Shorting Capacitors? Answered

Hi Guys, Recently I found a person selling a power supply for $3 and I thought why not to buy it and salvage the components. I was wondering will it be safe to short the huge capacitors in the power supply? Thanks :)

Asked by The Prickly Potato 3 years ago  |  last reply 3 years ago

Short Introduction:

Hello Friends, Let me introduce myself to this community, I am David Sheldrick, very new to this community, I want to be a member of this forum by participating in the discussion forum and also want to share my views and suggestion regarding different topics of this forum. I hope you all will support me throughout the discussion. Thanks and Regards, David Sheldrick

Posted by DavidSheldrick 5 years ago  |  last reply 5 years ago

Short Introduction:

Hello Community, I want to be a part of this community as I am new to this site. I am very happy to find this kind of discussion board. Thanks and Regards, Derren Brown

Posted by DELETED_DerrenBrown 5 years ago  |  last reply 5 years ago

Short absence

Hey guys, I'm leaving for France this monday and I'll be gone for about two weeks. So if I won't reply that's why =D I want to wish everyone a great holiday and I hope I'll talk to everyone once I've returned. -AUG-5OM3-

Posted by AUG-5OM3 6 years ago  |  last reply 6 years ago

help with shorting probem on my curcuit

This circuit does not work because of a problem with power shorting to ground at the motor. I think that is the only problem. The servo provides a 4.5v power source and the polarity can switch allowing the original 4.5v servo motor to run forward and reverse. I am making this to run a motor on 12v and the servo on 4.5v. R1 keeps the transistor saturated and the R2 is in there because I read it would help the transistor turn off completely. I made this circuit work (the right voltages went to the right places) in one direction but now it is more complex, I think I’m having a shorting problems. Can anyone help?

Posted by kendallickes 9 years ago  |  last reply 9 years ago

should I publish a steampunk short story I am working on?

I am working really hard on this so I have been wondering should I publish it?

Asked by nerd7473 6 years ago  |  last reply 6 years ago


I just can't seen to get a project started and completed in time anymore....and now I have missed another deadline...

Posted by Goodhart 10 years ago  |  last reply 10 years ago

Oh my, another apology needed: Randofo

Randy, I apologize for misspelling your moniker in my last forum. My typing has become very erratic lately, but that was no excuse for my not double checking it. (I corrected it, now).

Posted by Goodhart 9 years ago  |  last reply 9 years ago

Strange shortening of pages - I only get the bottom section.

If I try to go to either my Comments page or the Forums page via my shortcut links, I only get the bottom part of the page available (see screenshot, and note position of slider bar to the right.  The cropping of the Forums also happens when I use the standard (grey) tabbed link. To make this bug report, I had to go via the submit link on the front page. The Recent, Contests and Answers pages do not appear to be affected. FF4, XP. UPDATE: it was an idiot hacker* who thinks that vandalism is the best way to prove a point. * The tabloid-headline version of a hacker, not the proper version.

Posted by Kiteman 7 years ago  |  last reply 7 years ago

A short video on the subject of Asperger's

Just a bit about the syndrome and that appearances may be deceptive Sorry, I had meant for this to publish in the Asperger's group....

Posted by Goodhart 9 years ago  |  last reply 9 years ago

should I write a novel or short story? Answered

Asked by nerd7473 6 years ago  |  last reply 6 years ago

Our Homemade Short Films

Hi everyone! Just wanted to share with you the homemade short films we make! We, the fathomlis team, and our eldest brother sometimes come together as 'MidNight' to create these. We do the acting, he does the rest. Most of them don't  have a story at all, but with Only a Month we tried to at least have some kind of plot line. Just be advised, These shorts aren't really professional or anything. Hope you enjoy! Comment what you think... Here are a few... Check out the rest here. Fist Full of Mad People: The Recce Fist Full of Mad People 2

Posted by Fathomlis 2 years ago

how to style short hair?

I want to know what i can do with my hair besides wearing a bun

Asked by BizzyLilC 9 years ago  |  last reply 9 years ago

Can I repair a shorted headphone jack with something that only has one ground?

