Squids in danger

Squids and other cephalopods have been found with high levels of "chemical contaminants" in their bodies. Since many ocean dwellers eat squid and octopi, scientists are worried that the entire food web is being comtaninated.Full story at Cnn.com

Topic by Lithium Rain   |  last reply


Dangerously Fun

Just found an interesting website I thought I'd share:http://dangerouslyfun.com/They've got a fairly small set of projects but they look pretty well done. From the About page:"DangerouslyFun.com provides instructions for creating various physical devices, many of which are dangerous. This information is provided in recognition that dangerous things are sometimes really fun."Amen brother!

Topic by rachel   |  last reply


The Dangers of Disney

I was trying to find out who was currently leading the US presidential polls, when I got distracted by an item on Freedom of Information. That led me to this article. Isn't the internet wonderful?Inhaling helium to produce an amusing squeaky voice (a favourite game for children in the United States and Europe) may not be the innocuous party trick it seems, according to emergency medicine physicians at the Wesley Center for Hyperbaric Medicine in Brisbane, Australia (Annals of Emergency Medicine 2000;35:300-3).Simon Mitchell and colleagues report the case of a previously healthy 27 year old man who inhaled helium and subsequently developed a stroke with transient blindness and radio-graphic evidence of cortical infarction. However, the man had inhaled the gas direct from a pressurised canister, whereas most children who perform the trick - to imitate the voice of Mickey Mouse - inhale the gas from helium filled balloons.The patient developed rigidity and lost consciousness within moments of inhaling the helium. On arrival at the emergency room 15 minutes later, he regained consciousness but was found to have complete visual loss and evidence of cortical infarction.PubMed ArticleI still haven't found out who's leading, though...

Topic by Kiteman   |  last reply


Dangerous or Incorrect instructables

"Flag As" only supports Wrong Category, Inappropriate, Incompleted, and Spam. How does one report something as "Dangerously Wrong"?   Such as this one that was actually part of the "Featured" email that goes out from instructables: https://www.instructables.com/id/Power-Bank-1/

Topic by krsmes   |  last reply


Caution ,danger message

A cordial greeting to the whole community; I would like to ask if there is a standard formula to alert the who is reading to pay attention to the dangers of electric current while you perform a job and at the same time to arise from any liability from damage caused by an incorrect or incomplete understanding of instructions step by step. thank  for help  

Topic by torx   |  last reply


A dangerous path to walk.....

A man and a mythJudge for yourself. It is your health, indeed your life that may be at risk if you take the advice of a "salesman" over a health official.

Topic by Goodhart   |  last reply


A dangerous acid is in schools

I would like to start a poll here.Dihydrogen Monoxide is a dangerous acid that can kill in a multitude of simple ways. It is all over schools and I would like to know:Do you think it should be banned?pleases leave your comment in the appropriate area below, and at the end of the week, I'll tell you what it is. (and if you do know what it is, please don't spoil it) I would like to see your respinse before you research.======ANSWER======Ready?..................IT'S WATER!Dihydrogen mononoxide - H2O , water.Some students at ATM University sent around a research study and a poll and around 80% of the student population voted to ban it. This is an interesting effect of how ingnorance can have a significant affect on life. Moral: DO THE RESEARCH!

Topic by gimmelotsarobots   |  last reply


Laser Cartridge dangers?

I'm thinking about messing around with a laser printer cartridge (They're cool, look at them- they're just asking to be made into a laser gun!) Is there any safety concerns I should worry about? (Most likely an HP cartridge, I haven't acquired it yet, I just saw it.) Looks similar to picture.

Question by Doomwaffle   |  last reply


Am I in danger? Answered

I am building a new tazer design, based off of my diy taser circuit, powered by a 9 volt. I shocked myself in the right temple ( don't ask ) and I am wondering if it could harm me. How much voltage an I getting? Btw ever since I shocked myself my right eyelid "flutters" rappidly every now and then, a few times a day.

