electricity

Can anyone please tell me what type of alternator from a vehicle I need to make a wind generator, and what voltage it might kick out, and if I had it going into an iverter what could I power please.

Posted by Reever Jenkins 6 years ago


HDI move an object with electricity 1/4 to 1/2 inch

If I need to move a small object with electricity how would I do this and what would I need? Thanks in advance.

Posted by BubbaJoeBob 3 years ago


Watermelons and electricity

AHA Gotcha

Posted by Punkguyta 11 years ago


where does electricity go?

I got a question. If we ground everything to the Earth for shorts and things like that, Where does that electricity go to? Does it just disappear deep down inside the earth? Does GE have an electrical well and is sucking all this electricity that people pour onto the ground? Please dont use big words like anode and cathode and coulombs (simple is better) :)

Posted by thematthatter 10 years ago


How to Save Electricity

Saving Electricity: How to Save Electricity Welcome!I've always hated "How-To" guides which don't explain why a certain tip works, or how well it works. Sometimes a topic is just as mysterious after you read the guide.My guide is different.In all honesty, this guide is a bit simplistic, but it does have a nice description of why there's no point to worrying about surges when electronic devices are powered up.

Posted by ewilhelm 10 years ago


how to make electricity from temperture difference

Hi, One day I saw on Discovery a guy using a local stream to make electricity. really cool, he attached a light bulb to it and put that into layers of stone. by doing so, the stone heated and so he was able to cook on it. Basically what I am asking is, how can you make electricity from the local stream by means of temperature difference with the air temperature. TXS!!!

Posted by DELETED_amulder1 6 years ago


Electricity generated from speed breakers

Hey >  Well is dere any1 who can help me out ???  I need some suggestions on how to build a prototype of a speed breaker that can be used to generate electricity >>>>>  I just want to show how the concept works like >>>>  the few links below shows the concept :  http://www.youtube.com/watch?v=6tIMhWpLDfw http://www.youtube.com/watch?v=ClRTuDNJ5a4 it would be of gr8 help >>> if ny1 cld help me out in this matter >>>> 

Posted by ajitram 7 years ago


Wiring Xbox 360 Fans, Basic Electrical Help, please.

Ok, So I ripped the cooling fans out of a dead xbox, and I'd like to use them for maybe an airbrush spray booth (depending on how much they suck) and I have some total newbie electrical questions. There are two fans rated at 12 vdc @ 0.4 amps each. I have a ac adapter with the same ratings. If I want these to run at maximum on one adapter, what rating do I need? I'm thinking 12vdc @ 0.8 amps, but I have a very limited understanding of electricity, so I'm most likely wrong. Instruct me, Instructables! Thanks very much!

Posted by hadokn 7 years ago


Reclaiming Wasted heat to make electricity

I work in an aluminum casting facility and we're looking for ways to save energy etc... one thing that we've got no shortage of is heat (during the summer the temp near the ceiling above the furnaces is over 230F) i've looked into stuff like they do in steel mills in Germany where they run pipes through the furnace linings and then use the heat from the furnace to make steam and run steam generators. but i was thinking of something else today. would you be able to just mount a bunch (or one huge) peltier exchanger (or whatever they're called) on the ceiling above the furnaces and use that to make electricity? i'm aware that they create electricity because of temperature differences (and not specifically from being hot or cold in general) so would we have to cool one side of the unit for maximum efficiency? are there any other ways that anyone knows of to turn waste heat directly or indirectly into electricity?

