My Capacitor Bank

This is a little project I've been working on for some time now, playing with capacitors to see what kind of sparks I can get. I finally decided to build a mounting board for them and glue them all together. You'll see before I glued them in, as I was counter-sinking holes for them to sit in. So far I have MOST of them wired together, in parallel, but I only hooked up the larger ones until I get all the "bugs" wrinkled out. I'm also using a relay circuit to switch the output from the capacitors (so I don't fry myself while they're charging). I have it set up with a 2-way toggle switch, so when I hold the switch to the right, it charges my capacitors, and when I flip it to the left, it triggers the solenoid, and I can then discharge the capacitors however I want. Right now I'm in the process of finding the right power supply, as I have both the relay, and the capacitors charging off the same 12V (1A) wallwart, but it's not enough juice for what I want. Enough to burn little holes in tin foil with the sparks, but It's just simply not dangerous enough for me! Me and nachomahma are working out something so an update will ensue! 

Topic by Punkguyta   |  last reply


capacitor bank questions.

Hello all, this'd be the first post i've ever made, and may be in the wrong place....... edit- i guess it was in the wrong place, since no one replied.... so i'll try here.... i'm tryin to make a cap bank from 30+ flash cameras (possible? possible outputs? how do i calculate that?)  and i have some question/problems. is it possible to take a bank like the above and use as a spot welder?   if so, how would i trigger the spark without the trigger becoming the spark gap?  another possible use i have for it is a rail gun...... theoretically, if counter evidence isn't provided by all of you much more tech inclined ibblers a second concern is that the caps come in at least three different micro farad ratings. would one explode if it's rating is lower than the higher ones?  (the ratings are between 80ish to 150 ish (don't remember)) i rather need the weilder for a possible steampunk project that i just bought a bunch of metal junk for....(knowing me though, i'll never get around to doing it....)

Topic by badideasrus   |  last reply


Coilgun Capacitor Bank? Answered

I am building a coilgun for a high school project. The capacitors for the original design call for 2200uf 400v capacitors, but these are too expensive. I found some 1000uf 200v capacitors, would these still be powerful enough if I run 5 of them in parallel. Does the voltage make the coil stronger or is it the capacitance. My coil specifications are; 16 AWG 4 layers and 25 turns on each layer

Question by joselalala   |  last reply


Capacitor bank troubles

I have wired 5 capacitors from disposable cameras in parallel and reattached them correctly to the charging circuit of one of the cameras. They charge as usual, but using my multimeter I find it only charges to about 330 volts. Also, when I touch the two ends of the wires I have hanging off to shock things are touched to a piece of metal, the spark doesn't appear to be louder, brighter, or any more intense. I have included a diagram, so please tell me if there is something I am missing. My goal is to create either a coil gun, or a "flash plate" where I have about 30 camera flash bulbs on a breadboard all linked to a very large capacitor bank to try to get an almost violent flash able to be seen for miles. So far I haven't even been able to light up a flashbulb that I have hooked up to the capacitor bank. Here is the setup:

Topic by Spitster1   |  last reply


Charging a capacitor? Answered

Recently I've had an idea for a project that requires a relatively low voltage (5 to 30 volts) capacitor bank. However, that capacitor bank needs to be charged. While I do know you can easily just hook it up to power, I find that too simple, and lacking of safety, and knowing when it is fully charged. So, could anyone please enlighten me on how i can charge my cap. bank relatively slowly, with, say, an LED that lights up when charged (to avoid them blowing up in my face), and a kill switch/button that discharges the capacitor bank in the event of an overcharge. If anyone could provide an explanation or circuit diagram that would be great, thanks. BTW, the capacitors I was planning on using are http://www.goldmine-elec-products.com/prodinfo.asp?number=G17623 or http://www.goldmine-elec-products.com/prodinfo.asp?number=G16573.

Question by LiquidLightning   |  last reply


Capcitor bank

Could someone post an instructable for a huge capacitor bank?