Question by XOIIO   |  last reply


Heat absorbing glass question Answered

I'm taking apart a Kodak 4200 projector. The lamp assembly includes a piece of "heat absorbing glass".  The manual says not to touch it unless wearing gloves, to keep it covered when out of the projector, and that it may shatter.  Being clueless, this sounds spooky.   Is it dangerous, or will I just wreck it for projection if I get fingerprints on it?  Most glass shatters, but is this going to spontaneously burst into shards?  It's not going back into the projector.   Is it useful for anything, or should I wrap it in foil and toss it in the garbage?

Question by mole1   |  last reply


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. 

Topic by jumbohiggins 


What to do about asbestos ceiling tiles in an old house?

My daughter just bought an old house that has asbestos ceiling tiles.  What's the best route? Cover them with a sealant, add a new dropped ceiling or W H A T?   Help

Question by mimiodella   |  last reply


Are there any dangers in handling transformers? Answered

 I recently got a hold of a old arcade cabinet and I plan on gutting it. In the process I discovered that there was a big transformer present in the machine. Are there any dangers in removing the device? And if so how do i prevent myself from any harms?

Question by hacker3455   |  last reply


How much electricity is dangerous?

I found plans to make a device to give yourself a static charge using a negative ion generator. It outputs 7.5 kV and 10 mA. I've seen it in use and I know it's not dangerous. I wanted to build two of them together making it output 15 kV. Unfortunately that would also make it 20 mA. I'm not sure what the resistance of the human body is so I guess my question is will 15 kV and 20 mA flowing through a person be dangerous? Thank you for the replies and I'm sorry if this is a stupid question. I'm pretty new to my electronic hobbies.

Question by bruechel87   |  last reply


Can I work on a TV without discharging the CRT?

I have a TV that is in a place where the remote will not work (Dont ask its complicated lol) and I want to rewire the ON/OFF switch on it so that it will be like a foot or two away from the tv. Do I have to discharge the CRT on it before I work on the ON/OFF switch which is only attached by wires to the CRT and flyback transformer circuit. Could I just wear some thick rubber gloves to work on this because Ive never discharged a CRT before and have no interest in doing so.

Topic by jackillac92   |  last reply


Linseed oil health dangers? Answered

 I frequently get linseed oil on my hands when I finish my woodworking, is it a health hazard? I sure like the smell! Correct me if I'm wrong, but I'm told that linseed oil is edible until boiled. After it's boiled, it becomes hazardous if eaten (that's why you don't cook with flax oil, heat alters it). Is it a danger to the skin? Thank you!! `Neph P.S. I'm using genuine, pure boiled linseed oil. It's not synthetic. I added a totally random picture, for your enjoyment. :D

Question by nepheron   |  last reply


Instructable censored for being dangerous

I would just like to comment about the fact that my Instructable on how to light yourself on fire (or how not to light yourself on fire) was censored. I understand that it is something that is very stupid and dangerous, but there are many things on Inructables that are dangerous and stupid (blowing fire, home made tasers, etc.) A lot of these things are also illegal. I just wanted to know exactly why mine was the one that pushed everyone over the edge, especially since it's so obviously a stupid thing to do. When I did it I was on fire for maybe 10 seconds, and the only reason I burnt some of my hair was because I was even more stupid and put the alcohol the whole way up my arm. What I really wanted was some comments on how maybe doing something like this could be made more safe, because there really isn't anything on the internet showing you how to light a part of yourself on fire. If you are into low budget film making it might be something people look into (I did) and if you can't find something you might do something even as stupid as I did. Anyways just wanted to defend myself a little bit. Alex

Topic by alexsk8ca   |  last reply


Dangerous Local Pest, What to do ? Answered

Well the local wild coyote is boldly walking up and down our Reno street at 2pm in the afternoon, sniffing at the neighborhood house dogs leg-lift corners and bushes.  As a life rule, I figure "live and let live"... The bears and wild animals are moving into town because food is scarce in the mountains this year and our leaders admonish us for leaving garbage readily available and encouraging predation.    BUT this afternoon there was some confrontation at the fenced pen our dog uses for his duty and our dog was afraid to go out and chose to leave a large pile in our computer closet which I boldly managed to step into with both feet when starting the computer after supper.  Yes, I was prepping to do our monthly ledger but first I managed to drag brown foot prints over rugs through our bedroom to our bathroom.  After a couple hours of cleaning the most foul smelling dog poop, the monthly bills and Febreze treatment of the wall to wall rugs, we had to use a leash and collar to get our naughty pet to step out to the high fenced dog pen and let him discover it was safe ! ....  We watch preschool grand children and fear the situation.  What to do ?? ... I could rig an IR light beam trip wire to cause a servo to rattle some cans to discourage coyote walkabout in my yard but hope someone has a better suggestion ?