Posted by crapflinger 8 years ago


Question regarding speed electricity

Hi people! I have another thing which i do not totally understand, so as usual i have asked in one of my favourite sites! :) I always had a doubt on how "fast" is electricity. In our real world, i can observe that it is pretty fast. If i turned on a switch connected to a light bulb, i can see it turned on pretty much "instantaneously". So a question came to mind, how fast it really is? Is it near to the speed of light? So, i did some googling. According to what i have found and understood so far, it is the electric field that carries information and not the electrons themselves. And electric field travels near to the speed of light( of course, depending on the medium).  If that is the case, then from the "textbook" definition of electricity, it is the movement of electrons right? But according to what i have understood so far, electrons move pretty slowly. In DC a few millimeters per hour or so(not having the exact figure in mind, pardon me) and the average displacement in AC is zero. Then how exactly is electricity so fast? I would appreciate it if someone explains it in a simple way, both on speed and what exactly is movement of electrons. :) Update: Okay, so far my questions are answered, and it seems to take off in different directions(like science always does :D). So to stay true to the question posted here, i would like to say my doubts cleared! Many thanks to people who have answered my question, Specially Dr.Kelsey and Josehf , for the information provided! I will post other doubts in new topics.

Posted by charmquark 5 years ago


Tell me more about nuclear power as source of electricity.

Hi !Fishes can't see the water they are in ! That's why I need your personal and external opinions and view.The first source of electricity in my country (France) is nuclear.In a previous forum, I've noticed that a lot of Citizen of USA consider Nuclear energy is too much polluting and too much expensive (democrats candidates for US election reject the idea of more nuclear plants), and that it's not seen as a serious solution to reduce pollution and CO2 emission, etc ... In few words : you seems to dislike it. So, I would like to know why exactly, and that you tell me more about what you think about it.Here it's quite different. Nuclear energy is seen as a mean to be energetically independent. It's a mean to pollute less. And it's almost a local speciality, like are crepes, baguettes and croissants.The main producer is EDF (which stands for Electricite De France (electricity of France)). Until 1999, EDF had the monopoly (and that was better and safer IMHO). Since then, because of EU regulation, we've been forced to open the market ...Here are some data :EDF is one of the world's largest producers of electricity. In 2003, it produced 22% of the European Union's electricity, primarily from nuclear power:nuclear: 74.5%hydro-electric: 16.2%thermal: 9.2%wind power and other renewable sources: 0.1%Its 58 active nuclear reactors (in 2004) are spread out over 20 sites (nuclear power plants). They comprise 34 reactors of 900MW, 20 reactors of 1300 MW, and 4 reactors of 1450MW, all PWRs.---In 2006 :- nuclear : 85.7%- hydro-electric : 5.0%- thermal : 8.1% ( coal : 3.3%, gas : 3.2%, petrol : 1.6% )- others renewable : 0.9% (wind, sun and co)- others : 0.3%---

Posted by chooseausername 10 years ago


how do you make a water wheel?

 Hi I'm soon to move into a property with a rather nice stream running through it. At times it can be quite fast flowing. I thought it would be grat to make an electricity generating water wheel, but don't know where to start. It's not very deep but i can modify it. Any ideas?

Posted by simony 8 years ago


Why does electricity cause sparks?

Hi everyone! Why does electricity cause sparks? I have two scenarios in my mind, and i hope someone can provide me good answers. 1) I have seen on a lot of occasions, for instance the main transformers near my home, the wires sometimes keep sparking near the area where the wires are joined to it. Why does it spark? What is actually happening? And i do know that it might be caused by an overload or a short-circuit or stuff, i am not talking about what caused the sparking, but what is happening when one occurs. Why not just burst into flames, or heat red hot like a metal filament or something? 2) I have also observed sparks when, lets say i suddenly pull out the plug from the socket with the switch still ON, or sometimes even when i turn ON/OFF a switch driving a load. Why does this occur? 

Posted by charmquark 5 years ago


Tesla Costume

Hello, so this year for halloween I am hoping to go as our hero Nikola Tesla. the costume will be fairly easy I'm just planning on wearing an old suit etc. but what i really want to do is incorporate some type of electrical effect into the costume. I know a bit about electronics and can solder and figure things out when needed, all i really need is an idea of some type of electrical thing that wouldn't kill me and i can power via batteries.  in a perfect world I would like to create some type of spark gap generator between my hands but this might be too lofty an aspiration.  Anyway if anyone has any ideas specifically ones that wont kill me and aren't too hard to accomplish i would be very grateful. 

