Coilgun

[TheCessnaDriver]

yeah, now intruders can get a torx bit through the forhead!!!

[jrm102]

If it is a weapon you are trying to build, then you failed. Proof of concept, maybe.

[Jalanorian]

You're dealing with so much over-saturation (magnetically) of the projectile, that of course your efficiency is going to go down the tubes.

[js1990wtf]

wow you made the worlds most expensive bb gun lol

[teemune]

@js1990wtf Almost completely out of scrap parts though :)

[Shinhaquro]

That's the fun thing about coilguns or wide-bore air rifles, common household socket driver tools work fine as ammunition!

[aserta]

Do overlapping coils do any difference?

[teemune]

@aserta Haven't tried but a single coil.

[aserta]

@teemune I'll admit i'm not an expert however i do have some acquaintances specialized in this field and in some talks grazing the subject i did hear about overlapping coils. Tough i guess that it requires actual processing, calculation to reach close to max potential, just firing both at the same time won't achieve anything more than just what a longer coil/more power would. Meh like i said not an expert but maybe it will help. It's a really cool concept.

[teemune]

@aserta Might well be something to consider. People do have tens of stages in their designs. Somebody should do some research on overlapping coils. Although the maths could prove complicated since the coils affect each others fields in addition to timing problems. I guess that's part of the benefit.

[Mike0brien]

@aserta Overlapping coils will make a difference. The thicker the coil the stronger the field of flux will be. Especially, if you add a metal core such as iron. The longer you make the coil the more you spread out the flux, so in this case the projectile could be farther away form the center of the core and still get picked up. Problem is coiling it properly, it isn't a easy job. Unless you have a machine. You can do it by hand but it takes forever..and I mean FOREVER believe me I did it

[teemune]

@Mike0brien Metal core in a coil gun coil? ;) You should use a drill when coiling if you want to have a lot of windings. We used thick wire and not so many windings for big current.

[Erivida]

i don't think it will fit into the blendomatic, so don't go and ask

[GenMinion]

honestly, i was expecting more

[absta209]

its cool... if you want to chase flies away

[XD87337]

dont kill that descktop bechinde , and can you tell me there i can fint the project to do that ?

[mrthebillman]

I'll keep my AR-15 for now.

[darkenlight22]

I'm not trolling actually really like your design but when you took aim did you notice your target was right in front of your PC tower? Yeah be careful because that looked like a Philips bit and rightfully so your computer might get drilled and you'd be screwed. :P I was like OHHH NO almost jumped in the screen to take one for the team.

[wolfy9005]

@redjello2o I think they use compressed air to accelerate the projectile in a railgun before the railgun does any work.

[cchanderson]

Has anyone seen my T-20 bit? No dude NO IDEA!

[DanielTseng100]

dear santa...

[unscspec123]

@redjello2o

yeah like a regular gunpowder fired bullet extra accellerated by magnetic power

[TheMegatron999]

BFG-9000

[tristan3795]

im sittin here waiting for a lightning olt or something and i was just dissapointed lol

[MaximusRogue4]

weak

[ShinoiOokami]

BANG headshot!

[Cabal2600]

This device is too overgrown,

Takes too long to charge and insignifecant impact on objects...

This design is not acceptable for military performances..

[zzkill1]

I wouldn't call this battlefield portable or effecient, but of course, the military tech is beyond what we can make.

[OsTomatesDoArnold]

"Lets end this fight now..surrender or DIE!!" *points a gun* "just..aa..wait a minute"

[GenMinion]

thats it? thing looks like it could kill a tank

[bakhotwheels]

@GenMinion it could take no a tank

[Stoned483]

At ally the people saying thins is crap and underpowered. It is for fun to to kill. U try building one

[DeepBlue10055]

railguns are more effective than these coilguns, but despite the fact most people here are disappointed that this gun isn't high powered, it is still an incredible accomplishment for a homemade devise. Awesome work guys!

[Andre83925]

My airgun is stronger then gnome....

[LGbunnies]

zombie Apocalypse, Sir get the coil gun we are out of ammo!

Okay but it has to charge for 1 whole minute

59 seconds later they are eaten by zombies

[DIECASTER]

Let me know when you come out with a "Phase Plasma Rifle in a 40 Watt Range",... I'll buy a dozen...

[Blacktronics]

nice but... just throwing stones at people is more efficient as self defence

[elmer293]

IDEA..........  FUCKING RAIL GUN FOR REALS

[TheWeirdcrap]

tumbs up if you expected that gun to fire plasma!

[falloutshelteradio]

Amazing :) this is pretty dang awesome, love it, keep up the future!

[SeedMayers]

a slingshot would do it too. :-P

[MrRCPeter]

Is it powerful enough to kill a small dog? Just curious...

[genussalticah]

imagine powering it up with starks' arc generator, and shot it like a uni beam, oh future is near. keep it up!!

