post in the comments your coilgun, capacitor bank, and how your coilgun works. I want to know everything about it. EX: how long your coil is, how many layers your coil is, how you built it, etc. The more you put the better. I also would like some advice on my new coilgun I'm building. I want to use flash-capacitors and 26-gauge wire. I don't want to use a lethal amount of electricity if at all possible. Thanks!

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



Posted by cazmundi 12 years ago  |  last reply 7 years ago

Coilgun or Railgun? Answered

               I want to build either a coilgun or a railgun, using a bank of camera capacitors as the power source.  Experimenting with small coilguns, I've found that the efficiency is very lacking.  I haven't done the math, but five camera capacitors in parallel with a medium-sized coil will barely move a half-inch screw.  So which should I go for for better use of available capacitors--coilgun or railgun? P.S.  I've found places on the internet that give tutorials on making capacitors, which I would also consider doing.  If I'm able to make large-capacity capacitors myself and use those, should I build something other than what I should make if I only have access to camera flash capacitors? P.P.S.  I heard the following rule somewhere here on this site:  "The more amps in a coil, the more powerful its magnetic field, the more voltage in a coil, the larger the magnetic field."  Is this true?

Asked by mad magoo 8 years ago  |  last reply 2 years ago

Multistage coilgun

How do you connect multistage coils on a guil gun. Also what matters for a coilgun the ufs or volts.  

Posted by Kante Tech 8 years ago  |  last reply 8 years ago

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

Asked by joselalala 4 years ago  |  last reply 3 years ago

Alternative power sources for a coilgun?

I was wondering if there was any other method to power the firing coil of a single stage coilgun without using capacitors.  My main reasoning is to try to reduce recharge time, and to also avoid making massive groups of capacitors and finding a place to put them. It needs to be able to be powered by some form of battery, meaning I could connect voltage to this circuit (1.2 volts up to 12 volts.  I'm not picky) and shouldn't consist of hard to find components. I'm not looking for the greatest efficiency in the world, just making a step (okay, maybe a stomp) toward building a 'capless coilgun'.

Asked by Madrias357 8 years ago  |  last reply 2 years ago

Need advice in making a coilgun :)

I'm gonna make a 800v coilgun but i need some help on some things: I wanna put a Voltage meter on my coilgun so i can see the amount of voltage stored on the capacitors, how do i put the voltage meter there? when the coilgun is charging and at the same time i shoot something then will anything bad happen?

Asked by lpetersen2 4 years ago  |  last reply 4 years ago

I'm building a coilgun. Can I leave the charging circuit on while i fire it or would that damage it?

I've seen videos where the coilgun starts charging immediately after the gun is fired so that makes me think you can just leave the charging circuit on.. But something just doesn't feel right about that. Is it safe to do that or should i turn it off each time before firing it?

Asked by paradox116 9 years ago  |  last reply 8 years ago

how to subscribe things to make a gadget? ?

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

How can I get a higher projectile velocity for my coilgun? Answered

I made a coilgun using 8 capacitors of 50V and 4700uf connected in parallel and powered by 4 batteries of 9V each. The coil is wound around a plastic tube over a length of 2 cm. However the projectile (an iron nail of 1 inch just popps out of the tube). How can I fire it at a higher velocity?   

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

The making of a multi-staged coilgun

I want to make a coilgun with 2 or 4 stages; however, I don't have much experience with capacitors, magnetic fields, etc.. I am not really making it now, but its more of preparing the steps so when I do start, I will be able to complete it and be aware of problems that may occur. 1) when the coil is fed with electricity, what is stopping it from shooting right back at you? 2) how much voltage should the coils be using (aka what type of capacitor should I use) 3) I have heard that capacitors will sometimes have left over charge in them, how would I "dump" the excess. 4) Using multiple stages, should all the coils be turned on at once or in succession 5) should the wire coiling the tube be uninsulated? Here is a diagram of my current understanding of a coilgun. Let me know if it is not correct. Power Supply (battery) --> switch --> capacitor -->wire that wraps around the pipe, creating a magnetic field --> magnetic field pulls projectile into the tube and launches it.

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

Could i use an ignition coil and breaker points to fire a coil gun?