Look at the picture below. The headphones on the left have 2 grounds while the jack that I want to replace it with only has one. Is it possible? Pretty noob question but yeah.

Posted by Zachintosh 7 years ago  |  last reply 7 years ago

Heating element in hair dryer still ON

Hello, I have the hair dryer which have 2 switch one for the blower and other one for heating, when turn the blower ON the heating coil that connected to the rectifier terminal is work ON and the motor work in slow and high (not perfect working) . There is no short in out circuit . Sorry for mu english thanks

Posted by MahdiA19 3 years ago  |  last reply 3 years ago

Head to Head Challenge: 9

Behold, my second attempt at an instructables contest! This is the second installment of the Head to Head challenges, my first one kind of petered out after one winner. :PThe rules are simple: volunteer members will be asked to create an Instructable based on the movie or the short film 9. Whoever creates the better Instructable (higher quality, cooler, featured, most voted for, etc) will win the patch seen below. This time around, there is no deadline (but try to keep it within a month), and you can compete with up to four different people at the same time. Just remember, only one of you will win. I will allow up to four separate competitions, same as the last challenge.Have fun, hope this isn't too confusing! _x_VS._x_ (VS. _x_VS._x_ )_x_VS._x_ (VS. _x_VS._x_ )_x_VS._x_ (VS. _x_VS._x_ ) _x_VS._x_ (VS. _x_VS._x_ )

Posted by Spl1nt3rC3ll 9 years ago  |  last reply 9 years ago

How can I fix a short or broken wire/connection in a USB headset? Answered

I've got a USB headset (that is, stereo headphones with a built in microphone) that has either a short or a broken wire or connection inside of the in-line volume control and the right ear piece only works when the wires are held in perfect position which is really impossible for any extended amount of time. The volume control is just a wheel for volume control and a switch to mute the microphone. I've tried to get it apart along the "seam" but it appears to be sealed somehow and I don't want to irreversibly break it since it's the only one I have for the time being. I also do NOT want to just cut the volume control off an splice the ends together to completely eliminate the problem. I very much need the quick access volume controls as they are. I'm really looking for some advice on how to open the volume control without damaging it further and how to go about locating and fixing the problem. Any help appreciated, thanks. This image contains an identical volume control to mine (different headset, however):

Asked by Darxide23 9 years ago  |  last reply 9 years ago

My 3D animation short Trailer

Posted by maubrunner 4 years ago  |  last reply 4 years ago

Any ideas for a good short film?

Asked by thatshortkid17 9 years ago  |  last reply 8 years ago

Short-term vs. Long-term

My tests got me thinking, since I want to go gaming on Garry's Mod so bad, but then my coalition of brainwaves composed of rational thoughts and my conscience told me that I can achieve my short-term goals (gaming) in conjunction with my long-term goals (owning my classmates in the tests then gaming afterwards) if I achieve certain short-term goals (studying) that would require focus, determination, and moral (can't study when you're depressed). The reason why I posted this here in Instructables is because I wanted to know your opinions about short-term and long-term objectives. Like, which is better, short-term or long-term missions? You would get me if you're in my situation, sitting in front of the computer, worrying about the tests, but then you wanna go gaming. Once I get enough data, I can post an I'ble about my conclusion. Here's what to post: -your thoughts about short-term vs. long-term -opinions -thoughts that pop up in your mind all of a sudden What not to post: -spam -questions not pertaining to the topic at hand -advertising your instructables -posts that only flamers and trollers post -talking about how awesome GMod is (that's the abbreviation gamers gave to it) Also: I don't care how long your post is, as long as it's in the to-post list, it's good to go.

Posted by nutsandbolts_64 7 years ago  |  last reply 7 years ago

Making Sparks!?! I need to create a short circuit.

Well I need to take a very small DC current and up the voltage some so that I can create a spark. I'm pretty clueless here, so can anyone help? If more details are needed I could provide some, but it's for a project that will very likely become my first instructable. Best answer will get a mention in my instructable if I do get around to making it.

