine seems to be quite limited but I found a service manual claiming that the generator goes into the battery which then drives the spark plug via the coil, points etc. However, a friend told me that the spark plug can be run directly off the generator/magneto, and since the engine isn't in a motorbike which would require lights and a horn the battery isn't necessary. I'm also not sure how the rectifier plays into this if I'm not having a battery - is the rectifier only there to facilitate charging of the battery? So my question is, does my engine need a battery to power the spark plugs and if so, do I need to use the rectifier? Any help would be greatly appreciated. 

Question by Ikkalebob   |  last reply


transformer help needed

Hi guys, i'm a newbie on here so i would like to take this opportunity to say hello :) i have a salvaged transformer that i'm working on at the mo. It is the primary that is blown, but the secondary is fine. I am in the uk, so it is designed to run on 240. Because i am looking to produce high amps, one solution would be to use the secondary as a primary, otherwise i am looking at doing a full rewind. i'm kinda new to transformers, but have enough knowledge for the job in hand. my question is how many turns does the primary need to have? i know that you cant give me an exact figure without the dimensions of the transformer in question (700w microwave transformer if that helps) but i seem to remember from school physics that there is an equation to work out the number of turns a primary must have at a given voltage, i have googled for days to no avail, i'm guessing it is out there somewhere, but i cant find it :( and the last question is that if the transformer was to have too few turns on the primary, what would happen when it was plugged in? my guess would be that it would short out the mains and the coil would rupture, possibly tripping the circuit breaker? many thanks to anyone who replies :) and merry xmas to all :) 

Topic by jbaz73   |  last reply


How does someone with very little mechanic experience learn to fix a classic car?

My husband and I are both in our twenties, and neither of us have much mechanic experience or knowledge. You could say I have essentially none. But this is something I have always wanted to learn! My dad just passed away and I now have his 1967 SS Chevelle. Unfortunately, it hasn't had an engine in it for several years since he blew it up when I was a little girl, and it has been sitting ever since. I know we have a 396 block for it and many of the parts...although I can't exactly say what. I am pretty resourceful and a quick learner. Eager to put this car back together in memory of my Dad, and excited to learn, but don't have any idea where to start. We have family friends who are mechanics but I hate to ask them for too much help. I'm always of the attitude that I can "figure it out" but given the fact that I know so little about mechanic work, I don't know if that attitude applies here. Any advice/thoughts/resources on how and where to learn how to do this?

Question by slr1967   |  last reply


How can i convert the side windows in my truck shell to be side doors? More in details...?

I have an Innovation truck shell, it is a discontinued brand (came with my truck when i bought it) so no truck shell people want to work on it (a lot of them seem to have the policy that they won't work on shells they didn't install. My original plan was to find and have installed windoors, then have aluminum water jet cut to either cover or replace the glass if i couldn't just get them premade as metal or fiberglass doors. There was a video from germany that had the installation of what i was looking for, but nothing local, and i couldn't find them to buy doors. i am concerned if i can't find them and go to my secondary plan, to piano hinge and attempt to gas shock my waterjetted pieces and fabricate doors to fit in the frames, will leak and not work well, the frames aren't made for that kind of movement and may fail. i know i will probably have to cut my shell if there aren't indoors that fit my window holes. not sure where to start or go with this, any advice or strategy by  a knowledgeable person appreciated, Thanks!- Subconscionaut

Question by Subconscionaut   |  last reply


The ultimate challenge?

There are always good contests available for those keen on competing, but what about a real challenge that might run for many months? I am talking about rediscovering ancient technologies and ways of creating things. We have a lot of evidence that is in massive contrast to what archeologists want to make us believe. Be it the way the pyramids were build or just in what timeframe, the use of technologies thought to be impossible at that time or just the knowledge of things like star constellations that are not not visisble to the naked eye. In a lot of areas it seems not only archeologists but also some "secret powers" try to put a hold on discovering what was really possible thausands or maybe even millions of years ago. Things like the knowledge of distand star systems that are invisible to the naked eye might never find a suitable explanation. But what about tools and technologies used to create stonework that is hard if not impossible to create with our modern tools and technologies? I dare everyone to participate in the impossible! We know thausands of years ago milling, drilling, machining and lathe work was done but we have no real clue how it was done. At times when the rest of human kind was happy using stone tools and otherwise just hunt and gather for food some areas saw an explosion in technology. Within less than a few hundert years some builders in Egypt went from simple and explainable works to stuff impossible to do in today times. Same for India, the UK and the american continent. No hardend steel tools were ever found, no machines, no evidence on the how to, just the perfect work. Here is the challenge I propose: Come up with: 1. A way to cut or drill granite and harder rocks without modern tools or tech and still do it faster and more accurate. 2. A way to match hard rocks to each other with a precision down to less than a mm - as shown in many ancient buildings preferably on a big scale. 3. A way to create delicate carvings in hard rocks, things like hollow heads less than 5cm in size or cravings with spaces of less than 3mm wide and several cm deep - as shown in many India sculptures. 4. A way to build a lathe capable or turning several tons of steel with an accuracy better than half a mm and without electrical or combustion engines. 5. A feasable way to transport and accurately position several tons of stone - again without electricity or combustion engines. 6. A way to create sculptures with an accuracy shown by the ancient Egyptian ones, meaning perfection... 7. .... I could go on but I guess you get the picture ;) The solutions could be as simple as using sound and vibration or as complicated as finding a way to create tools hard and durable enough to proove the archeologists are right after all. And before you cry out that it is impossible: Consider the evidence! We know it was done but we don't know how, so let's show the world how we at Instructables solve the problems noone can explain ;) I can't offer any real contest, prices or such but maybe someone is reading this and willing to provide the base and soem prices?

