hacking ftp servers

Does any one know how to hack into the ftp server of a web site so you can download files and stuff?

Topic by knex-4-life   |  last reply


Polyvinyl Chloride

What is your little brother (or sister) have in his/her mouth right now ? What makes your car smell nice ? What plastic is my ipod made of ? WHAT GAVE ME CANCER ?.... READ THIS

Topic by littlechef37   |  last reply


Car Phone

No, not a phone in a car--a phone that is a car, or at least looks like one. This car is a converted VW Beetle that is being used to promote a phone company. I think this may be even more exciting to see on the road than the sheepdog from the movie Dumb and Dumber.Link via TechEBlog

Topic by joshf 


DIY Hatchback Subaru Legacy

Check out this DIY Hatchback I caught a few pictures of coming off the Bay Bridge in Oakland, CA. I think the guy driving was a woodworker, and needed a couple extra cubic feet to fit things like dressers and wardrobes.

Topic by ewilhelm   |  last reply


Non-stop Train Prototype

A train that doesn't ever stop or slow down? Sounds ridiculous (ly efficient). This design is a pretty interesting take on the concept, though liability issues and real-world feasibility will probably keep this from ever making it past the drawing board.Link

Topic by joshf   |  last reply


Deleting Registry

How do you delete things in your computer's registry so you can redownload trials?

Topic by MisterHankie   |  last reply


High-Tech Surfboard Made from Cardboard

Instead of the traditional methods, this surfboard is based on a core that's made up of nearly 400 pieces of cut cardboard that intersects and is then coated with fiberglass and resin. So far it's only a one-off, but more will surely be made.When it came time to replace his old surfboard, Mike Sheldrake decided to build his own. But the former Web programmer didn't have the sculpting skills to carve one out of foam the way professional builders do. So he used 3-D modeling software to design a snap-together deck that's as sturdy as a conventional model and performs just as well, made from the cheapest material he could find: cardboard. link

Topic by fungus amungus   |  last reply


good way to bunny-hop???

I need to know how to bunny hop. private message me with links

Topic by Evil Bike   |  last reply


how would it be if we could make a skimmer?

Wouldn't it b very cool if we could make a skimmer? and ohh i found the website www.stormhawks.com try to check it out .my username is "scorpius acel" there join my squadron.

Topic by sem_on123   |  last reply


Million Dollar Bicycle

For a million dollars you can get a bike with the lowest air resistance in the world and hopefully get a better shot at the Olympics. That's what bike manufacturer Koga is claiming for this custom ride designed for Dutch rider Theo Bos. Oddly enough, they make the claim that since it has only one speed and no brakes it is one of the most difficult bikes to ride. Whatever. That style of bike is called a track bike and if you're in a city you've likely seen people riding them around. It's not that tough. Link

Topic by fungus amungus 


Spain Turning Into Desert as Water Wars Begin

Parts of Spain are feeling the pinch of too many people going after too little water. Some of the land is drying out after water-thirsty resorts and corn farms in the arid land guzzle it all up and leave nothing behind. About the only thriving part is the black market which is charging ever higher prices.Where I live in Oakland we're getting phone calls from the water utility to cut back on water use and are facing higher prices ourselves. People could even face penalties for excessive watering of gardens. Makes me feel OK for letting most of our plants shrivel up and die after all. Water Shortage in Spain

Topic by fungus amungus   |  last reply


Space Shuttle Launch

As you may know, the Space Shuttle just launched from Kennedy Space Center, delivering the most sophisticated part of the international space station called the Kibo Lab...referred to as the Lexus of the ISS. I live in Florida, and managed to take a couple photos of it from outside my house. They're nothing special, but kind of cool.

Topic by Weissensteinburg   |  last reply


How do I wire an electronic flashgun?