Asked by shyguy567 9 years ago  |  last reply 4 years ago

How Do You Get A Video In An 'Ible Without Youtube? Answered

Like the title says. Here are some examples: (Step one pic 4) and (right at the front). I want to know this, because I want to put short vids on my instructables without having a youtube account.

Asked by random_builder 1 year ago  |  last reply 1 year ago

How do i make a coil? Answered

The might sound a bit childish but i want to know about a coil. I am currently making a voltmeter(analog).I need to make a coil for it. I have a magnetic wire(around1.5 meters).Every time I make a coil out of it and supply it with power the battery shorts. I get no responce from the coil(like it does not attracts or repels a magnet or nail).So how do make a correct coil for my voltmeter and how do i know weather it responces.

Asked by flyingdutchmen1659 5 years ago  |  last reply 5 years ago

Why don't AC adapters fry?

I tore open an AC adapter to find out what I was doing wrong in my own power supply attempts. Before any other components, and connected directly to the outlet prongs, was a transformer. I know that it drops voltage and (by ohm's law) the amperage as well. But how does its survive the process? Why doesn't it have huge amounts of waste heat the way a current limiting resistor does? Why doesn't the primary coil of the transformer--effectively a tiny wire short circuiting an AC outlet--burn up? I'm certain this has something to do with the impedance of an inductor, but I just can't figure out what!

Posted by TheCorsairMalack 3 years ago  |  last reply 3 years ago

can a drive belt from a printer be shortened? Answered

I am trying to find a small belt capable of turning gears in my home built rc car, but all of the belts i can use are too long, does anyone know if there is a way that i can make the belt shorter so it wont be too long? i need it to still be in a loop. i only have one right now, so if someone could tell me a way of getting this to work that would be great.  so can someone help? and if it is possible, when explaining how to reconnect it, pictures could help a lot in explaining this

Asked by zack247 8 years ago  |  last reply 8 years ago

Short range serial data link. Answered

What is the cheapest way to set up a short range (200m) serial data link? Also, what are the best options for secured and unsecured links?

Asked by alexhalford 9 years ago  |  last reply 9 years ago

Fixing a old tv that shorts out?

So i have this old Magnavox projection tv, hasent been run in a long time due to a shorting issue between a heatsink and something (its been so long that i dont even remember) I can plug it in and find excatly where its shorting but i dont want to fry the tv... I do remember that it is one of the heatsinks by the flyback that it arced from. I also have the basic wiring diagram for the tv, but it only shows how to adjust the picture, what connects to what and, what wire is what. Should i try and turn it on again and find where its shorting and possably fix it, or just call some tv repair guy who knows more of what hes doing.

Asked by knexsuperbuilderfreak 4 years ago  |  last reply 4 years ago

why are my 18650 cells shorting? Answered

After realizing lead acid batteries are sooo 1859, I decided to construct a battery pack out of 18650 cells. I soldered 4 in series on the top half of the cells. When I went to do the bottom half I found that touching the wire from one negative terminal of one cell to the positive of another cell it short circuited. At first I thought I had a bad cell so I checked all of them and they were all fine. I desoldered them and tried putting only 2 in series, same thing. The cells still put out ~3.7 so I don't see the problem. please help. 

Asked by fossilshark 3 years ago  |  last reply 3 years ago

LEDs with short leads causing problems? Answered

So for Christmas i got a bunch of these leds from amazon and im making and led cube with them. the problem is the leads are so short i use copper wire to give some space for each LED. so for instance its    [Cathode]-----copper wire-----[Cathode]     . But as i solder one end of the copper to one cathode, it will melt the connection at the other end causing me to re-solder once it cools, sometimes it total luck that it stays.  So if you can understand this, does anyone have a more productive way to make this cube?  (and please dont say get LEDs with longer leads)

Asked by texpert 7 years ago  |  last reply 7 years ago

Connection of VERY short nichrome wire? Answered

I have a VERY short piece of 32 gauge nichrome wire that I want to connect to 2 copper wires. When testing, I have connected them like on the picture, using tweezers and a pair of pliers. But I really need to find a more professional and durable way of doing it. It's important to keep as much as "free" nichrome wire as possible in the middle. I don't want to waste all the length inside a butt crimp, or wrapped around the copper wire. Is there a tiny, minitature terminal somewhere, that only steals 1-2 mm of the nichrome wire? Or am I wishing for something impossible?