Topic by starwing123   |  last reply


Explosive Fun with a Capacitor Bank

Watch a 24kj capacitor bank as it discharges through various objects. Maniacal laughter follows each one and a slo-mo montage finishes it all up. via Make blog

Topic by fungus amungus   |  last reply


Will a mixed-capacitor bank work? Answered

If I have an assortment of capacitors - all different voltages and farad ratings - and wire them in parallel to make a capacitor bank, will it work? Any comments or suggestions welcomed.

Question by rogers236   |  last reply


Capacitor question?

I would like to know if I can hook up a capacitor to the incoming power being generated by my windmill so I can up my outage? I've been reading that you can use a capacitor bank to step it up. Thanks?

Question by swat420   |  last reply


Capacitor-bank safety issues

Okay, so I'm going to be the wet-blanket old guy.... Has anyone considered adding a topic to this group (or an I'ble) on electrical safety with supercaps? Even the low-voltage ones put out tremendous current, enough to put you into convulsions or stop your heart (50 joules) if applied correctly. These devices are amazingly cool to work with -- better than batteries when you need high current, outstanding AC line filters, and terrific party toys when you need some bang for your buck. They can also turn around and bite you on the arse without warning...

Topic by kelseymh   |  last reply


Banking capacitor for household electricity

Anyone here knows how to make a banking capacitor for residential? what is the right capacitor and value for the electricity banking?

Question by dangzching   |  last reply


Charging a 8kj capacitor bank

Hello I have a 8 kj capacitor bank and am looking to charge it with dc power I was wondering if I could use a power supply such as this: http://my.rs-online.com/web/p/embedded-switch-mode-power-supplies-smps/8399698/ Any feedback will be helpful Thank You-TDC

Topic by ThinkDesignConstruct   |  last reply


Capacitor bank charger question.

I know alot of people use a standard disposable camera's circuit board as a charger for coil guns, but would this be sufficient for a bank of ~20 of those capacitors? If not, what would I use to charge it? They are 330v 80uF capacitors, by the way. EDIT: Or would there be a way to modify the existing charger circuit to charge the larger amount of capacitors?

Question by Rokko8652   |  last reply


Charging HV capacitor banks

I noticed that recently a lot of users are looking on information on how to charge capacitor banks. Not going into the legal aspects here when it comes to coil guns, EMP's and similar applications... I do have a few options at my disposal depending on how fast the charging needs to be but for serious applications with high power levels, fast charge rates and so on it soon becomes very technical. The differences between the US mains power and the rest of the modern world only complicates things here. So I was wondering who already build some decent cap charger based on inverter technology and if these people are willing to share their info and schematics for reference - if you already have an instructable explaining it a link to it would help heaps. Considering the costs of high performance caps circuits with proper protection against overvoltage and with good current limiting properties would be prefered over simple circuits that could damage the caps. Thanks for your help!

Topic by Downunder35m 


Is this capacitor bank enough for Railgun? Updated

I have connect the capacitors (5 of 150v 330uF and 1 from Fuji-film cracked camera which has already connected to the charge circuit board, so I don't know the detail) in parallel. Is that enough for Railgun?  I have made rails with copper 5x15 cm. I'm not sure that it will work. Update.................................... Now I change them to be  5 of 350v 47uF and 1 from Fuji-film cracked camera which has already connected to the charge circuit board. And increase the size of the rail to 10x2 or 3cm per one copper plate.  Is that enough? Or should I change something more? Because I have seen somebody use only 3 of the camera flash capacitors and it works. How do you know that it's ok or not? @3@ Thank you...

Question by himuken   |  last reply


How i can make 400dc-450dc from a 9 volt battery??

I want to charge a capacitor bank of 400-450volts, but I don't know how.