I'd like to build an electronic flashgun, like those used in magic tricks. Basically you put flash cotton in the base of the barrel, then some flash paper on top of that, and when the glo plug ( cigarette lighter thing ) at the base heats up it lights the cotton which shoots the now lit paper from the barrel causing a flame thrower type effect. So I'm after some advice and instructions from anyone out there who knows more about DIY electrical wiring and whatnot than I do ( which is basically everyone ) so that I don't hurt myself from lack of know how XD In return I'll make an Instructable of my efforts so other people can make their own

Topic by grantdevine   |  last reply


First Solar Powered Speedboat

Via The UberReview"It is not too often that we associate solar-powered with anything fast and or furious, but perhaps it is time that we start. The Czeers MK1 is a 10-meter vessel covered in photovoltaic cells that is capable of hitting speeds of up to 30 knots (55.5 km/ph to you non-nautical folks out there). While there are certainly faster boats on the water, those tend to use obscene amounts of fuel. The solar-powered Czeers MK1 is naturally going to be a lot quieter than its gas guzzling cousins, which would make it great for sneaking up over fish (though there is limited space to put them if you catch them. I would like to see a similar model with little bit more space for passengers, even if it did mean sacrificing some speed. Speedboats are so limited in what they are able to do, but if this had a little extra space, it could do so much more."

Topic by laminterious 


Nova's Elegant Universe

Nova's Elegant Universe is a very well made scientific documentary about string theory. If any of you have been interested in The Fabric of the Cosmos by Brian Greene but don't have a chance to sit down and read something. This is for you.String theory is trying to unify our understanding of everything through one equation, if you think that is interesting then: Click here to watch the entire series // More Brian Green at TED here \\

Topic by lamedust   |  last reply


"Ride" by Michael Cooper - My Favorite Thing From the Maker Faire

This was, by far, my favorite thing at the 2008 Maker Faire. From Make's Description:Ride is a custom single rider helicopter with eight engines conceived & created by sculptor, Michael Cooper. It looks like more like a time machine invented by Dr. Seuss for George Jetson than anything you've seen in the air (or on land) recently.Michael Cooper is a sculptor who combines wood, metal, kinetics and mechanics with a twisted imagination resulting in beautiful, unique works of art that roll, spin, hop, contort and make people laugh while simultaneously scratching their heads. After 34 years as an art instructor at Foothill and DeAnza Colleges, he has now "retired" to his studio in Sebastopol where he spends his days devoted to sculpting, inventing and pushing the boundaries of form and function with a heavy does of humor.I know the pictures don't do it justice, and it's really hard to see everything, but take a long look and answer this question before you continue: Do you think it does/could fly? (Scroll down below the line and look at the pictures.)... did you look at the pictures first?There are so many reasons why it can't fly that I won't bother to discuss them here. However, the truly fascinating thing I liked so much was standing around Ride and listening to the conversations, and particularly watching its creator stage-manage the discussion. Lots of people wanted to discuss why they thought it could or couldn't fly - remember that this was the Maker Faire, so lots people here were builders or tinkerers (or at least thought of themselves as such). There were half-hour long heated debates about the tiniest of minutiae -- fuel line diameters and spiral exhaust ports, for example.Periodically, someone would gain the courage to think about the system as a whole and would approach the creator to ask, "So it flies, right?" He'd answer truthfully enough by saying, "Well, it's not done yet," and then launch into a detail, like the difficulty in synchronizing 8 engines; this would get the whole group rolling again. Later Saturday evening, when most of the kids had gone home and everyone else was outside listening to a band, a group of particularly crotchety old tinkerer-types were showing off their smarts and trying to outwit each other. After one onlooker had finished with his unnecessarily loud pronouncement of "based on my extensive experience building 1/6th-scale steam locomotive engines, I absolutely sure it can fly," another of the group tentatively approached the creator, and asked the inevitable question.Michael Cooper took his cue, dodged, and redirected into a discussion of how the transmission linking the 8 engines to the propellor was open, and the first time he ran it, he was probably going to get covered in grease. I burst out laughing.After they were all rolling again on how many cubic feet of compressed air the vehicle should optimally carry for its four pneumatic lifter feet, I quietly asked Michael how many people "got it" and how many people asked if it could fly. He confided that I was very much in the minority. Further, he got a big kick out of removing his name tag, and listening in to the can-it-fly conversations, too.I really hope I get a change one day to work with Michael Cooper to design and build a gorgeous Ride-like vehicle for me, so I get the chance to answer the question, "So, does it really fly?"

