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Search for shorting in Topics


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 :)

Question by The Prickly Potato    |  last reply


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

Topic by DELETED_DerrenBrown    |  last reply


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

Topic by DavidSheldrick    |  last reply


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-

Topic by AUG-5OM3    |  last reply


18650 Battery Question - Battery Powered Heaters

Hi, I have a question before I begin a project.  I have carbon heater fabric that I want to make heated grips for my snowblower with.  I want to connect the ~0.5 meter x 15mm carbon tape to 2x18650 cells. Are there any precautions I need to take to make sure I dont "short" the batteries and cause damage/explosion etc?  I know technically I am shorting the batteries and making heat.. but how do I know if it is damaging the batteries or putting myself at risk for explosion?  

Topic by DanaF5    |  last reply


Maker Shorts Ideas

Hey guys. I have an idea, but I wanted to include you guys in it. I have created the Maker Shorts. Now I am only one guy, therefore I have limited ideas. But I believe that it has potential to be greater, and to have many more items. So I turn to you, the good people of Instructables. If you have any ideas then please tell me. Keep in mind that there are certain things that I wanted to include but did not have on hand at the time, so I did not list them just so you guys could bounce more ideas of one another. So thanks in advance for any ideas that you guys give me ! Remember never give up, it's okay to ask for help, and just have fun ! The Shorts include the following: - Flashlight w/ hip attachment - Swiss Army Knife  -Paracord Key Chain w/ knife and flint striker - Altoids can w/ some string and a tealight candle - Chap stick - Note pad w/ pencil - Sandpaper - Waterproof container w/ survival straws  - AOL Survival Kit w/ knife, compass, snare wire, fire starter, emergency blanket, fishing gear, sewing kit, cordage, safety pins, flashlight, whistle, and flint striker Also here is a direct link:  https://www.instructables.com/id/Maker-Shorts/ Sincerely,  Street-Wise Irish 

Topic by Street-Wise Irish    |  last reply


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....

Topic by Goodhart    |  last reply


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

Topic by Fathomlis  


how to style short hair?

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

Question by BizzyLilC    |  last reply


ATX PSUI shorting out

​Hi everyone, I hope I did this well, first time on this site, this is a question. I want to make my own soldering iron/heating element, I know I can buy them but it is a project of mine and I just want to know how it works and make it. I used to power a copper wire with a 5V ATX PSU at 16Amps, the psu shorted out and stopped. I read somewhere that you can prevent the PSU from shorting out when there is enough resistance on the wire so the current is not too high for the PSU. (Total nitwit on electronics btw) I was wondering if this is true, and how can I build a succesful soldering iron with a PSU, what transistor or what modifications to make. Also, would a longer wire/rod produce more heat than a shorter? red hot would be nice. Thanks in advance!

Topic by JStuyfzand    |  last reply


possible short film title?

Please help me and my buddy are making a little short film to kinda become more popular on youtube and just for fun and its about a guy who can see into the future for only a small amount of time but he has one of his visions and sees them both dead in it. the main film will be them trying to find who the killer is and how they can defend themselves from anyone that could possibly be him/her then towards the end they find the possible killer... i cant really go on from there because i don't want to spoil it for anyone that is interested but we cant really think of a title for it. we know its mainly going to be based around his visions but we want a clever one or two word title that really suits the theme. if anyone can help out with this we will put you in the description and credits it would mean a lot we really have been thinking hard about this. Thanks in advance.

Question by plowface1    |  last reply


Will Shorting the data on a USB port make it charge my phone (or any device) faster? Answered

Will Shorting the data on a USB port make it charge my phone (or any device) faster? I've heard people say that but I'm not sure that's true, If it's true, Why does this happen?

Question by Yonatan24    |  last reply



how do you make shorts ? ?

Question    |  last reply



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?

Question by alexhalford    |  last reply


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?

Topic by kendallickes    |  last reply


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.

Question by knexsuperbuilderfreak    |  last reply


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.

Topic by nutsandbolts_64    |  last reply


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. 

Question by fossilshark    |  last reply


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)

Question by texpert    |  last reply


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?

Question by karolina81    |  last reply


Too Short for an Instructable- free water

A friend showed me this trick at Safeway. If you are thirsty, but either 1) Don't have money on you or 2) Don't want to buy a whole bottle just for a few sips, most food stores are required to give free water to anyone who asks. There will be no signs advertising this fact. Simply walk up to the counter (we did this at a small Starbucks stand by the bakery) and politely ask for a drink of water. My friend received a clear plastic cup filled with water and ice, no charge. Then I walked up and bought a Dr. Pepper, not free of charge.