Posted by jumbohiggins 8 years ago


capacitors

I recently took apart an old stereo reciever that didnt work anymore. As always, I salvaged as much stuff as I could, and came across 2 huge capacitors. They are each about the size of a C- batery,and are rated at 50v, 6800 uF. I, of course, saved them, but now I cant think of anything to do with them!if anyone has any ideas, please let me know stat.

Posted by tigerdog330 10 years ago


Redirecting power to evade a power trip.

Summer days can be a bit too much in Southern California and my family uses a lot of electricity to keep the house cool. The problem is that one side of the breaker for the house is too heavy to handle all the appliances and electronics; because of it, the power trips a lot since people in my house apparently don't understand the whole "turn something off before you turn something on" concept. I considered running extension cords throughout the house but not only is it not practical but it can be a bit dangerous with the build up of friction from the ohms and what have you. I've been trying to think of ways to solve this issue and I was thinking maybe I could install a sensor switch or something of the sort that would not allow the use of certain appliances while others were on or maybe something that would turn something else off automatically in order for something else to be used. My biggest problem is I'm no graduate or electrician. I know a thing or two about the sort and am very capable of learning, I just need someone to point me in the right direction. I may not even be thinking in the right area which is why I'm posting. Any information would be greatly appreciated.

Posted by BnKSeth 6 years ago


Aren't children strange?

Today is Children in Need day in the UK. Non-uniform day at school (I went dressed as Indiana Jones), and fun activities in the afternoon.I got my Van der Graff generator out for a play, and found kids queuing up so that they could pay to be hit with thousands of volts. They knew it hurt, but they still queued. Some came back for more.Kids, eh?(Oh, and I let off a Party Popper behind the Head of Year 8 whilst he was trying to do a cool and suave impression of James Bond. That was funny!)

Posted by Kiteman 10 years ago


Need Help Making Circuit

I am working on a small weekend project that involves taking the power from the location on the PCB in a keyboard where the LEDs were and making it act as a switch to a small remote control outlet (Something Like This: http://ecx.images-amazon.com/images/I/410y7UnyvdL.jpg )I have tried using an LED glued to a photocell, though I am thinking it is somehow acting as a resistor and limiting the power that can go through. I have some transistors, What kind of a circuit can I rig up with them to make this work?

Posted by DELETED_benjgvps 9 years ago


ZIT!! ZIT!! OUCH!

I was just electrocuted! I Just got out of the shower, i of course dried my hands, mostly because i can't open a stuborn doorknob without doing it, and i saw one of those spinning party lights (you know the ones with the lights that shine therough the colored circles?) and i was unplugging it in my chase of spare parts, and i did it, i was pulling the plug out of the power strip and my finger went under the plug while it was still in and BAm it took a second to realize it and i'm ok i guess nothing burning or smelling bad, and i think it tried giving my carple tunnel, because now my wriste hurts horribly(i really am fine though) I'm having a hard time typing because my fingers are getting over it so my head wont pay attention anyway let me knwo about your recent or weird electrocutions, and no i didn't crap myself

Posted by cd41 9 years ago


Building a convection model for plate tectonics and ocean currents

I'm building a model to show our museum visitors how convection works related to plate tectonics.  (It can also be used for ocean currents.)  I'm stuck on the heating source, though, because we cannot have open flames. The model is a cell of water, about 0.5" wide X 10" long X up to 8" high (depending on water depth). I would to implement some type of circuit with a resistor that produces heat at the bottom, and inside the cell, and battery powered.  At the top at either end would be ice cubes, to cool the water so it falls back down and recirculates.  To see the currents, the ice cubes have blue food coloring, and I use a long pipette to inject coloring at the bottom near our current heat source, and mug of hot water. I'm having trouble finding information on: - what type of resistor (how many ohms?, anything specialized for being submerged?) - how large a battery/ies for a 4-hour day on the floor (rechargeable, of course) - other steps to prevent corrosion It will need an on/off switch and a battery connector, too, of course... I'm sure I may be missing some other important things to consider, too. Any feedback would be great. Thanks~ -Adam-

Posted by adam.blankenbicker 3 years ago


Passive RF battery?