Question by iceng   |  last reply


6 Farad Coilgun

I recently came across 4 1.5Farad capacitors and made them into a capacitor bank, but I just want to get a general idea what would happen if I made a 6 farad coilgun...would it go through walls or anything?

Topic by adrewmc   |  last reply


Is soldering a health risk?

I was just wondering how (aside from being clumsy and burning yourself) soldering can be a health risk. I would suppose the fumes would be bad for you, and is there anything else? And is it safe to solder in an average room in a house, or should I do it outside for better ventilation? 

Question by diggingeagle   |  last reply


Tritium encased in plastic: a few questions

My main question is, the Key fob being sold at  Deal Extreme, is it safe?   I seem to remember from one article that stated it is fairly safe as long as it remains exterior to the body (in other words, do grind it up and breath / snort it, and don't swallow it). Is that a fair (generally) statement? I am started to question some of the things I find and read at wiki-im-pedia     

Topic by Goodhart   |  last reply


are high power ir leds dangerous? Answered

Im experimenting with ir motion sensors and im think i have a working model, but then i realized i would have a ir led on at almost 150 ma and i didn't know if that was safe, so i managed to reduce it to 10 ma and still work, but then i realized that if i didn't know how dangerous ir leds are, then any level could be unsafe for all i know (i came to that realization after i changed the circuit because im smart like that) i couldn't find any safety info on ir leds, just ir lasers, is there a certain power to distance ratio or anything i should know? aside from not shining it directly into my eyes (im not that far-gone)

Question by the judge   |  last reply


Redneck Rollercoaster

This is called the Redneck Rollercoaster, but that's not quite the truth. This is an insane car mod that looks fun as hell and has the danger factor to bump it up to make it extra stupid. So who doesn't love some stupidly dangerous fun? Weirdos. Who loves it? Canadians.FYI, the guy on the left on the sofa is the driver. And how it works...

Topic by fungus amungus   |  last reply


Can someone help me with this circuit? Answered

I'm working on a fireworks ignitor based off of Bill Gurstelle's design in his book Absinthe and Flamethrowers, and I'm having some trouble. Instead of two switches, mine has three switches.  Like Bill's design, it runs off of eight AA batteries. One end of the battery pack goes to a toggle switch and a keylock switch, and the other goes to a pushbutton. They both end at a bolt. I have two long wires with alligator clips on both ends. Each clip clips to the bolt, then to a piece of nichrome wire which is wrapped around a fuse. In theory, when all of the switches are flipped, the nichrome wire lights the fuse. But this isn't happening. I've tested all of the switches, and they all work. The bolts and the nuts holding them in place both conduct electricity, but no power is arriving at the bolts. All of the components were purchased from Electronic Goldmine, except for the battery pack, which I bought at Radioshack. The ignitor is housed in a wooden (and therefore nonconductive) box. What's wrong?  (Attached is an awful drawing/collage I did of the circuit. If you need a picture of the machine itself, I can take a picture.) Thanks, Noahh

Question by noahh   |  last reply


Slightly dangerous machines of marginal practicality.

Looking for thoughts, questions, criticisms, and followers for this project: http://pariahcycle.blogspot.com/

Topic by pariahcycle 


Is galvanized steel dangerous to be making rings with?

I am making chainmail in my room and my dad thinks we'll get zinc dust in our carpet and possibly get sick from me bending the wire.

Question by pindalanderz   |  last reply


Any danger in Parallel battery circuit?