Topic by ewilhelm   |  last reply


Human Electric Hybrid Vehicle

The HE Human Electric Hybrid Vehicle It looks like an interesting concept car. Although, it might be hard to find somebody who wants to pedal it. I really like the solar panels on top, and how on the downhill, it charges a capacitor for energy.This HE Human Electric Hybrid Vehicle concept uses the power of your muscles as well electricity stored in the batteries. It allows smooth and constant velocity both uphill (with the help of the electric motor), as well as downhill (when the wheel acts as a generator and charges the batteries). The vehicle can turn 360 degrees maintaining stability all the time. Additional power is acquired from photovoltaic placed on top of the vehicle as well as during de-acceleration from regenerative braking. Elderly and handicapped people that are unable to provide enough kinetic energy can also charge the batteries directly from the grid.

Topic by Brennn10   |  last reply


ATV Headlights acting up!

Hey everyone, I bought my 2001 warrior this summer (yes thats where 2001warrior came from) anyways it has been giving me some issues with the headlights. The headlights work great in lowbeam but when I put them in highbeam my left headlight goes out! does anyone have any suggestions to what I should do?

Topic by 2001warrior   |  last reply


The geek daily Scheduel. <--- i hope i spelt that right, otherwise i'de be a geek castaway.

What Geeks do every day.7:00 AM= Wake up and brush teeth, then polish braces. (LOL)8:00 AM= After hour long brace polishing we eat a healthy fiber filled breakfast.8:30 AM= Leave for school. We like to be early.12:00PM= Talk to friends about Conquer.3:00 PM= After school, run away from bullies, all the way home.3:45 PM= At home, play Conquer.3:46 PM= Live Conquer.4:00 PM= Start doing homework.7:00 PM= Finish homework and study8:00 PM= Eat dinner then sleep instantly. Repeat every day, any day.

Topic by kingghaffari   |  last reply


Protein Folding - The Game!

Human VS Computers - an algorithmic competitionScience and technology have been mimicking nature for as long as human beings have been tinkering. Computer scientists have developed neural networks and genetic programming techniques to try to approximate the computational methods of nature. But here's something new:http://fold.itFold it is a game that takes advantage of unique human perspectives in problem solving and also the innate competitive drive to solve the insanely difficult problem of protein folding."Since proteins are part of so many diseases, they can also be part of the cure. Over the summer, we will add new functionality to the game to allow users to design brand new proteins that could help prevent or treat important diseases."-I think this is interesting, have you guy's tried this. I can't wait to see how we (as humans) pan out.BG

Topic by lamedust   |  last reply


Proper way to "mount" a bearing?

I'm not really sure on the proper way to mount a bearing. I had a few ideas on how to do so, but I want to know what your methods are, or which of mine are the best. Images are attached. In most of these methods, there's a little collar on the bearing. I didn't discover till recently that most bearings don't have those.

Topic by cvxdes   |  last reply


motobike from old drill

Does anyone know how to motorize a bike, when the motor is from an old drill? I have been trying to do this for weeks, and I couldn't figure it out. This is what I have so far:I am trying to put the motor on the frame of the bike, and attach a sprocket to the end of it. The sprocket will be linked with the bike chain, coming from the rear wheel and leading to the petals (actually, the axle where the pedals used to connect). I will most certainly need a bike chain extension, so I would also like links to sites where I can get some.Also, I would like my bike to go fast AND have moderate torque, so I need a gearbox assembly.I know this is a lot of requests, so take your time. Thanks.