Asked by karolina81 1 year ago  |  last reply 1 year ago

How to connect computer power supply in series or in parallel? Answered

I have about 5 computer power supplies and i want to connect 3 of them in series but they short circuit each other how do I remove the short circuit protection?

Asked by theVader75 7 years ago  |  last reply 6 years ago

Micro sstc trouble Answered

I am trying to build the micro sstc by steve ward. My circuit  behaves like there is a short somewhere, but I checked  all the connections. The mosfet isn't connected yet and the 555 timer is getting hot, any ideeas?

Asked by theVader75 3 years ago  |  last reply 2 years ago

Replying from Email notifications

When I am in my email, and also have an Instructable tab open, and click on the reply link to one of the replies listed, I am normally taken to the page, and I have to scroll down to find my "entry box" already open and ready for me to reply. That is ok. However, if the reply sent to me is off the first page, I have no way I can find to "page forward" There appears to be no link at the bottom enabling me to "go to the next n+ pages. This only happens when I come in directly from an email is fine if I am already in Instructables and view a forum longer then one page.

Posted by Goodhart 10 years ago

Is there an easy way to find a short or open circuit in a car?

I am trying to find a open or short circuit that is on a wire which is in a harness with other wires, on a 1986 Mazda B2000 truck. With so many of you having expertise in electronics, I thought here would be a good place to post my question. Does anyone have any suggestions how to find this open or short-circuit?I am open to the idea of getting a short-circuit-finder. Though I am not sure what features I should look for if I decide to get one. Does anyone have any suggestions?a) Does anyone know if these work well?b) What features should I look for If I get one?c) Do you have any other on a short circuit finder? type, manufacturer, model etcBelow is a link to a site that uses a short circuit finder to find a short circuit, and has information on using one: is a link to a site that tells about how a tone generator is used to find a short circuit, in a home environment (I think this is how most short circuit finders work): found some links that seem to show that it is possible to make a signal generator and tracer, but the pages with the schematics would not load. A list of tools with links to tools and their schematics tracer (neither of these would not load 4-3-09 kept getting message "the Connection was reset."):should have schematic: the signal generator: little paranoid voice thinks this Instructable has some clues to the solution: How to prevent thefts steal your motorcycle for less than US$ 2 Thank-you in advance,

Posted by Jonque 9 years ago  |  last reply 3 years ago

Small proximity sensors with short range and alarm either IR or RFID

I would like to make two key fob sized units that if brought within ~20cm of each other would sound an alarm from one of the units. I've seen a pair of key fob sized RDIF alarm tags that sound an alarm in one if moved more than ~10m apart. They sell for ~$50 US but I need something that accomplishes just the opposite from this device. I want to keep two pets away from each other (one bullies the other) and such a device would I believe accomplish this task. It seems like it should be relatively simple to design but I'm an artist and machinist and know little about electronics. I purchased a book entitled Practical Electronics for Inventors that has given me some knowledge about the basics of transformers, relays, capacitors, resisters, etc. but nothing on IR or RFID transmitters/receivers. Everything I read about RDIF is geared towards one stationary reader (or large hand-held unit) and one or more transmitters. I made one collar with an IR receiver from an R/C car and a small piezo alarm that would sound when I pushed a button on a remote. This works but only if I'm in the same room with the offending animal. I need something that works when I'm away or the animals are upstairs or in another part of the house. They are indoor only pets so the device need not be weather-proof. Anyone with knowledge of such things want to lend me a hand?

Posted by bigdaddyjt 8 years ago  |  last reply 4 years ago

Here's my first short film. Would you like an Instructable on how to make an indie movie from A to Z ?

Hi guys, I'm a french DIYer, and I wrote, produced, directed and edited this short movie called Sutures in one month : (better use good headphones / a subwoofer). I'd like to get some feedback on it, and I'd like to know if you guys would appreciate an Instructable on how to make something like this with very few resources and time. Making this Instructable will take some time (I like to do things the best I can), so I think I'll do it if some people are interested. There's not a lot of resources about video and filmmaking on Instructables... Please tell me what you think. Thanks for your interest, Mid.