Hey i was just wondering what are typical conversion rates for signal to electricity in passive RFID tags? Information on the subject is usually not geared towards the electrical charge being generated.

Posted by Qcks 4 years ago



Any bright ideas about an alternative source of electricity?

Fossil fuels are depleting, thermal power plants barely provide sufficient electricity. A new era has come, an era of science and technology. As we advance our knowledge, we need to fuel our needs. Think about a world without electricity, how will it be? So, why don't we put together our grey matters, and think about an ultimate solution?

Posted by S0uraV_DAS 4 years ago


No More Electricity!

This is more of a discussion then a question. Lately I have been wondering about the small amount of space that we have on Earth. In those thoughts, I began pondering about Thermodynamics (particularly, of course, the first law). Since energy can't be created nor destroyed - it only changes form - that most certainly means there is a limited amount. There's a capacity. Much like a battery, it can only hold so much energy. The Earth is essentially, then, one huge battery holding millions upon billions upon trillions upon trillions of energy units (it cannot be specified to electricity since it can change form). If that is correct, then my theory makes sense. If there is only so much energy, and electricity is energy, then one day we will reach that capacity, right? Let's create a hypothetical situation - we massively overbuild the world with the biggest skyscrapers that, with the newest technology, go thousands of feet in the air. Standard homes no longer exist, and the smallest of homes are at least four stories. These conditions cover every corner of the world. Power-plants are at a massive draw. Now everybody knows that you can't really "use" electricity for good, for it always returns to another form of energy - it can't be destroyed. So what if, with this extremely advanced society, electricity was used quicker then it was replaced? And this massive usage was continued until all of the energy that is "stored" in planet Earth is being used at one time. That brings me to the real question of debate - doesn't that therefore mean that all power-plants will one day, when this "Complete use of energy" comes, will no longer generate electricity? Is it impossible to believe that they will have no energy left to "grab" (electrical power plants don't create electricity, just generate and convert it"? Now, I may be entirely wrong. This theory could be 153(nice even number) percent wrong, but it's what I brainstormed. Any feedback or debate is appreciated ;)

Posted by freethetech 7 years ago


pumping water without electricity?

So I want to build an aquaponics system, because they're awesome, but I need a way to move water about 6' verticaly. I dont have elctricity where I want to put it, and there's not going to be. The water needs to be moved from the bottom of the fish tank, to the top of a resivoir tank. I want to buy the least amount of stuff possible for thisproject, so I could use some help:D

Posted by jakem456 8 years ago


question regarding a western electric telegraph sounder

Hey all, I hope this is the right place, Ive been lurking instructables for years, but haven't posted in the forums before.  I am working on a project that involves an old western electric telegraph sounder...  I am having some issues and am trying to troubleshoot--when I put a meter on the two leads on each of the two coils, I get no continuity beep from my meter, and its reads 130 on screen...  What does this mean, aside from the obvious 130ohms of resistance?  I apologize as I know this is probably a no-brainer for a lot of you, I'm just bumbling through this stuff, figuring it out as I go. Thanks Michael

Posted by justanassembler 5 years ago


DIY Home Improvement Books Recalled. Faulty wiring instructions.

From the Consumer Product Safety Comission: Name of Product: Home Improvement Books Units: About 951,000 Publisher: Oxmoor House, Inc., of Birmingham, Ala. Hazard: The books contain errors in the technical diagrams and wiring instructions that could lead consumers to incorrectly install or repair electrical wiring, posing an electrical shock or fire hazard to consumers. Includes some Sunset titles, as well as Lowes and AmeriSpec. Sold from 1975-December 2009.

Posted by axlotleft 8 years ago


Electrically Conductive Plastic: a general discussion.