Topic by YummyPancakes   |  last reply


Too bad this ends so soon.

If I had another month, I was planning on making a nice instructable on how to make a good motorized bike, doing 150mpg, with 7 speeds, and a max speed of 80mph.. Although I don't think anybody will get up to that fast. You'll still be able to petal, and it's street legal (considered pedal assist) No welds required. The modification process can be dumbed down to a sheet of metal, hacksaw, and a drill. However, I'd recommend a sheer for cutting, but that's just me. The total cost of the project would be a bike, plus $200 in parts, plus $200 for the engine. Maybe I'll submit it to the green one instead, 150mpg is pretty good. That is if I get all the parts and have the time to put it together, plus do a write up.

Topic by cvxdes   |  last reply


In Boston?

Hey!If you're around on Friday Nights, come to MITERS!We have build parties every Friday from 7:30 on, at N52-115.We're a bunch of students with a penchant for inventionWho run this complete machine shop, EE lab, and creative haven, with lots of space for large projects.Everything goes, from motorcycles to electronic clothing, with a good helping of logic, lasers, microcontrollers and motors.Instructables itself came out of MITERS!Here's our instructables group.Here's our website.Here's our location.

Topic by stasterisk   |  last reply


water conductivity meter

Hi does any one know how to build a water conductivity meter which measures in Microsiemens. as an added bonus i would like it to be able to measure other features of water quality such as the Ph value

Topic by tawcnysc   |  last reply


help killer homework

Help you have 3 hours to find the life cycle of a hermit crab for me i need a diagram and if possible adaptation though im ok on it. help help help help help

Topic by DELETED_Gavabc123   |  last reply


The Memristor - they've found it!

This came out quite a few days ago, but I haven't seen it until today.HP's Henry Williams and his group have accidentally stumbled upon the fourth fundamental element in electronics - the memory resistor, or memristor. Basically, it's a resistor that changes its resistance with elapsed current flow, or total amount of charge that has passed through it, and retains its resistance even after current ceases to flow through it. From the article:"The classic analogy for a resistor is a pipe through which water (electricity) runs. The width of the pipe is analogous to the resistance of the flow of current—the narrower the pipe, the greater the resistance. Normal resistors have an unchanging pipe size. A memristor, on the other hand, changes with the amount of water that gets pushed through. If you push water through the pipe in one direction, the pipe gets larger (less resistive). If you push the water in the other direction, the pipe gets smaller (more resistive). And the memristor remembers. When the water flow is turned off, the pipe size does not change.Such a mechanism could technically be replicated using transistors and capacitors, but, Williams says, “it takes a lot of transistors and capacitors to do the job of a single memristor.”The memristor's memory has consequences: the reason computers have to be rebooted every time they are turned on is that their logic circuits are incapable of holding their bits after the power is shut off. But because a memristor can remember voltages, a memristor-driven computer would arguably never need a reboot. “You could leave all your Word files and spreadsheets open, turn off your computer, and go get a cup of coffee or go on vacation for two weeks,” says Williams. “When you come back, you turn on your computer and everything is instantly on the screen exactly the way you left it. "Apparently, evidence of memristors has been around for quite a while, but it was only until now, during the age of nano-technological exploration, that we finally have labeled the "strange voltages" we've found in experimental circuits as a result of memristor behavior. The discovery was made while doping Titanium dioxide with some dopant that the article fails to cover. Anyhow, the resistance of TiO2 changes with the amount of dopant covering it. Since the dopant does not adhere perfectly to the TiO2 substrate, the flow of charges (electrons) can move the dopant, and cause it to cover more or less of the substrate, thus changing its resistance. "Williams found an ideal memristor in titanium dioxide—the stuff of white paint and sunscreen. Like silicon, titanium dioxide (TiO2) is a semiconductor, and in its pure state it is highly resistive. However, it can be doped with other elements to make it very conductive. In TiO2, the dopants don't stay stationary in a high electric field; they tend to drift in the direction of the current. Such mobility is poison to a transistor, but it turns out that's exactly what makes a memristor work. Putting a bias voltage across a thin film of TiO2 semiconductor that has dopants only on one side causes them to move into the pure TiO2 on the other side and thus lowers the resistance. Running current in the other direction will then push the dopants back into place, increasing the TiO2's resistance.HP Labs is now working out how to manufacture memristors from TiO2 and other materials and figuring out the physics behind them. They also have a circuit group working out how to integrate memristors and silicon circuits on the same chip. The HP group has a hybrid silicon CMOS memristor chip “sitting on a chip tester in our lab right now,” says Williams."I think this is pretty awesome, considering the current breakthroughs in nanotechnology and downsizing of transistors, memristors would enable a whole new field to be born, and circuit theory may have to be re-designed.Like Leon Chua said, the man who first came up with the idea of a memristor, "now all the EE textbooks need to be changed."These next few years in the field of EE should be very interesting =)Image from Spectrum Online