Posted by MidnightSon 6 years ago  |  last reply 6 years ago

continuity between 3.33v and gnd on atx psu?

Im converting my atx into a bench psu. I was checking the continuity between 5v and gnd that i connected to the LTC3780 and i got a beep (one short beep). So i checked the rest of the lines and 5v and 12v also 1 short beep. However on the 3.3v. i get  a long continuous beep. Is this behaviour to be expected?  thank you in advance.

Asked by icey.hood 1 year ago  |  last reply 1 year ago

Small, affordable soundbite player? Answered

I need a relatively small and cheap way to play a short soundbite, anywhere from 5 to 10 seconds and I am curious if any of you could point me in the right direction.  Tips on small effective speakers would also be helpful!

Asked by seedorfj 4 years ago  |  last reply 4 years ago

iPod touch 1st gen failing to boot?

I have an iPod touch 1st gen which is quite old and is on it's third battery. However, it often won't boot with the back on, which suggests a short, but I have visually checked the connections and they all seem ok, and I have even covered them with tape, but I still get the problem. I then thought it may be shorting elsewhere on the board so I have covered other areas in tape which may be close to the edge of the enclosure, but I still have the same problem. Even if I do get the case on without it initially dieing, it only lasts a few days before the back has to be taken off, then it works again. I may just buy a new back as they only cost about £6, would this be the best solution?

Asked by andy70707 7 years ago

How is a large building wired up? Answered

So, recently, I was at school, and trying to use my laptop charger ( I was the only person in the room to be doing so) However, it didn't work. Using it at home, however, it instantly kicked the RCD or safety switch thing off, switching off everything running off the mains Upon further inspection, I found that the power cable had been damaged, so that the active wire was in contact with the ground wire. My question is, how come the power at school didn't get shut down completely ( the lights were still on, and wall outlets in other rooms around the school still worked) but at home, everything was completely shut down. I thought that there'd be at least a fuse or something, if not a safety switch...

Asked by .Unknown. 7 years ago  |  last reply 7 years ago

IR receiver and output over short distance

  I want to set up a short distant IR sensor(<1"). I just want it to register when something is between the two items. Its a pretty simple circuit I just have no experience with optical receivers. Any help would be greatly appreciated, thanks  

Posted by stino66 7 years ago  |  last reply 7 years ago

Remove short-circuit protection from a psu.

Hi, i'm new here and i have a little problem. I want to make a soldering iron because mine is broken. I have a ATX PSU, but when i short circuit the 12v(16a) output the PSU shutdown. I want to remove the short-circuit protection  from my psu, how i do ? I'm begginer in the electronics, so please help me step by step. BTW, Sorry for my crappy english, i'm just a romanian guy :P

Posted by GFXMihnea 6 years ago  |  last reply 6 years ago

Help with coursework, short survey on teenage drinking?

This is a short piece I am doing on underage drinking for a paperAge? How much of a problem is teenage drinking? (0 = No problem, 10 = Huge problem)Briefly explain the answer given above (optional) :…What age do you think is appropriate to begin drinking? What do you think the legal age to buy and drink alcohol should be? Do you think alcohol should be illegal?Yes/NoDo you think teenagers ‘binge drink’ more than adults? Yes/No

Posted by chimpanzeeboy 9 years ago  |  last reply 9 years ago

Short range radio pulse transmitter design?

I need something simple to transmit pulses 2-3 meters to a receiver The transmitter will output a pulse every few seconds, transmit a small burst at X frequency. The receiver then outputs a short high pulse/outputs high for the duration of the received pulse. I want this to be as simple as it can possibly be, cost being the primary restriction and power usage being also of fairly high importance, so please no suggestions of Bluetooth or xbee type systems. It does not have to be a radio based system, however it needs to work without line of sight and of course without connecting wires. If it helps the overall aim is a 'safety signal' that will set of an alarm at the receiving end if several pulses are missed Anyone? EDIT: To clarify I am looking for simple, like really simple. So the transmitter is just a resonator and antenna. What I need is a simple receiver that will respond to a specific frequency, on or off. Does such a thing exist? 