I find i have an odd set of interests. Specially with regards to this forum.  I'm interested in electrically conducting plastics. I've been hitting the Wikipedia pretty hard looking for information on the topic.  I've found a couple of interesting articles:  http://en.wikipedia.org/wiki/Polythiophene http://en.wikipedia.org/wiki/Polyaniline My main reason for pursuing this as of late is because I think electrically conductive plastics offer a way to create high efficiency photovoltaic cells on the cheap (least relative to growing pure Silicon crystal without oxygen contamination).  Azodyes, which are popular doping agents for current thin film photovoltaic cells  can be linked directly to the organic back bones of the polymers, and i think this will make the conversion of photons into electrons more efficient. There's other organic compounds (specifically i'm thinking of metallocenes which can be used to generate positive valences, also known as "holes" within the molecular structure of the plastics) which can be used to dope an organic solar cell, but azodyes are the most obvious. Anyway... gonna hit up google. if any y'all have ideas post em up.

Posted by Qcks 7 years ago


Changing the Natural Laws for Science Fiction

Ok, so there's a new show in the U.S. called Revolution. I haven't watched it, but it seems the premise is a world where all electronics suddenly stopped working. No iPhones, no lights, no vibrobots. nothing. My question is, what possible explanation could they have for this? A world where electrons won't flow doesn't make sense to me. They still have lightning. They still have fire. Their brains work. Does anybody know if there is any science behind this? What could stop electricity from working in all technology and still allow the natural functioning of electrical processes in nature? I refuse to watch the show because I'm pretty sure they will never answer this question, or worse, they will blame it on aliens.

Posted by justbennett 6 years ago


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?

Posted by Lftndbt 9 years ago


sustained mild shsock device for artshow

Hey guys I'm hoping to fins some help. I'm doing an art installation piece that is hands on. for one of the pieces i would like it when it is held to create a tingling sensation similar to that of holding a 9v battery to your tongue only in the hand of the participant. i don't want it to be painful, just tingly. i was planning on painting the object with conductive paint into halves so when it is held it would complete the circuit. i would like it to be sustained until they put the piece back down. is something like this possible and if so any suggestions would be greatly appreciated. thank you again for any help

Posted by hushukyo 5 years ago


Bio-mechanical electricity - 13W per knee.

A stroll around the park may soon be enough to charge the raft of batteries needed in today's power-hungry gadgets.US and Canadian scientists have built a novel device that effortlessly harvests energy from human movements.The adapted knee brace, outlined in the journal Science, can generate enough energy to power a mobile phone for 30 minutes from one minute of walking.A slow walk can generate an average of 5W of electricity, but they have models that will produce 13W - enough power for a one-minute stroll to provide half an hour of talk-time.The prototype makes you sound like an extra in Terminator, but the inventors are predicting saleable products within 18 months, probably powering (in the first instance) modern prosthetic limbs.Soldiers may also benefit from wearing the knee brace to power the multitude of devices they now carry ,such as night vision goggles and GPS."They treat batteries like they treat food and water - they are so essential to what they do," he said.Link to BBC articleLink to BBC VideoLink to Science Magazine articleThis whole idea seems like a "Good Thing" to me - even without the computer-control, I don't see why a pedestrian or jogger couldn't wear a pair of generators similar to those in wind-up torches, charging phone and PDA as you stroll around doing the shopping or jogging across the park. Get them with a Nike or Motorola logo, and we'd see hundreds of people wearing batman-style utility belts, stacked with all the gadgets the modern human "needs". It could really help wearable computing take off as well.

Posted by Kiteman 10 years ago


solar outlet

Would anyone know how to create a solar outlet? I have seen many projects that use small solar panels and car chargers or USB ports, but some electronics that might need charging or power  dont have car chargers or USBs. Is it possible to make a portable solar outlet?

Posted by lethereberock009 8 years ago


Circuit Diagram for LED bulb running on 120V AC

I have been watching a lot of YouTube videos of building your own LED bulb using a scrap CFL bulb. Since I have watched a lot of those videos, I want to build one. However, almost all of those videos are about making one that runs on 240V AC, and where I live I use 120V AC. Take this video for an example: I also noticed that in that circuit diagram, there is a 5th diode that is unnecessary. So I want to build an LED bulb similar to that one in the video above. But I am not so good with electricity, so I am not so sure how I can modify the circuit so that it will run with 120V AC instead of 240V. Can someone help me with this?