Topic by Spl1nt3rC3ll    |  last reply



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  

Topic by stino66    |  last reply


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

Topic by GFXMihnea    |  last reply


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

Topic by chimpanzeeboy    |  last reply


Short term Pro account for submitting instructables

This is what I expected by registering. Why can`t I get a single full instructable if I share my own with everyone? I think this is not fair. Now I`m in doubt if I should publish here my little invention just for your profit.. Users should get say a Pro account for a week or perhaps ability to get a limited number of full instructions for each thing they share. Don`t you agree?

Topic by dudenas    |  last reply


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? 

Question by Damp Cuttlefish    |  last reply


Mobile site has no short term memory

The mobile site, when viewed on an iphone, wants me to add instructables from my home screen, even when I've launched instructables from that link I added to my home screen last time I was here.  Also, once I've closed that little box, selected an instructable to read, and started in on it, the page brings me back to the top once it finishes loading. I may be half way through by then. Leave me where I was please.  Also, while this next nit is basically self fulfilling, once I've written a post, why can't I instapost? Why must I preview? This isn't my first time on an Internet. I can read it here on the edit screen. If I've inserted pictures and fancy text and whatnot, I might want to ppreview for formatting, but this is just text. Instapost! (I almost hope I have an accidental carriage return or a line of all caps that I would have caught in the forced preview. That would serve me right).

Topic by gotcha640    |  last reply


Overheating Car - Causes and Short - Term Solutions

Overheating of the engine not only occurs in the summer, but can also occur in daily driving. In particularly, high-speed running cars, engines, and air-conditioning systems can cause boiling phenomenon when the water temperature is too high. It's dangerous to overheat the engine. It may hard luck that what can damage the engine. When driving on highways at a higher speed, or when climbing a car, if the pointer of the water temperature gauge enters the red zone and stays high, appropriate measures should be taken at this time. Here's how to handle the engine overheating.There are many causes of overheating, including insufficient coolant, cooling fan cooling the coolant has failed, thermostat failure, and coolant temperature sensor failure. If you deal with it improperly, it can lead to an expensive engine failure. Therefore, timely detection and proper disposal of overheating can effectively reduce losses.First, poor engine cooling: Poor engine cooling can cause the water temperature in the tank to be too high. When longer the water tank is used, the more internal scale will build up, resulting in poor heat dissipation in the radiator. The water with too high temperature will not release heat, and it will evolve into a "pan". In addition, the ventilation hole of the radiator is also a common cause of poor heat dissipation. If the external blockage is not ventilated, use a water gun to clean it up. If the inside of the radiator is blocked, then clean it with a cleaning solution. Second, the cooling system is not working properly, resulting in poor heat dissipation. At this time, check the tightness of the fan belt and whether the fan blades are deformed or broken.Third, the thermostat automatically adjusts the amount of water entering in to the radiator according to the temperature of the cooling water, so as to ensure that the engine works within a suitable temperature range, which can play a role in saving energy consumption. If the engine is overheated, check that the thermostat is working properly. Starts at 70°C and fully open at 83°C. When the height of the fully opened valve is not less than 9 mm, the thermostat can be put into the water for heating inspection. If the thermostat can't be opened or the opening degree is not enough, the thermostat needs to be replaced.

Topic by violantez    |  last reply


What's Wrong? Electric Bass Feedback

I own a Ibanez Ergodyne EDA 900. When ever I touch the 3rd string (D string) Tuning knob, bridge, any metal touching it, I get feedback sounds to my amp. What's wrong with it. It's not the amp because I tested it with my friends bass. *** I Still don't know what happed but after i took it apart and checked all the conections (nothing wrong) I blasted all the dust out of it and IT WORKED FINE.

Question by maxxxem    |  last reply


HOW TO BUILD A SIMPLE WALKIE TALKIE FOR SHORT DISTANCE?

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

Question    |  last reply


How to preset current regulation & short circuit protection ?

Found this awesome diyr Linear power supply design with voltage & current controlling- Foe more details--http://electronics-diy.com/power-supply-lm317-2n3055-0-28v-6-8a.php 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.

Question by Dimitrioptimus    |  last reply


12V DC adapter + incandescent= short circuit? help!

Hello! I have had an issue where i wore up a 12V DC adapter to a incandescent (halogen) bulb. wjen i do this, i believ it set of f the short circuit protection thingy in the 12V adapter.

Question by Cheesey125    |  last reply


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: http://inliners.org/tech/tech6.htmlBelow 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): http://askville.amazon.com/tone-gene...uestId=5912724I 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 schematicshttp://www.qsl.net/kc4gzx/kc4gzx/project20.htmCircuit tracer (neither of these would not load 4-3-09 kept getting message "the Connection was reset."):should have schematic:http://circuitos.tripod.cl/schem/r111.gifand the signal generator:http://circuitos.tripod.cl/schem/r25.gifA 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,

Topic by Jonque    |  last reply


Why is my 12v battery pack is short circuiting?