[Saphero98]

military should use this gun XD only it should go thru people XD

[MeSezSo]

its the first prototype of the "big fucking gun"

[kolinmartz]

and this is why we still use gun powder firearms

[DaGleese]

@pill44444 not quite.....

id rather be shot with an airsoft gun than that thing, im pretty sure a bullet from that coil gun would embed itself in you at least

[vevovy]

@DaGleese m8, its going at 100fps thats weaker then a cheap airsoft pistol.

[marineooo5]

Make this an equivalent to the monical bullet and bolt actions?

[pootwoot]

Your loading mechanism looks very magazine friendly, have you attempt to make one?

[2Lazy2ThinkOfSomthin]

Good vid. So underwhelming but still great.

[1470701170]

cool but a saw it and expected laser beams

[TheDGMJR]

but its pretty cool

[TheDGMJR]

no wonder shit never gets done in the office

[MickehDaHuskeh]

I think coil guns have potential. We just need to find a way to charge them much quicker, and make them more powerful.

[MrStemkilla]

what do you use to discharge all the caps? im having trouble with things just welding together

[sean11111111]

i was kinda expecting the whole wall to get taken out.......

[Bozanaitor]

such a big gun... such a small result... its like me and my wife in bed

[laserindie]

Ferrofluid paintball anyone?

[DarkxRebelx]

Just seen a buch of videos of people making things like this, and it got me wondering, why the hell havn't the world's militeries made some?

[Qkumber1]

JAMES! GET THAT OUT OF THE SERVER ROOM!

[UniversalExpanse]

i like this gun very much, i appreicate the workmanship and skill required to do this plus it looks badass... its a shame it didnt put a hole. Ive always wondered why people dont have a longer barrel with a series of coils that further switch on and off in sequence to accelerate the projectile from standstill to full velocity.....maybe its not possible or practical to do so?

[teemune]

@UniversalExpanse Making a hole in a empty soda bottle is pretty hard since it's soft and light.

There are models with serial coils, but I don't think anyone's got more power with that setup. If I still had the time/interest to develop this more I would probably concentrate on how to cut the coil current when projectile has reached the middle point of the coil. After blowing up some FETs we decided to settle with the thyristor :P

[f14tomcatfreak]

@teemune What is the barrel made from?

[teemune]

@f14tomcatfreak I don't actually know. I think it's an aluminium alloy. It's non-magnetic but conductive. It's made for industrial tubing or such.

[MultiIPwnage]

@teemune I bet its like a bb gun. heck It could probobly kill me if I shot my self

pretty impressive

[Boeserwolf93]

@UniversalExpanse the us navy is experimenting with the setup you mentioned you can see in on youtube...those things really pack a punch

[jeromeT1020]

@UniversalExpanse its possible. but not practical. barrel would have to be stupid long

[vinillanut]

100 fps is shit that guns worthless

[KeithWasHere1]

whats your FPS on this? feet per second?

[teemune]

@KeithWasHere1 It was about 110 km/h for a 8 gram projectile. I think that translates to 100 fps.

[ultimatebman]

@teemune How bad would this hurt?

[teemune]

@ultimatebman I shot myself twice in the arm 1,5 years ago and still have the marks. It was a sharpened projectile though. Still more damage than with an air rifle. It didn't really hurt, instead it left the area numb for some time.

[nascar51523fan]

@teemune airsoft guns fire at speeds up to 600 fps i'm sure it will do more damage than this

[vevovy]

eh...yeah 100fps isnt really anything thats less then an extremely weak airsoft pistol. still looks cool though.

[KeithWasHere1]

@KeithWasHere1 that would certainly sting like hell lol.

[drawmaster77]

so what you can know down cola bottles with this monster? Impressive....

[assasinzEX]

(in battle)

:just wait a minute, just need this thing to load...

:...

(one minute later)

:All done!

[LaenPvP]

@assasinzEX watch after the 1 minute loading he misses ;P

[doggod106]

so much work for something that wont even bruise someone or pierce a can still cool though

[munchiemaniac]

ha youre using screwdriver heads arent you



[teemune]

@munchiemaniac In this clip yea :) We made some better ammunition later. Screwdriver heads we're a bit too small to shoot.

[snakev10v5]

how do you recon I should go about making a plasma gun? am

[brenttiefenbach]

i could make a more powerful weapon with a stick and a rubber band hahahah weakkkk shit hell i can throw a rock harder than that pea shooter

[nexusprime000]

TERMINATE ALL HUMANS

[wheresurbrain]

You wasted alot of good screws

[preg13]

thats pretty cool

[baradlin]

lol it almost looks like a railgun from quake

[ConnorXV]

Watch my video ' how to make a 400v charging circuit ' to learn how to make a miniaturised version of the photo flash circuit from scratch, it takes up far less space and can be easily podded to give a higher output current, it only takes four components and runs off of a 1.5v battery

[stairway11]

gay.