Asked by Damp Cuttlefish 6 years ago  |  last reply 2 years ago

Nichrome wire rope cutter

I've recently started working on a nichrome wire rope cutter. I've built a prototype that uses 2 9V batteries that connect in parallel to a 2" piece of 24 AWG nichrome wire. It works, but burns through the batteries within a minute of running them before they don't output enough current to heat up the wire.  I would like to improve this by turning it into something that is much less likely to burn itself down, or electrocute me in the process. I've been looking into ac to dc converters so I don't burn (almost literately) through 9V batteries. I'm kind of a bit hung up on the electrical engineering portion of this however. If I were to use something like a 12V 5A power supply, and then nearly short it with the nichrome (a resistance of .2477 OHMs) is the adapter limited to 5A, or would something start to melt. I have a feeling I need another resistor in there to reduce the current (if I but a larger PS), and or a potentiometer to dial in the temperature.  Any help would be appreciated.

Posted by halolord01 3 years ago  |  last reply 2 years ago

Disposable camera hack? Answered

Hi, im building a capacitor bank for my coilgun, and I have 17 disposable camera capacitors in them. (wired in parallel (or whatever one means + is atached to +, and - is atached to -)) But for some reason wenever I start chrging it, after a little wile, it makes a huge spark across one of the capacitors. That probobly means its arcing right? but its only 300 volts (there wired in parelell so only the amperage goes up, not the volts). I then tryed to charge the caps to a point before they arced, wich took about 1 min (the battery is full) and my ammo only shot 3 inches! 17 capacitors, charging for 1 min, and it slid across the floor 3 inches! I have no idea what im doing wrong. Im using wire from a microwave motor (wich is realy small) for the coil, and its 5 layers thick, wrapped around a hollowed out pen. So, to sum it all up, here are the main problems: 1) the caps arc when charging 2) the ammo only goes 3 @#%!ing INCHES!!!!!! arg! Ps, i heard someware, that if you have enought amps, it will arc even with lower voltages. Maby thats whats happening? PLEASE HELP!!!!!! :(

Asked by Stuffses 8 years ago  |  last reply 8 years ago

If you spill liquid onto a live conductive thread circuit, will it short out? Answered

Will liquid exposure ruin a live conductive textile circuit? How about if it's powered-down? Can you wash (gently, by hand) a garment with a conductive textile circuit in it? What happens if you're wearing one and you get caught out in the rain?

Asked by Gorfram 9 years ago  |  last reply 9 years ago

broken monitor help?

I've had this monitor for years and now when i pug it into any computer it is black. i know it is getting something to the monitor because when i plug it into a com. it turns a different shade of black. Plus when i turn the monitor off then back on it show me a quick glimpse of what the screeen should look like if it worked. i presume there is a short in the monitor. i believe it is a cft monitor. b4 i open it up i want to know if there is a simple diagnoses. oh and i did try messing with the brightness and contrast. i wouldn't be suprised if i had to open the monitor. i le it sit for a few days to allow the capacitors to discharge. i am really good with a soldering iron so if i have to replace a resitor or capacitor it'll be fine. and p.s. is there a way make a tesla coil out of simple parts like a day creation? and to all those who have jailbroken ipods and iphones with installer is anyone els experiancing problems downloading Cracked apps? thanks -miiwii3 some one help

Asked by miiwii3 9 years ago  |  last reply 9 years ago


The operating frequency will be 49Mhz. what are the required components?

Asked by 9 years ago  |  last reply 5 months ago

How to preset current regulation & short circuit protection ?

Found this awesome diyr Linear power supply design with voltage & current controlling- Foe more details-- 1>Since it has no short circuit protection apart from the fuse,then how to preset current just like bench power supply by shorting the the leads ? 2>Without short circuit protection will the  2 two 2N3055 blow up ? 3>Please assist that what should be done for the modification.

Asked by Dimitrioptimus 3 years ago  |  last reply 3 years ago