So. I made a simple circuit. 12v volt battery pack>on/off switch>two 12v led strips. The strips ran fine for hours, but when I turn the switch off, the battery pack short circuits. What is it I'm doing wrong/ not doing?

Question by redhanddead    |  last reply


i am short on pieces. please help me? Answered

I probably have enough to make some thing. I want to build a crossbow but I don't know any low piece usage ones. pleeeeeeeeeeeeeeeeeeeeeeeeeaaaaaase help me!

Question by chopstx    |  last reply


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.

Question by shyguy567    |  last reply


Is it possible to wipe built in phone memory by shorting it out? Answered

I have a Samsung phone, model SPH-M510, for 30$ It was given to me so for me to find out the forgotten password.. ( you know this story ) rather than trying 17 000 passwords, I was curious as to wether the built in memory could possibly be shorted and wiped, or if there was some way to access built in memory. ( not stuff on the card ) If anybody knows any ways to get in, please enlighten me. Thanks in advance.

Question by jacob5680    |  last reply


PSU shorting out when trying to power stuff?

I'm trying to build a bench top psu from a computer psu and so far its going good, except for one thing. I recently scrounged a 12v air compressor from a buggered car battery jump starter, and it runs fine, but whenever i connect it to the 12v and ground cables on the psu the psu just shuts itself off, does anyone know why? or what i can do to stop it from doing it?

Question by jockkitto16    |  last reply


very short survey on user experience of DIY services

Hello all together, my name is julian and i am a student of visual communication in germany, rather at the "Fachhochschule Aachen" a university of applied sciences. My current project is based on the user experience on DIY services and it would be very great, if you could answer those ten questions. http://de.surveymonkey.com/s/G5MW5ZF If there are any questions or suggestions belonging to the questions please write an e-mail to: juschimcgyver@gmail.com Thank you very much ! juschi

Topic by juschi    |  last reply


How to isolate a battery pack from a controlled short?

so i am trying to make a portable electric stove and am trying to isolate the heat coil from the battery pack itself i know there is a way of doing this however for the life of me i cant remember how it works or what it is called. any help would be greatly appreciated! [edit] so there was some confusion on what i am trying to accomplish. i keep burning up batteries (when i say burning up i pretty much mean just that.) they don't like being connected to circuit that's sole purpose is to short out (albeit in a controlled way.) i wanted to isolate the batteries from the part of the circuit that is shorting to create the heat. if that still doesn't make sense or you think my problem might be something else entirely, please let me know. also so you know what my circuit looks like. it is a battery box power supply soldered to my heat element as well as a variable resistor to allow me to change heat output. hopefully that helps clarify.

Question by siege10    |  last reply


what's the best battery type for charging in short bursts?

I want to make an off the grid power supply and inverter and i want to power it with a bike mounted on a small motor/generator that would power a battery or just something that would store that energy and then use it for a couple of lights or something. i have very low stamina but a good amount of strength, so i'll probably be riding it for a few minutes or less, watch some tv or something, then ride some more for a few more minutes, rinse and repeat. i know if i used nicd for the battery, it would last a few days because of memory effect. i don't know a lot about other battery chemistry types and i want to know if this type of charging would be too abusive for a battery to handle, and if not what type can i use?

Question by the judge    |  last reply


Short throw projector w/ auto pwr on/off

OK- looking to upgrade an exhibit that is currently using two old kodak slide projectors on an image blender to a screen that is only about 5' from the lenses. This is a rear projection scenario and I need the following criteria met: Projector must be capable of throwing up a 62" diagonal image from only about 5', maybe a few inches less. The projector must be able to be programmed to turn on (main and lamp power) and off at certain times. Whether this is done via the firmware (menu settings) in the projector itself or via RS232 commands is up to you but I don't know much about RS232 software and its capabilities as far as interfacing with a projector. I think there might be some projectors out there that automatically power on when a source is detected as well, perhaps this is part of a solution?? The application is as an exhibit in a museum. We can't afford to task someone with physically turning this on and off every day so if the process can be automated, great. This exhibit will ideally rear project an image to a screen that our visitors stand in front of. The image can be supplied by either a looping DVD or from a PC app such as Powerpoint as they are static images. One concern at power off is that power is initially only removed from the lamp of the projector and then from the fan after it has cooled the lamp sufficiently. If all power is removed from the projector at once, the fan will not run and the lamp will fail prematurely. If there are solutions outside of the box like other display technologies that I've not thought of, please share. Large plasma and / or LCD screens of that size however are cost prohibitive. Any help would be greatly appreciated. z