I've made one of the basic models i've seen around here, but i was wondering if i could skip most of the painstaking soldering that i suck at, and use car parts. I'd still be soldering here and there, but not tiny camera circut boards. I'm not retarded, i am aware of the high volts at work on spark plugs, so spare me me the "you'll shoot your eye out" type lectures, already tasted that flavor. But would the automotive coil even charge if it is shorted across by the barrel coil? i know breaker type ignitions dont fire till the power source is cut by opening the breaker. but a spark plug is an open circut and i'm not sure if a coil pack will charge if that circut is closed.

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

Coilgun's Barrel

If im building a coilgun could I use a aluminum barrel instead of a plastic one? or would it not work?

Asked by B9 9 years ago  |  last reply 7 years ago

Aluminum Slugs for coilguns?

Throwing around the Idea of a Coilgun , can I cast some aluminum slugs to use with it ?

Asked by tom10122 6 years ago  |  last reply 6 years ago

convert coilgun to railgun? Answered

Can I convert the coilgun into a railgun by replacing the firing tube with two rails? Should the current pass through the rails only for a moment (as in the coilgun)? Which can accelerate a projectile to a higher velocity? 

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

is a coilgun (gaussgun) better than a railgun? Answered

I am writing an essay comparing and contrasting a coilgun and a railgun. i know the differences between the two but i am in need of outside opinions on what is a more effective tool.

Asked by BrendenK2 2 years ago  |  last reply 2 years ago

Connecting the coil and circuit in coilgun

When i connect the coil with the circuit, there spark in the switch. Is it because the switch doesn't strong enough ? The projectile didn't fly.

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

can I make a coilgun using a relay? Answered

I want to know if i could build coilgun with a relay because i know it is an electromagnet and my coil i was using got tangled up.and giv me an idea of a circuit if i can use a relay.

Asked by masterzeb318 6 years ago  |  last reply 6 years ago

What is the purpose of the charger circuits in the coilgun design? Answered

I am a freshman in college interested in constructing a coilgun. I do not yet know enough about electronics to understand the purpose of the charger circuits I see in the designs of most coilguns. I am hoping that someone can enlighten me.

Asked by wft4 9 years ago  |  last reply 9 years ago

Transformer coilgun

Hey i use a camera circuit for my coil gun and the circuit would always burn out so i was wondering if it is possible to just use a audio transformer and if so how please.

Posted by Kante Tech 8 years ago  |  last reply 7 years ago

Help with a coilgun

I recently found four 500v,37,5uf, 10%mkp capacitors, and need help in making them into a coil'railgun. I have done complex electronics before,but never a rail/coil gun. Help?

Asked by Optimus Primerib 9 years ago  |  last reply 9 years ago

Coilgun? Induction? Or something else? Answered

Hi, There video above shows a simple coilgun like device that shoot coins. In my understanding, it looks like a simple induction Coilgun design, since it repel coin away from the coil instead shoot the coin through the middle. However I have a hard time replicate the result. I use the same camera with the same capacitor (350V), and also use penny for the non magnetic projectile. Its the coil part I'm not sure about. In the video, it looks like a relevantly messy and small coil. Can anyone suggest me on the coil design for the same result? Most resources I found are either on reduction design or base on coilgun design instead this simple shooting mechanism. Thanks   

Asked by ljfa321 6 years ago  |  last reply 6 years ago

What kind of SCR would I need for a coilgun with 2500uf 500vdc capacitors? Answered

Using a bank of 6 capacitors, all rated for 500 WVDC and 2500 uF. I'm only going to be mainly using them with 240 and 130 VDC. Would a 500Amp SCR be applicable?

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

Transformer help. Answered

Ok, i am trying to build a charger for my coilgun science project and was wondering if there was a way to hook up a transformer WITHOUT winding any freaking coils. Most help works, thanks.

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

DIY Coilgun very pretty, not so deadly

Want to scare someone with a pretty frightening looking gun? This DIY coilgun will get that job done. With the projectiles going out at only 100 fps this is far from a deadly weapon, but just look at it! The $130 pricetag is almost enough for the looks alone. Full specs below.Fully semi-automatic, up to 14 shots.Capable of delivering over 18J kinetic energy, and speeds up to 110km/h! (42 gram projectiles).It's a single stage gun, using a 8800uF capacitor bank with max 400v (704J).Max shot efficiency is 2.8% but reaches almost 4% at lower voltages.Charge time for 300v (12J kinetic energy 396J capacitor bank) is 8 seconds for the mains connection, and when using the internal batteries about 90 seconds. It also has a Digital voltage display.Coil overheat after 14 shots at 300v.Total weight: 5 kilogram.Total spend: ~ 100 EuroConstruction time: ~40 Hrs DIY Coilgun via engadget

Posted by fungus amungus 9 years ago  |  last reply 6 years ago

coilgun coil with 2 wires to decrease resistance?