Question by Kurt Gerhard   |  last reply


Capacitor Power

I want these so badly, and I live relatively close (about 300 miles away).http://cgi.ebay.com/Qty-46-Pulse-Capacitors-7000v-230uF_W0QQitemZ200268515465QQcmdZViewItem?hash=item200268515465&_trkparms=39%3A1|66%3A2|65%3A15|240%3A1318&_trksid=p3286.c0.m14You can make one heck of a capacitor bank, releasing almost half a megawatt in a split second.My only problems:I don't have 1600 dollars, crycry.These things are so large that if I were to line them up side by side (so that the thinnest parts create the overall thickness) it would be 25 feet long, 14 inches wide, and almost a yard tall. THE POWER BOGGLES THE MINDI'm so mad, if I was an adult I'd buy these in a heart beat... sigh... deal of a life time... I hope not...and best of all, they are PULSE CAPACITORSthoughts? comments?

Topic by guyfrom7up   |  last reply



Can you make your own Capacitor charging Circuit? Answered

I have a Cap bank, but i need some way to charge it without using a camera  circuit. I have pretty much every component that could be required, so if someone could please make a schematic (even if it's done in paint) that would be great. Would also be useful to anyone else making a cap bank as well. Thanks.

Question by Downcount   |  last reply


Coilgun Capacitor Question?

I have a big capacitor that I found in my old xbox. It's 250 volts and 470uF. Would this be better than using a bank of 8 camera capacitors?

Question by Shadow94   |  last reply


Capacitor bank for Coilgun help please!

I havetwo 680 uF capacitors, rated for 200 volts.. And I want to use a disposable camera charger to charge them both. The camera charger stops at 300 something volts, and when I wire them up in series, I get 400 volts, right?.. I want to charge them and discharge them into a coil of wire to launch a projectile at a fair velocity. , I can work with up to 10k wraps of wire, and i have only two capacitors and a major one.. First 2: 680 uF 200v 680 uF 200v Major one: 180 uF 400v Now I imagine I'd get more joules with the two smaller ones than the big one because of the microfarads, right? These specific type of capacitors are made from Elite, and are electrolytic I think, and I got the major one from a computer CRT monitor, and the two smaller ones from a computer power supply.... I also have a 3.3uF 50v capacitor. Now the question is: Can someone help me add these together to increase maximum joule output? I want to hook up the two 680 uF 200v capacitors in series to get a maximum voltage of 400. Then I want to add the major capacitor, which is 180 uF in parallel with the two other capacitors to increase microfarads, in this case, it'd be: 680 680   + ------- = 680 (because they are in series) ------- + 180  = 860 I want two capacitors in series, and the major in parallel, increasing voltage to 400 volts, and the major capacitor doing nothing but adding capacitance (IF possible) Sorry, this is alot to ask for you guys to answer, If none of the above can work, What would work better, the two 680 uF's in series, or one big 180 uF 400 volt capacitor? I apologize if I cannnot explain my question properly.... it's very hard to understand capitance and series/parallel blah blah mumbo jumbo. Thank you.

Topic by Justdoofus   |  last reply


HV capacitor bank charge indicator?

Hello! I have a capacitor bank with three 330v capacitors (from disposable cameras, of course... those things are awesome) connected in parallel, but I'm planning to add more. I'd like to indicate when the device has been charged using an LED, but I'm pretty sure that most LEDs can't handle 330v. The disposable cameras often have indicator lights, so how do they do it, and how can I implement it with more capacitors?

Topic by SirCheez   |  last reply


Questions about Capacitors Answered

Does the capacitance stack in a bank? Does the maximum allowed voltage? How do you wire an SCR? How do I determine what the total output voltage/amps will be?

Question by DELETED_Fuogger   |  last reply


What is the best form of charge a capacitor bank?

I want to charge a capacitor bank of 450 volts, 4000-6000 uf. With dc. I have these ideas to charge it: Cockcroft walton Flyback  What is the best way to charge it, i want that the charge time be like 2-10seconds Thanks

Question by Kurt Gerhard   |  last reply


What is the usual ratings for a capacitor in a disposable camera? Answered

I am wondering so that I can calculate the output power of my small capacitor bank-in amps and joules.