Hi, I have a voice recorder that runs on a 1.5 V AAA battery. I keep running through too many of them. I have more  AA batteries and I was able to figure out a  setup to run it off non-AAA sources. I was thinking of connecting 2 AA in parallel. Is there any danger my recorder if I do that? Any power spikes  or other things that can destroy my recorder?

Question by phillyj   |  last reply


Is drinking water with dry ice in it dangerous? Answered

In Science class we had some dry ice, and a friend put some in the bottom of a class of water, then drank the bubbling water. He said it was safe, and others did it with no apparent ill effects. I tried a little taste of the water and it tasted like mineral water. Is this safe?

Question by ilpug   |  last reply


Carbon Monoixide Danger, Camping Heater?

Hello, I have recently bought a camping heater however i'm now unsure if i can use it. i bought it for my garden shed, i work in there building and fixing things. it gets cold in there some nights and i just use the heater for 30 mins or so. I installed a carbon monoxide alarm thought it was safe but im not so sure now.

Question by Daniel Deacon   |  last reply


Is Olive Wood Dangerous for Woodworking? TOXIC?

I've been wanting to make a small mallet out of a tree branch, And I recently spotted a small olive tree branch that fell. Since I'm pretty new to woodworking, I thought I'd google the wood to find out it's properties, This is the confusing thing that I found: Here, It says that Olive Wood is commonly used for "kitchen utensils, carved wooden bowls, cutting boards, fine furniture, and decorative items", Which means that it should barely be something allergenic, Aka safe to use, Since it's used with food. But here, It says that Olive Wood is "Olive trees are extremely allergenic, with an OPALS allergy scale rating of 10 out of 10" aka "9-10 Extremely high potential to cause allergies, should be replaced with less allergenic species". Now I'm confused... Does anyone know what really is true?

Topic by Yonatan24   |  last reply


What should I do if I broke a CFL.? Answered

 Besides clean up the glass. I understand that there is mercury in them. Is there a an amount in one bulb that could cause a health hazard?

Question by aaronscottaugustinhotmail.com   |  last reply


Paintballing

I found this at http://forum.specialopspaintball.com/index.php?showtopic=58518 . I brought this to the Instructables community because some people don't seem to realize what paintball really is. Post you tips and questions and I will either add them to an Istructables or try to answer your questions. But if you click the link and read, you will probably won't have any questions.

Topic by ry25920   |  last reply


Are you to blame?

OK, I know it's a deliberately attention-grabbing topic name. Sorry about that.There was a post on the Bamboo bike frame, essentially saying "a disclaimer that this could be dangerous isn't enough; people aren't qualified to judge the strength of their homebuilt bike frames so might still get hurt even if they are careful", which attracted a lot of ire, but also a response from whiteoakart reframing the question, thus:As a maker and writer of an Instructable, what is your responsibility to keep your readers safe? How far does your culpability extend?This is obviously a knotty issue, and one that seems to have a range of attitudes across the board- some people say "pointy things are pointy, hot things are burny, don't hurt yourself" and leave it at that, some people list all the grievous injuries possible from their Instructable.In my opinion, there are two major things to consider:Is a person likely to do themselves harm even taking reasonable precautions?An Instructable on how to weld, with clear advice on breathing protection, eye protection and not electrocuting yourself should be "safe"An Instructable on free rock climbing, even with all the advice in the world about how to climb well, could easily get someone killed because free climbing is inherently dangerousIs the intended audience capable of accurately assessing the risks? The risks of a table saw are obvious- put your hands in the wrong bit and it will cut them off- but the risks of high-voltage electrics are harder to judge with simple "common sense" because a seemingly minor fault could be lethal.Both of these have an element of "reasonable" to them- if you make your instructions foolproof nature will give you a bigger fool, but there is a point at which it is reasonable to assume that a sensible person following your instructions with care and attention will not injure themselves.More thoughts?

Topic by PKM   |  last reply


Does anyone have any ideas on building a DIY flying machine?

When I say 'flying machine', I mean I want to be able to relatively safely take off from the floor, fly, and land the thing, preferably sans death. I think my best bet would be something simple, not easily achieved, I'm aware, but still, any ideas guys?