After i finished my coilgun. i found that my coil which has a resistance of 3 ohms is not efficient enough for my 1920uf cap bank at 310v. i've read that high resistance coils need high voltages and low capacitance from the capacitor banks. and that low resistance can use both high voltages and high bigger capacitor banks to increase the current and drain the capacitor more quickly  so that the projectile will not be sucked back. so i am wondering if i can wound a coil that has 2 wires to decrease resistance,  the current one is about 30mm in length and have 12 layers of 1.024mm of enamel coated wire. it is just that i don't have bigger wire which has a lower resistance. and i also did not solved my switching problem. i already damaged 3 heavy duty water heater switches here is the picture 

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

how can i make a cap charger out of any disposable camera?

Like this one

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

What excactly is a Coilgun? Answered

Title says it all. I heard some guys in the Tech catagory talking about this.

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

which of these 2 wires should i use for a coilgun?

I dont know which one can be better

Asked by gbmaster137 6 years ago  |  last reply 6 years ago

CoilGun science project

Ok, i'm doing a science project and I chose to use the Coilgun-Handgun Instructable to build a coilgun and test its damage and lethality on human flesh using a piece of ballastic gelatin. Does anybody know if there is a way to measure the damage against the gelatin or another experiment i could do with the gun?

Posted by renkun67 8 years ago  |  last reply 8 years ago

Coilgun stages? Answered

I want to make a coilgun, but i didn't know if I should use 1 or 2 stages. I want to use capacitors  rated 450v, 1000uf, I have ten of this capacitors. Thanks AMD

Asked by Kurt Gerhard 7 years ago  |  last reply 7 years ago

Would anyone be able to help me on a Coilgun?

I'm 17 and building a coilgun. I have prototypes but i have so much power going through it so far that i burn up the charging circuits... 

Asked by Ausi319 8 years ago  |  last reply 8 years ago

What capacitors would be better for a coilgun?

I have two sets of capacitors i could use for my first coilgun, and i was wondering which set would be better and why?(2200uF - 16 volt) <---- Old computer cap.or(120uF - 330 volt) <---- Regular camera cap.

Asked by - Jordz - 9 years ago  |  last reply 8 years ago

coilgun question, could someone explain what an SCR is to me and how to incorporate it in a coilgun circuit?

I am a novice "coilgun maker," and understand all the principals and such involved in it. now that im moving to more advance coilgun design, i need to understand what an SCR is/does. wiki can only teach u so much :D any help or answers to this question will b greatly appreciated!

Asked by asantiago2 7 years ago  |  last reply 7 years ago

Specifics of building a multi-stage coilgun?

So I recently decided that I wanted to build a coilgun. I already knew how they function, and after some light research, I've got the main design already laid out. What I'm looking for now is some more detailed input on the exact power requirements, circuitry, etc. Specifically: Firing a standard .177 steel BB, I want to use many small coils in series as opposed to one/few large ones. From my understanding, this will provide better end speed while keeping each coil's power draw relatively lower, and thus safer. (Am I right about this?) How many coils should I use, what would be overkill, etc? Each coil will be triggered sequentially by a IR LED/photocell trigger system rigged through tiny holes drilled across the barrel. Will a simple on/off circuit suffice, or will the projectile pass by too quickly for the full charge to release? If so, I assume I need a system to trigger a full discharge when tripped. Correct or not, and if so, how? I'm also considering fitting an extra gate at the end to trigger a circuit to bleed any remaining charge. Ideas on this? What size of capacitors should I use, and how would I charge them? The only thing Google can seem to turn up is camera flash circuits, but I'd much rather have one tailor-built to the system's exact levels. I'm going to use a press/hold switch to charge them, and would like an automatic shutoff with an LED that comes on when they are charged, but turns off when I release the button. Kind of like a camera flash, actually. I'd like to fit it with a re-chargeable battery. What sort of power is required here? How many firings would I likely get per charge, etc? What sort of muzzle velocity can I expect? I don't want to kill bears with it, but soda cans would be nice. I don't want to waste my time fabricating it only to be able to stop it with my eyeball. Lastly, are there any other points of concern or things I should know? Thanks for any input, and if everything ends up coming together nicely, I'll be sure to properly document the process for everyone's enjoyment. :)

Posted by Skye Pyro 6 years ago  |  last reply 6 years ago

Spudgun, slingshot, coilgun, paintballgun, airsoft, bow and arrow laws

In Nj, is it legal to own or make a airsoft gun, slingshot, bow and arrow, coilgun, or pneumatic spudgun?