Topic by T3h_Muffinator   |  last reply


Robot goes on an airplane!

Robot and I went flying the other day, so we took a picture together. Whenever I wear it out in public, I hope somebody will come up to me and say that they're a member, too. Hasn't happened yet. I look a tad bit tired(/retarded)...since i'd been flying all day. EDIT: Yeah, I look really retarded in that picture...but at least Robot looks groovy!

Topic by Weissensteinburg   |  last reply


Dolphin Gets Prosthetic Tail

This dolphin was just a couple months old when it got caught in a trap and turned its tail into a useless stump. After a year and a half of recovery and building, she now has a prosthetic tail and has been swimming about with it. Nice. Link

Topic by fungus amungus   |  last reply


!!! JOIN HOT NEW GROUP !!! (LocaMoto)

Join the hot new group "LocaMoto" HOT HOT HOT AWSOME NEW GROUP

Topic by rickick   |  last reply


A basic (very basic) description of a Brushless DC motor.

So... before I start... I am not a physicist, nor am I an electrical engineer. Hopefully someone within one of those (or both) professions will chime in and enrich this discussion. That said... I'm going to be using leyman's terms. This thread is specifically meant to explain how a brushless DC electric motor exerts a force, and how that force is used to generate work. To start off, I'd Like to explain the components which comprise a brushless DC motor: First... You have an axil. The axil's purpose is to spin. Next you have natural magnets, or solid state magnet; I use the terms somewhat incorrectly, since a natural magnet refers specifically to nickel or ferrous base magnets, but there exist a large variety of compounds and composites that exhibit the ability to produce magnetic fields. In practice you have many in a motor, but for our purposes... we can pretend we have one. The natural magnet's job is exert a magnetic field while attached to the axil. After that we have an electrical coil. Once again, in Brushless DC motors, we have many of these, but for our purposes we'll use 3. The electrical coil's job is to produce a magnetic field which can move in a circle. Finally we have the engine housing. The purpose of the engine housing is to hold everything together. Note: I'm intentionally leaving out the computer control mechanism. there are alot of great instructables on microcontrollers. Most Brushless DC motors requrie one to work since there is no mechanical timing device, as there is in a brushed engine. So... how does this fit together? In this setup the natural magnet produces a force when next to the electrical coil (This coil is also known as an electromagnet). This is because the charge of the coil is opposite to the charge of the natural magnet. Once the Natural magnet and the electromagnetic coil align with each other, the first coil shuts off and the second turns on. Once again the natural magnet is drawn towards the magnetic pole. This process repeats until the natural magnet has spun in a circle (note: usually you want it to continue to spin beyond a single revolution.) That's the basic (very basic) idea behind a Brushless DC Motor.