Posted by ADRIANT28 1 year ago


Large NC (Normally Closed) Switch

I am currently working on a project which requires a larger NC switch. The concept is that when someone sits on the switch, the current will be blocked and not flow. When the person stands up, the current will flow through the circuit. This specific switch has to be flat enough for someone to sit on. Does anybody have any ideas on how to build one?

Posted by SamuelD79 1 year ago


Beginner Electronics Information?

I'm interested in taking on a few of the projects in the electronics category, particularly the high voltage compilation. Obviously though, this is some pretty dangerous and complicated stuff (maybe just to me), so anyway, I was wondering if there were any books,  web pages or guides with basic starting out info that might help me understand what those guides are talking about? You probably should assume I know nothing about electronics, because its more or less true.

Posted by Snowball tlwcb 8 years ago


Relationship between volts and amps

I'm working on a project found in this thread https://www.instructables.com/community/Solar-powered-cell-phone-charger-case-hack/ I think I'm almost ready to buy parts and start building but I have a small issue with getting the exact voltage and amperage output I need. I've been researching for hours and I can't find a simple answer to this problem. As I understand it, as voltage decreases, amperage increases to compensate and maintain wattage. Working on this basic understanding I've come up with this model. If I have a solar array consisting of 6 PV cells (1.5V 50mA ea) wired together I get 9V and 300mA. This is too much voltage and is on the low end of amps I want. If my math (and understanding of the subject) is correct, then if I use a 5V voltage regulator I will have a final max output of 5V and 433.3 mA which is right about perfect. Am I doing this right or is there more to it, like how I'm wiring the cells together? Am I correct in the idea that using a voltage regulator will increase my amp output? I'm not schooled in electricity in any way so I would appreciate any help I can get on this in as simple of a form as possible. Everything here I've put together from several hours of studying sites on solar DYI and electricity. Thanks. For reference, these are the solar cells I was referring to: http://cgi.ebay.com/High-Efficiency-Solar-Cell-32-22mm-1-5V-50mA-0-075W-/320541888508?cmd=ViewItem&pt;=LH_DefaultDomain_0&hash;=item4aa1c90ffc#ht_2428wt_1148 *EDIT* Below is a diagram of what I suspect may give me a 5V/490mAh output which would be absolutely perfect. I need to know if I can wire two different sizes of solar cells together in this manner and how it will effect the output.

Posted by HittingSmoke 8 years ago


5V Nextel Phone Charger OK to use?

I have a phone charger for my Nextel phone. On one end is a wallwart for a standard US outlet. The other end is the proprietary Nextel connector. The phone connector end was unfortunately broken, but fortunately I have a spare :) I believe the rest of the rig works fine, and rather than throwing it out, I took a look and it was rated 5V @ 800mA DC. AFAIK, 5V is what most USB devices work off of. Would it be suitable if I snipped the end off and rewired other connectors on to this and used it as a charger for other devices? Thanks in advance!

Posted by mikesty 10 years ago


Grounding a magnetic levitation circuit

I need help understanding the circuit attached, from what i understand is that i can power it from a 12V mains adapter. The one i have is 1 amp which i think is enough. But more importantly for the grounds, that i should connect them all up to the ground coming from the 6 pin on the left opamp. As though this ground would act as a central one, with all the other ones connected to it. Is this correct or not, if not then please explain to me how i should ground this circuit. I claim no rights to the content in the link and am using it for my own recreational purposes. http://uzzors2k.4hv.org/projectfiles/magneticlevitator/Magnetic%20Levitator%20circuit.GIF

Posted by o0SLOVAKIA0o 4 years ago


Condom Electricity Maker

Can anyone say if, or how this works?

Posted by trevman 10 years ago


Insulating tape, better than electrical tape

I'm looking for an electrical insulating tape that I can put over some exposed wire that will affix and stay put on plywood. Right now I'm using electrical tape, but the adhesion to the plywood surface isn't working that well. Anyone out there have ideas or suggestions?

Posted by phidgetsinc 4 years ago


Make electricity from trash!