Question by paradoxdetected   |  last reply


Ignition Coil

Yes, I just posted something on a flyback. I was interested in that, until I saw this. It got me interested in ignition coils, so I got one new from the autoparts store for $20 (USD). I looked on the site, for the schematic, and realized that I didn't know what the rectangle was. Is it a resistor? I'm new to electronics, what size resistor do I need (if it even is a resistor)?What about the capacitor? I have a 100uf 200v electrolytic one, will that work?Also, part of the core is not in the coil, it's square shaped, could I rig it to work like this flyback circuit?Or this one? (simple driver circuit)?Sorry about the never ending beginner electronics questions, I just really don't have anyone else to ask.

Topic by John Smith   |  last reply



Is it dangerous to take apart a honeywell space heater?

I have a broken honeywell space heater. Everything works exept it dosent heat up. Is there a way to fix it and is it dangerous?

Question by michoi   |  last reply


Are my flyback projects dangerous? (x-ray) Answered

Hello, I was wondering if any dangerous x-rays or other caustic things like ozone are created when I'm testing my flyback transformers. How much ozone and how much x-rays is dangerous to humans? could long-term use of flybacks create radiation poisoning? I'm actually a little worried :/

Question by DELETED_Electorials   |  last reply


Is showing the user SQL error messages dangerous? Answered

If during error conditions your website shows a page full of SQL messages, does this put you at greater risk of an injection attack?

Question by NobodyInParticular   |  last reply


Are electric vehicles deadly dangerous to build and repair? Answered

A local high school tech class is converting a pick-up truck to electric and I got the idea that I could convert our Explorer, (the engine is shot) but an auto mechanic I met told me he can't get insurance to work on an EV due to the danger of the high voltage- this is disappointing to me because I could really get a lot of use from re-purposing this truck to a green(er) vehicle. Help me be more green!

Question by paganwonder   |  last reply


Is it dangerous to heat up a crafting pipe cleaner? Answered

I am wondering whether its safe to melt, not burn, pipe cleaners to see what happens. I am wondering whether it's made with something extremely toxic or carcinogenic such as PVC in which the fumes would be harmful.

Question by dont_unplug_me   |  last reply


Danger in separating compressor head from tank?

Wasn't sure where else to put this, I'm trying to turn an old ambulance into a shop truck and I'd like to use the stock giant O2 tanks on the side as the reservoir for pneumatic tools. How dangerous would it be to rig the compressor head somewhere else in the truck and pipe the air to the tanks? I'd of course include a pressure release valve and some sort of cup to catch moisture since these tanks wouldn't have a bottom valve (though I doubt a full on air dryer would be practical). I was hoping to use flexible tubing to run the air but I doubt that would be safe at tank pressure. Would black iron and pipe tape be enough? Am I setting myself up for a world of hurt? These tanks would be powering pneumatic tools and possibly a media blaster, thanks for any advice, Mac

Topic by Macinations   |  last reply


Computer recycling: Dangers for even the well intentioned

Are we really making it impossible to live in this ever increasingly "darned if you do, darned if you don't" society? Disposal of computer repercussions" Picture a stack of used PCs packed with corporate data sitting unattended on a shipping company loading dock. Imagine what happens to your company's stock price when the Environmental Protection Agency tracks the serial numbers of lead-filled monitors from an illegal landfill back to you. Think about a villager in a third-world nation burning circuit boards in an open-air shop to recover a few cents' worth of precious metals. Now, what's going to be generated by that 3-year-old PC your administrator just pulled from an employee's desk? Data theft? Lawsuit? Poison? Finally, consider research firm IDC's estimate that 269 million PCs were sold worldwide last year, along with 8 million servers. The bulk of them likely were replacements for systems moved into recycling or reuse. You start to get a sense of the dangers associated with disposing of outdated computer equipment.Concerns about computer disposal fall into three main categories: Eradicating data, finding a market for outdated but usable equipment and recycling or disposing of materials in an environmentally safe manner...."Anyone have any suggestions for are "fearless leaders" ? Image is of SKILLS from the PA recycling center and can be read about at this link for SKILLS

Topic by Goodhart 


Cyclists....