Question by wii552   |  last reply


What amperage will I get from these capacitors?

Alright I am finally getting around to making a coil gun, I made a measly bank of 30 330v 100uf capacitors, totaling 3k uf. However, I just took apart a big ass power supply for battery banks, now I have two coke-can sized 250 volt capacitors, each rated 4400 uf, and I am going to hook them up in parallel, making it an 8200uf capacitor bank, to charge with camera flash circuits in parallel as well. Thing is, I need to find a relay that won't blow up from this, so what kind of amperage will I be getting sending this through a coil?

Question by XOIIO   |  last reply


Capacitor Bank charger without flash circuits

I want to make a capacitor bank and cant find a charger circuit. I cant seem to find any secondhand disposable cameras and would greatly appreciate help making one without the circuit.

Topic by uditkotnis   |  last reply



What voltage should a 5000 Joule capacitor bank be for a TEA nitrogen laser be? Answered

I am building a TEA Nitrogen laser and I will be using two 5000 Joule capacitor banks for the two capacitors.  I am wondering what voltage should the two cap banks be at for the laser.  All help is greatly appriciated.

Question by john7z7   |  last reply


When building a capacitor bank, is it necessary to have a charging circut? Answered

So, I am going to build a capacitor bank in parallel, only a few regular caps from cameras, how would I go about charging these? Do I have to use the circut or can I just hook the battery to the bank for a bit?

Question by Speedmite   |  last reply


charge a capacitor with a bug zapper ? Answered

Can i charge a capacitor rater for 450v 680uf with a racquet shaped bug zapper's circuit.

Question by mind power   |  last reply


What happens when you connect capacitors in parallel and series?

Does it raise the voltage rating if connect in parallel? I am going to be usin the capacitors for a coil gun, so I want the maximum voltage without having to buy bigger caps. Thanks

Question by qwertyboy   |  last reply


In a capacitor bank for a coilgun, must all the capacitors have the same farads and voltage?

I am wanting to create a coil gun, however I accidently picked up two polorid disposible cameras. Now, I have 5 330v and 120uF capacitors, and 2 330v 80uF capacitors. Will this work, and what will be the voltage and amperage going through the coil?

Question by PKTraceur   |  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


My coilgun capacitors aren't going above 30v

I made a coilgun out of disposable cameras. i have 6 capacitors running in parallel. I followed these instructions  https://www.instructables.com/id/DIY-How-to-make-a-coilgun-from-disposable-camera-/?ALLSTEPS   .When i power it on the capacitors make their usual noise and they start charging fine then when they hit 25-30v they shut off and don charge any further. What is going wrong? The power source is 2 AA battery running in parallel 

Topic by eric95204   |  last reply


how many capacitors should i use Answered

How many phot flash cpcitors from disposable cameras should i use minimum to make this plasma rifle https://www.instructables.com/id/How-to-build-a-simple-Plasma-Rifle-aka-Electrother/?

Question by milamber   |  last reply



Bug zapper to charger coil gun capacitor banks?

 I took apart a bug zapper hooked it up to my multimeter and got 1500VDC . I'm currently using camera flash circuits to charge my banks. the bug zapper  wont charge them, how come? I would only have it on for a second and its a very small converter circuit. Capacitor banks= 330v 120uf 

Question by wolf08   |  last reply


Can a laptop charger be modified to charge capacitors?

Well. I've been wanting to build a coilgun for some time now, so I decided to look into it. Capacitors are safely (or as safe as you can get) charged with DC current (batteries). But I don't want to go out and buy batteries whenever I want to use the coilgun. So... can I somehow wire it to charge a "capacitor bank". I was thinking start somewhere with cutting off the computer-plug?

Question by Crail   |  last reply


Is there any way to change the capacitance on a leyden jar/ bottle capacitor? Answered

I am trying to build a capacitor bank for my tesla coil. I am running two 15 kv transformers in parallel for 120 mah. I was running a bank of 7 .015 mf capacitors with 4 wired in series on each one but they burn out incredibly fast. I need a way to build my own that will either withstand the heavy stress or are simple to replace. Either way they need to be the exact capacitance of my tesla coil.