Hey, guys! recently I've published my FIRST instructable! It's a project to make electricity from biogas produced from organic materials. Check the link below to have more information: https://www.instructables.com/id/Cash-from-Trash-Make-your-very-own-electricity/ Note: this instructable is in the "green living and technology challenge" so if you like it vote for me!

Posted by baker amin 7 years ago


wattage

I was out buying the parts for the free electricity from telephone port in wall, but the resistors have no wattage posted. The man at the electronics store said he needs the wattage for the correct resistors.

Posted by 3l3ctr1cman 10 years ago


A fountain that does NOT run on electricity

I know it is possible to build a fountain that runs on gravity and water pressure, but I'm not sure how to go about making one. I understand that you can't get something from nothing, and I'm not looking for a fountain that would run endlessly. If someone could show me the basics of how such a font might work, I would greatly appreciate it. 

Posted by Trigonography 7 years ago


39% and climbing - renewable resources in Portugal.

In the UK, less than 5% of our electricity comes from "green", renewable resources.In Portugal, they generate 39% of their power with renewables, and that is set to climb.These red "snakes" - the Pelamis wave-power system - are built in the UK (but guess which government hasn't invested in them?), and Portugal is also investing heavily in wind, solar and hydro-electricity.Link to photo storyIf one of the poorest countries in Europe can manage this, why can't the rest of us?

Posted by Kiteman 10 years ago


candle's black smoke deposit seems not to be electrically conductive

(This is the first topic of the "failed experiments" group.)I was wondering if the black smoke of the candles could be electrically conductive (carbon) when deposited as a layer over a piece of glass.After a quick and basic experimentation, it seems it is not.Here is how I proceeded :- I've put a piece of glass over the flame of a candle so a black smoke deposit appear on its surface.- I did so that it becomes opaque (if you want to try, be careful that the piece of glass may break because of the heat)- then, I used two crocodile clamps to make the contact (I've put a certain depth of aluminum foil between the claws of the clamp and the piece of glass)- then, I tried to measure the resistance with a multimeter, but the multimeter displayed no value at all.

Posted by chooseausername 10 years ago


Constant arc with a taser...need help!!

Can anyone give me some help on how to make a constant arching spark across 2 electrodes like a commercial taser?

Posted by PyroMonger 10 years ago


Small power source

I was planning to make LED jewelery, but would need a very small power source. In the best case it could be powered by the body's movement. Is there anything small enough to bit on a wrist, yet can power about 10 LEDs?

Posted by DemonDomen 8 years ago


Safety, Electricity and Death

I came across this AC safety info and found it useful enough to share. Link: www.cdc.gov/niosh/docs/98-131/overview.html FTA: 1 mA Barely perceptible 16 mA Max current an average person can grasp and let go 20 mA Paralysis of respitory muscles 100 mA Ventricular fibrillation threshold 2 Amps Cardiac standstill and internal organ damage 15/20 Common fuse or breaker opens circuit I later found this DC info... Link: www.allaboutcircuits.com/vol_1/chpt_3/4.html FTA: "AC ... is 3 to 5 more dangerous than DC of the same voltage and amperage." Slight sensation felt at hands DC Men: 1.0mA, Women: 0.6mA 60 Hz AC Men: 0.4mA, Women: 0.3mA  ... Painful, but voluntary muscle control maintained DC Men: 62mA, Women: 41mA 60 Hz AC Men: 9mA, Women: 6mA ... "In industry, 30 volts is generally considered to be a conservative threshold value for dangerous voltage. The cautious person should regard any voltage above 30 as theratening, not relying on normal body resistance for protection against shock."

Posted by milsorgen 8 years ago


Mini Tesla Coil

I would like to know how this http://4hv.org/e107_plugins/forum/forum_viewtopic.php?36853.post can be made? I tried to make it using the pdf that was attached but i failed. I have included pics of my failure http://4hv.org/e107_plugins/forum/forum_viewtopic.php?99090 Can somebody please help me?

Posted by deathnoteviewer 7 years ago