Posted by starwing123 10 years ago  |  last reply 7 years ago

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?

Posted by adrewmc 11 years ago  |  last reply 11 years ago

Is it possible to use a leyden jar as powersource of coilgun?

Asked by 9 years ago  |  last reply 9 years ago

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?

Asked by Shadow94 9 years ago  |  last reply 9 years ago

what is an 12 awg wire?? Answered

On the coilgun instructables it says i need to have 12 awg wire what is that??

Asked by frixx 9 years ago  |  last reply 7 years ago

12kj coilgun help Answered

I have 15 10000 uf 400v 17200 ma capacitors I was wondering what the best way to charge them would be each stage will be ran from 3 caps making 2400j each stage for 5 stages. If there is no efficient way to charge all at once I would like to be able to charge each stage separately.

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

Are capacitor charging circuits necessary? Answered

So I was looking at some coilguns and all of them have a circuit to control the charging, is this really necessary or can you just apply the voltage you want and let them charge.

Asked by 6 years ago  |  last reply 6 years ago

What is the cheapest way to make plasma? Answered

I want to be able to shoot plasma out of a coilgun, but I want to know the cheapest way to generate it and other factors involved in doing this ( I.E. would it melt my gun and how to prevent this.). Any relevant information is welcomed.  

Asked by StartedBullet 7 years ago  |  last reply 2 years ago

Can I Use an LED chaser circuit to make a large, sequenced coilgun? Answered

I saw an easy adjustable speed ten LED chaser circuit on the web and was wondering if I could use it to control relays in a coilgun that would be sequenced and therefore acheive higher velocities than others? Also, could I use a Wimshurst machine and homemade capacitors or leyden jars to power it, or do I have to use a ton of camera capacitors? Thanks!

Asked by mad magoo 9 years ago  |  last reply 8 years ago

Coilgun does not work with capacitor?

I have a coil of 8 layers of 50 loops, so 400 loops. which has a resistance of 0,91 ohm. To power this I use 3 450V 220μF in series charged to about 1000V and when I connect my coil it gives a small spark and the Iron projectile doesn't move. I know the coil works because when I connected it to my welding transformer of 70V It did work. what am I doing wrong?

Asked by stefl5 1 year ago  |  last reply 1 year ago

Magnetic accelerator coil Answered

Im going to try to keep this short. So a friend and I are both sophomores at our highschool and we are both in chemistry (which is a higher level science) and i built a coilgun for last years project and attempted to build a PWM driven one this year. My friend and I want to build a rather large coilgun using either 10 microwave oven caps or close to 40 or 50 caps from computer power supplies. What i need help on is whether we should use the microwave caps which are high voltage but low capacitance or the power supply caps which are 200 volts and around 500 micro farads. I also need help on what wire to use for my coil and how many turns for the coil. i would like help with a coil for each cap size. We are planning on using either a 3millimeter by 5 centimeter long steel rod or a quarter inch bolt. our goal is to at least shoot it through the wall of the physics classroom and maybe through the door of a car. anything helps. Thank you

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

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: Any feedback will be helpful Thank You-TDC

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

[Coil-gun]What is size coil will work best with my capacitors?

I am building a Multistage coil gun and have some 450v 1000uf capacitors. I understand it is important to have the wire size and amount of turns correspond to the capacitor for maximum performance. I have also figured out that the coil should be about twice as long as the projectile. My projectile will be part of a nail.What gauge wire should I use and how many turns should my coil be? 

Asked by eskibro830 4 years ago

Where to Get Charging Circuits other than from Disposable Cameras?

After a month of procrastination, I finally got myself to make a coil-gun by choosing it for a science project. I am going to go to nearby Walmart, Radioshack, etc. for used disposable cameras, but it is unlikely I am going to get them. Since I am pressed for time (2 weeks for creation and experiment), I figured I should just post this now. I know I can get capacitors, but what specification should I look for?( around 400V give and take) Also, I need charging circuits ( or another method to charge it with) but don't know where to get them. Since I am pressed for time and still am a novice to electronics, somethings like a DC to DC HV converter would take too long with my amount of expertise. Please help and Thanks in advance

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