Topic by Qcks   |  last reply


underwater sparkler

Is this real?CLICK HEREfor some reason i cant add the video if anyone wants to try, calcium chloride is basically water hardener

Topic by budsiskos   |  last reply


Flugtag -- human powered flight?

Have you seen the videos for Flugtag? It looks like a great excuse to build something fun and jump in the water, and maybe fly a few feet too.Most of them look like this: And here's the US record holder, at a whopping 155 feet: I bet we could do better than that, especially with a drop. ;) Anyone have a proposal for Team Instructables? They hold these things around the world, so it's not just US. I bet we could pick up on style points as well.From the official page:The first Red Bull Flugtag took place in Vienna, Austria, in 1991. Since then, more than 35 Flugtags have been held around the world -- from Ireland to San Francisco -- attracting up to 300,000 spectators. The record for the farthest flight-to-date currently stands at 195 feet set in 2000 at Flugtag Austria. The U.S. record stands at 155 feet set in Nashville, TN in 2007.Teams are judged on three criteria: distance, creativity and showmanship. What constitutes a craft is purely up to the imagination of the participating teams. Past Red Bull Flugtag entries have included a pregnant cow, a diaper-delivering stork, a pimped-out Cadillac, a giant Oompa Loompa, and yes folks -- a lobster named Larry.

Topic by canida   |  last reply


Tank Implosion

Fun with air pressure and a vacuum.via Neatorama

Topic by fungus amungus   |  last reply


My Mousetrap Car

It's not perfect, it only goes 2-3 meters, and it's always failing in one way or another. Getting these things to work is harder than it looks.

Topic by Spl1nt3rC3ll   |  last reply


bicycle generator

Has anyone ever tried to build a generator that would fit inside the bottom bracket of a bicycle using the spindle thats attached to the cranks and pedals? seems it would work better than the ones that rub on the tires.

Topic by oldcrowrich   |  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


Elementeo Chemistry Card Game

14-year-old Anshul Samar has created his own science-based fantasy card combat game Elementeo. Check out the interview with him below.Elementeo is a strategic battle game where you use your elements across the battlefield in reducing opponent's electrons to zero. You do that by harnessing the strength and moving properties of the elements and compounds, and by using their reactionary powers. For example, Oxygen can rust any neighboring metal or Copper Conductor can shock any metals and send them back to the deck. via Wired's Geekdad

Topic by ewilhelm   |  last reply


Jeep Waterfall

If you haven't already seen the Jeep Waterfall, I advise that you check it out since it is exceedingly awesome. While you're at it, you may as well check out Autobiography of a Jeep. It's a classic.

Topic by randofo   |  last reply


Killerjackalope's social experiment results

Well I've been conducting a secret social experiment using shopping bags and the environmental topics everywhere as a media for this to happen. Basically my plan was to see if I could affect the decision of whether or not to take a bag when it's not completely necessary, to change the course of decision I used different phrases and tried to get a more accurate measure by choosing the same people that come in for milk or bread each day.The phrases are:'Would you like a bag?''Do you want a bag''Do you need a bag?''Wee bag there, mate?'Bag?'The results were really quite interesting, the one putting emphasis on need (very subtlety) reduced bag takings by over half in a day, whereas 'Wee bag there, mate?' produced a very high bag taking day because it detracts from the bags impact as an object. The other things I found was that it's actually possible to control some customers bag taking completely, there's a customer that comes in every day to get milk and I have managed to control his bag taking with about a 95% success rate, so shopkeepers unite and we can eradicate unnecessary bag taking, thereby reducing the majority of plastic bags that end up in the street and ocean, landfills are another story, thankfully my stores bags are fully biodegradable...What do you make of all this, and is it possibly a bit much power to give to a shop worker...On another note I have curtailed the efforts of one customer I know as the bag thief, he used to take five or six for various uses, through gentle shame jibing he's now down to one.