Topic by zootron  


Short throw projector w/ auto pwr on/off

OK- looking to upgrade an exhibit that is currently using two old kodak slide projectors on an image blender to a screen that is only about 5' from the lenses. This is a rear projection scenario and I need the following criteria met: Projector must be capable of throwing up a 62" diagonal image from only about 5', maybe a few inches less. The projector must be able to be programmed to turn on (main and lamp power) and off at certain times. Whether this is done via the firmware (menu settings) in the projector itself or via RS232 commands is up to you but I don't know much about RS232 software and its capabilities as far as interfacing with a projector. I think there might be some projectors out there that automatically power on when a source is detected as well, perhaps this is part of a solution?? The application is as an exhibit in a museum. We can't afford to task someone with physically turning this on and off every day so if the process can be automated, great. This exhibit will ideally rear project an image to a screen that our visitors stand in front of. The image can be supplied by either a looping DVD or from a PC app such as Powerpoint as they are static images. One concern at power off is that power is initially only removed from the lamp of the projector and then from the fan after it has cooled the lamp sufficiently. If all power is removed from the projector at once, the fan will not run and the lamp will fail prematurely. If there are solutions outside of the box like other display technologies that I've not thought of, please share. Large plasma and / or LCD screens of that size however are cost prohibitive. Any help would be greatly appreciated. z

Topic by zootron  


Instructables Podcast 001: A Day Late and a Dollar Short

A Day Late and a Dollar Short. Here is the inaugural episode of the Instructables Podcast: How Do I? We received a lot of what we referred to as housekeeping questions that we felt we should just take care of straight away to get them out in the open. We hope those lay out more clearly what we're doing, and what we're hoping for. We had a two technical glitches where Jake's mic was cutting him off in case you're curious why there's some weird buzzing/cut noises mid way into the file. The two questions we received dealt with adding smoke or sparks to toys and creating vehicles that are powered by the wind. A few references from this episode: Make your own hackerspace/makerspace: http://makeamakerspace.wordpress.com/ http://hackerspaces.org/wiki/ http://www.adafruit.com/blog/2012/11/12/how-to-start-a-hackerspace/ Pope Smoke: http://www.youtube.com/watch?v=zf0gCterxVo Sailing Lingo: http://en.wikipedia.org/wiki/Keel http://en.wikipedia.org/wiki/Tacking_(sailing) Jake and I both had songs we thought would be fun to have as an intro or outro and in the end I just made the decision to use a loop from Garageband (as it was on my computer). It's free, no one is going to get angry, and if something else comes up in the future, we can always update. We're incredibly unprofessional, as you'll gather from our introductions and closings. We might get better at that as we go along, but I don't expect that's going to happen. As it happens, I absolutely love our opening/closing remarks, but that might just be me. You can listen to or download the episode below, listen over at archive.org or check it out at our homepage: download For next weeks episode: If you have any questions (or feedback) you'd like us to field in next weeks podcast, please leave them in the comments below or PM me and we'll do our best to include it!

Topic by StumpChunkman    |  last reply


Discharging high amounts of amperage in a very short time.

Previously I asked this question, except I wanted to build an electromagnetic dent puller. But no one gave me specific ideas or instruction of how it could be done, instead everyone told me different ways to pull the dent out, or how the metal looks.. Anyway. I have a lot of copper wire. And I have a bunch of magnets and ferrous cores, iron rods.. etc. I am wondering if I can create a very powerful burst of magnetic energy with a few winding's of copper around a ferrous core. I'm talking enough to push two very heavy objects apart, such as a television or couch... 1) Copper will be wound around about 40-60 times 2) High amperage discharge from capacitor bank 3) Possible explosion or melting wire? Thank you... again

Topic by Justdoofus    |  last reply


can electrolytic capacitors catastrophically fail or explode if they are shorted out? Answered

My father (an electrical engineer) told me that if a capacitor is charged and than shorted out than it can fail, possibly with explosive results. However I have seen way to many Youtube videos of capacitor banks being shorted and nothing but a big spark happening. Who is right? Can anybody help me?

Question by junits15    |  last reply


I need help with short circuit detector / electronic fuse. Answered

So I'm making a variable power supply with an LM317 and I've decided to add a short circuit protection, I know the LM317 has an auto shutdown feature but I thought this would be a nice feature and it would allow me to leanr more about circuits. The short detector is quite simple, It's a PNP transstor connected to the output. When the output is shorted the LM317 can't supply enough current and the load sucks everything it can, so it sucks the charge of the capacitor, causing the PNP transistor to activate and turn on the relay and the LED. This connects the PNP to ground, making it be permanently oopen until the circuit gets reset. It works flawlessly from 16 to ~9 volts, but I go under ~9v (I don't know why) the PNP activates and the relay flickers very fast, I tried several things but none fixed the problem. I have plenty of PNP nad NPN transistors so if you can come with a better and more stable design I would be able to try it, I'll be all the afternoon trying if I can figure this out and posting some updates. Here's a video of how I want it to work. https://www.youtube.com/watch?v=1nVzUUYPm3w& Look at the image for more information. Thanks in advance.

Question by Victor805    |  last reply