Topic by Downunder35m 


Making a large electric motor from scratch

I searched the archived threads and found quite a bit alreadydiscussed here about making very simple and small electric motors fromscratch. What I want to do is to make a fairly large and powerful one(say, somewhere around the size of a coffee can). This is for asculpture project, and the motor will be driving a kinetic mechanism.I'm pretty handy, have a extensive range of tools and am comfortableworking with high voltage. What I am not, however, is knowledgeableabout designing or making electric motors; hence my questions.I understand that I'll need to wind armatures and so forth, but Idon't know what the advantages/disadvantages would be of making a DCversus an AC motor (either power could be supplied), nor do I reallyunderstand the differences between the various types of those two. Themotor needs to be able to start by itself under load (as opposed tosome homemade electric motors that seem to need a nudge to get going).Simplicity, low maintenance and ease of construction would be a plus.I had thought of making a homopolar motor such as they have at theExploratorium (http://www.exploratorium.edu/cmp/exnet/exhibits/group5/daisy/index.html) but it seems that homopolar motors like this cause considerable wearto the part that acts as a brush, which will work against my goal oflow maintenance. Unless...perhaps I could use a rolling conductor (like a precision bearing) as a brush? Does that make any sense?Thanks for any advice!

Topic by Bricology   |  last reply


How do I thin out 2-part epoxy?

I'm wanting to make some micarta-like material, using two-part epoxy and paper. I've done a test run, and the material was rigid after it had cured for a few days, but didn't cut like I hoped it would, because the epoxy didn't penetrate the paper. Part of the issue was that the paper was coated, but I'd also like to thin out the epoxy some so that it will soak into the paper better. I'm inspired in this endeavor by these two instructables: https://www.instructables.com/id/How-to-make-homemade-micarta/ https://www.instructables.com/id/Mokume-Kireji-DIY-Woodgrain-Composites/ The epoxy I'm using is 3M Scotch-Weld DP-190. The label says it contains epoxy resin, polymeric diamine, kaolin, and carbon black. The complete MSDS is here. This is what I'm using, because it's what I have. Got a case of these two-tube dispensers cheap at a yard sale. :-) So, what can I use to make this more liquid? Right now the consistency is a little bit thicker than honey. It doesn't spread out when applied to paper, and doesn't soak in at all. My limited knowledge suggests that toluene, listed on the MSDS, might work, but I'm hoping for something a bit less volatile. I'm aware that whatever I do is likely to extend the curing time, but that's not necessarily a bad thing.

Question by yoyology   |  last reply


Wireless Power Transmission

Nikola Tesla's grandest vision was the transmission of large amounts of power without wires. His work in this area was abandoned by his contemporaries, and there is still much debate over if it could or could not work. I would like to hear your opinions on this. Do you think it is possible? Would it require only one transmitter, or several, spread across the globe? Would it be safe? Would it be worthwhile? Could Tesla's original spark gap circuit been sufficient to drive it? Or would it be better to use vacuum tubes or solid state setups? Would the operating frequency be very high or very low? Pictured below is how I think Tesla may have done it, based on the information I've seen. It's a bit over-simplified, but to the best of my knowledge, it covers most of what is needed. Please note that, although the transmitter terminals would be at a much higher elevation than pictured, the receiving terminals could stay at a relatively low elevation. This link is to a YouTube video of someone using a small Solid-State Tesla Coil for wireless power transmission: www.youtube.com/watch Edit: I had orriginally imagined that the system would work by capacitive coupling between the Ionosphere and the coils. Afterwards I realized that electrostatic capacitive coupling will decouple after seperation between two plates is greater than 1/2 the wavelength (or, at least in theory), so I personally abandoned the idea. The only problem is that I can't imagine how power would be sent to airplanes. Also, this is a very good read on the subject, from a very interesting site: www.teslaradio.com/pages/wireless_102.htm

Topic by ElectricUmbrella   |  last reply