Topic by killerjackalope   |  last reply


Embarrassing Moments in Engineering

Mental Floss compiles four great examples of not-so-great engineering feats and one dramatic fix. The Tacoma Narrows Bridge makes an appearance, of course, as well as three other detailed examples to learn from. Mental Floss articlevia Neatorama

Topic by fungus amungus   |  last reply


Making a bug collectors helm.

Does anyone know of some instructions to make a leather type cap with magnification glass or strange levers protruding out of it? I'd like to make something "weird-scientist"-like for my entomologist friend, Thanks! edited to spell "bug guy" correctly

Topic by Oakherder   |  last reply


I dream of cheesy

I have just learned that people believe that eating cheese before bed will give you nightmares. I have also just learned that scientists have proven this not true. In fact, earing cheese before bed will improve your sleep and depending on the type of cheese that you have eaten, will depend on the types of dreams that you have. Now, I wonder how all that Cheez Whiz that Tetranitrate has been eating is affecting his sleep. You can't make this stuff up.

Topic by randofo   |  last reply


attaching grind plates on aggressive skates

I havent ridden my aggressive skates for a while so i cant remember which side to attach my grind plates, (for some reason i took them off when i stopped usin them.) can someone help.

Topic by XI3   |  last reply


Logo Carved onto human hair

Thought I'd share thisBoing Boing Gadgets' Joel Johnson was at McMaster University yesterday where he met a researcher who used a focus ion beam microscope to carve his school's logo on a human hairI find it amazing how well it came out. If we can do this now, just Imagine what well be able to do in the future! Advertisement spaces in hair?!!!

Topic by Keith-Kid   |  last reply


Rope Faling

What would happen if you put a rope around the world and tied one end to the front of a house and one to the back of the house the held on to it and cut it on the other side (not the on your holding on to)

Topic by Slayer7   |  last reply


Without Hot Air: Mackay's new Book on Global Warming

My friend told me about a new book by David Mackay. I've added screenshots of two of the really nice graphs he put together in his book. Says my friend:Forwarded Message:David Mackay, Cambridge U Physics Professor and a flat-out rockstar inthe field of statistical inference, has written a book on SustainableEnergy, which he is (as usual) giving away for free on his website. http://www.withouthotair.com/There's also a few slide decks for the overview: http://www.inference.phy.cam.ac.uk/mackay/and a blog: http://withouthotair.blogspot.com/I'm not much through it yet, but the gist seems to be putting realnumbers on the size of the energy problem, much as Saul Griffith hasbeen doing. It's written in his usual style, which is to say it readslike common sense you feel you should have known all along.

Topic by nagutron   |  last reply


Smaller taser setup

Is it possible for a novice tinkerer like me to use just the capacitor from a disposable camera to make a taser, wiring the battery in seperately instead of using all the plastic?

Topic by grantdevine   |  last reply


Explore the Human Body with an Online, 3-D Interactive Tool

Argosy's Visible Body is the most comprehensive human anatomy visualization tool available today.This entirely Web-delivered application offers an unparalleled understanding of human anatomy.The Visible Body includes 3D models of over 1,700 anatomical structures, including all major organsand systems of the human body.Link via Pop Sci

Topic by Tetranitrate   |  last reply


Battery Power in a Taser

Hey, I'm making a 'Glove' Taser using a disposable camera and I wanted to know a few things which most people who read this will laugh at. Firstly, I wanted to put a stronger battery into it and wanted to know what the best battery to use was, keeping in mind that I wanted it to be hidden so I can't use C or D batteries or anything like that. And secondly whether by soldering more wire strands to my contact points (the hurty bits) whether it would carry a greater charge? ie, if 5 strands of copper wire carries 'X' charge then maybe 15 strands would carry '3X' charge. Any help here would be a huge bonus and when I make my Instructable on my Glove Taser I'll give credit to anyone who tried to help me XD

Topic by grantdevine   |  last reply