Question by crazy coiler   |  last reply


Help Charging my Capacitor Bank Without Tripping The Breaker.

Hello. I need help with charging a capacitor bank I have. It consists of 10 capacitors: 4 4700uf capacitors and 6 6800uf capacitors. All are wired in parallel. I have been charging them with 110AC rectified to DC. The only problem is that whenever I flip the switch to start charging, it trips our shop's 20A breaker and you have to flip it back to start charging again. It trips our breaker every time and dims the lights making my dad angry. So I need some tips on what wattage resistor i need to use to keep from tripping the breaker. I experimented with a 10W resistor and that was way too much resistance. I am not allowed to experiment anymore until someone credible can tell me what to do. Thanks for your help.

Topic by tinstructable   |  last reply


welding

I was thinking of making a welder that uses a capacitor bank, and does stick welding (STAW). How would I go about doing this? Any other ideas for homemade welders? A small desktop welder?

Topic by LinuxH4x0r   |  last reply


Cheap Source of high votage capacitors

Anybody have any ideas where i can get high voltage capacitors for building a capacitor bank?

Topic by Marche   |  last reply


How to CORRECTLY set up capacitor bank in series?

On my coil gun I currently have 24 330V 120uf capacitors in parallel. I am using multiple camera flash circuits to charge the capacitors. I want to create 3 capacitor banks of 8 in parallel linked together in series. I understand the concept of series but whenever I do it my coil gun becomes extremely weak. Do I need to switch out power supplies?  Thanks,         Nate

Question by eskibro830   |  last reply



Tripping a 20A breaker

Hello. I need help with charging a capacitor bank I have. It consists of 10 capacitors: 4 4700uf capacitors and 6 6800uf capacitors. All are wired in parallel. I have been charging them with 110AC rectified to DC. The only problem is that whenever I flip the switch to start charging, it trips our shop's 20A breaker and you have to flip it back to start charging again. It trips our breaker every time and dims the lights making my dad angry. So I need some tips on what wattage resistor i need to use to keep from tripping the breaker. I experimented with a 10W resistor and that was way too much resistance. I am not allowed to experiment anymore until someone credible can tell me what to do. Thanks for your help.

Topic by tinstructable   |  last reply


Tripping a Breaker

Hello. I need help with charging a capacitor bank I have. It consists of 10 capacitors: 4 4700uf capacitors and 6 6800uf capacitors. All are wired in parallel. I have been charging them with 110AC rectified to DC. The only problem is that whenever I flip the switch to start charging, it trips our shop's 20A breaker and you have to flip it back to start charging again. It trips our breaker every time and dims the lights making my dad angry. So I need some tips on what wattage resistor i need to use to keep from tripping the breaker. I experimented with a 10W resistor and that was way too much resistance. I am not allowed to experiment anymore until someone credible can tell me what to do. Thanks for your help.

Topic by tinstructable   |  last reply


voltage vs uf?

If you were building something, say a coil gun, would it be best to use a bank of higher voltage (300+V), lower uf (80-120uf), or a few capacitors of say, 1000uf 50V or lower?  

Question by Spaazztik   |  last reply


How would I wire my high voltage capacitor bank? Answered

So I'm having this project that calls for a high voltage capacitor bank. I bought 10 450V 330uF electrolytic caps and want to make a 2kv (with safety margin) cap bank. I wired 5 of them in series and I end up with 2 sets of caps. My question is how would I connect those sets in parallel? Do I just connect the ends together (exhibit 1) or do I connect all the caps together (exhibit 2)? Thank you for reading!

Question by mr.derpinton   |  last reply


What is a good way to solder capacitors together? Answered

What is a good (and easy) way to solder capacitors together into a bank for a coilgun?

Question by UbuntuNinja   |  last reply