Just for fun this time!We all love bycicles.Enjoy nature, loose some kilos or just having some fun with the kids.I even like to ride if I find the time and the right weather.But what about those courier riders in the city?Those fitness fanatics riding in a pack of 30 and surprising you on a winding mountain road by fully blocking it...The guy hitting you from behind on the traffic lights because he was only looking on his phone...Or maybe this drunk guy in the middle of the night not even realising that he uses the entire road...What is your worst nighmare experience with someone using just legs to get two wheels moving?And: What is your worst nightmare experience as a cyclist yourself?The guy cutting you off while turning and running over your bike?Someone "accidentally" opening their door when you ride past their car?Or maybe these parks constantly blocking the bike lanes and forcing you to go into the traffic?

Topic by Downunder35m   |  last reply


Help!! It's 3am and I have a bubbling and squeaking battery!

Please help! I procured an electric wheelchair today (worn and torn, but in good shape.  It had 2 12v batteries, little smaller than an auto batt.  Didn't write down the amperage tho...The batteries were visually inspected for bowed or expanded sides, cracks, oxidation.  Everything appeared in order.  They have likely been sitting for some time.  Stupidly, I did not check electrolyte levels.  Oops.  Could easily be low.  I plugged the charger into the mainboard for 30 minutes, watching closely.  No issues, no overheating.  I left it for another 2 hours.  Again, no noticeable issues.  I tested the drive motors by controlling it around my driveway briefly. Power was very low.  It worked, but clearly lacked juice. I plugged the batts in for another 4 or 5 hours.  But after that time, I noticed a crackling/squealing (faint) sound.  As if pressure was escaping.  Bad news.  I had the chair chassis (and batts) in my workshop, and now I was afraid it may blow, contaminating everything.  The batteries feel warm. One more than the other. Beginning to panic, I threw on my goretex, respirator, goggles and gloves and carefully detached the battery cable from the main board.   I've never had one of this size blow, and have no idea what it could do.  very hesitantly, I rolled it into my garage, and closed the door.  Now I'm afraid to sleep, because I'm concerned about it. Is this Normal old battery behavior?  Could this be due to low electrolytes?  A small crack in the case?  Is there anything I can do besides wait?  I'm not real anxious to go too close for too long.  Is there anything I can do that would not increase hazard?  I'm about to throw a tarp over it, but is there a high flammability risk if a high amperage 12v were to blow? Guidance highly appreciated.  Thank you.

Topic by huck alexander   |  last reply



Sawing MotherBoard PCB's- Inhaling Dangerous Dust Particles? Answered

I have recently salvage a couple MotherBoard PCB's, And I was wondering if I cut them (saw them with a hacksaw) Will they give off a lot of dangerous dust? I've heard people talk about the fact that it's dangerous, So I was wondering it it really is. If it is, I thing I'll score the PCB's with a utility knife, Or just throw them away

Question by Yonatan24   |  last reply


Would it be dangerous to submerge a plasma ball in mineral oil?

I'm thinking about creating an art project, but would need to submerge the glass part of a plasma ball in mineral oil (which I've heard is not conductive). Would this be dangerous?

Question by rockyreasoner   |  last reply


Danger is my middle name leaving her mark

Celeste, aka Danger is my middle name, has been an intern here at Instructables for the summer.  Today is her last day and she is making sure to leave her mark behind with these great paper stars! Thanks for being so awesome!

Topic by Penolopy Bulnick   |  last reply


student arrested for camera tazer... are dangerous instructables acceptable?

Well, a 14 year old boy in Connecticuit was arrest for modifing a disposable camera into a tazer, making it into a weapon. Well you may have noticed that instuctables shows multiply how to's on this very weapon. My question is, should dangerous and illegal instructables be tollerated on this site? I think anything that dangerous, or illegal should be taken off the site even though they are just for "informational purposes". I'm not saying that it is instructables or any authors of those instructions fault, but i think that there have to be more guild lines for what is acceptable.link to article: http://ca.news.yahoo.com/s/capress/080403/technology/technology_shocking_camera

Topic by hedgiehog   |  last reply