[whydidigetdeleted]

A good way of expressing the power is to find the muzzle energy in joules by measuring the muzzle velocity, 1J is about the energy of a BB gun, around 20 for an air rifle and 200+ for a pistol

[TheLadiesman21756]

looks life fallout laser pistol

[rachparov]

same as everyone, the size and the finition (looks nice and "complete") made me believe this gun was able to blown doors appart lol...nevermind.

[teemune]

@rachparov I guess shooting an empty bottle doesn't tell you much of it's power. As I said, it can also penetrate two full aluminium beer cans straight.

[rachparov]

@teemune the impact tells me if it"s powerfull or not, i've seen few videos before this one, that's why i assumed it's not powerfull as i expected.

Anyway, it's your fault for making unreal tournament weapon style that don't shoot laser beam! ;)

[kght222]

@teemune with amunition as heavy as a carbon steel bit thats pretty damn weak, pellet gun with a much lighter projectile could penatrate 3 or 4, and even more depending on the gun and the projectile (still much lighter) i think what you have is a great project and likely fun as hell to build, but power? hardly. a lovely looking peice though, and as i said likely a fun project.

[enta2k]

@teemune Ok same effect with my slingshot, looks freaky but sucks

[COOLSTUFF467]

how do you make the light go on while charging and the other one go on whan it's done?

[teemune]

@COOLSTUFF467 There's a microcontroller measuring the voltage (through a voltage division). But you could also do it with a comparator.

[sevengreenmice]

Slightly disappointing... was almost expecting some sort of hole-punching gun Arnie stole from the set of Eraser

[teemune]

@sevengreenmice I should've added a proper shooting video. Shooting an empty coke bottle doesn't tell much. It can penetrate two full beer cans straight. Makes a mess tho :P

[tdawg465]

what material do you use for the barrell

[teemune]

@tdawg465 It was some kind of industrial fluid piping aluminium alloy. Harder than aluminium but non-magnetic. It's conductive though, so eddy currents do occur.

[teemune]

@tdawg465 I don't know the exact material, but it's some kind of a aluminium alloy used in industrial piping. It's conductive, but non-magnetic. Probably not the best material, but that's what I happened to have in storage.

[2012thegame]

cool

[ItBeRandom]

By the size of it I expected Jesus to pop out and flip everyone off

[TheLogicisking]

how many jouls of energy does this thing shoot at?

[teemune]

@TheLogicisking I think the caps had about 750 J stored in them. The bullet was a 8mm diam x 3cm iron cone, and the bullets speed was about 110 km / h, so whatever that makes in kinetic energy.

[teemune]

@TheLogicisking About 5

[TheLogicisking]

how many jouls of energy does this thing shoot at?

[Catvore]

Please upload the schematics of this coil gun on Instructibles. com

[XQbit]

Looks pretty awesome. The charge time is a bummer though. I love the design!

[scottbrodiebam]

Sweet :)

[superpoop899]

laser is pretty accurate

[ohwow443]

u should make a clip it would be easy for this gun

[teemune]

@ohwow443 We were supposed to do so, but we wanted to get the gun finished asap (as you can see ;D), so we settled with this design.

[Neverrth]

Do I see russian dc connector at 0:18?

[teemune]

@Neverrth Military standard connector. Might be used in Russia too.

[dingo27mobile]

One hour ten minutes between shots? Cmon, you can make better...

[teemune]

@dingo27mobile One minute and ten seconds actually. You're probably joking, but maybe I should clarify that in the description anyway.

[dingo27mobile]

@teemune no you had 1:01 or so time, i never thought it can be also minutes :)

[teemune]

@dingo27mobile I think it can. :P

[AnselmoFanZero]

@dingo27mobile

Could you?

[hifatpeople]

have multiple cap banks that get charged as soon as their fired, have a selector switch so you can choose to empty all banks at once for a strong shot or empty them seperate so you can fire and have others charging at the same time, put the power supply/ caps in a backpack and have a chord running to the gun you hold, the gun can be smaller since you have the power stuff in a backpack like a flamethrower, add a magazine and have a motor reload it after each shot, then maybe you can have a sh

[teemune]

@hifatpeople Good suggestions. If I had the time I would improve it. Most of all I would want to build a faster charger-circuit. It's very basic now. I burned all the electronics after testing a more powerful coil. Now it's almost repaired. Just need to reprogram the microcontroller. Magazine could be added even without a motor. Although you would still need to pull the rod on top of it back and forth.

[happygamestvfun1]

wow that peice of 10 pound pecie of junk would have less then my little hand made sling shot made from twigs and me elestic from me underware

[SpecklePattern]

@happygamestvfun1 Yes. Some play with their skills to build... but you should stick with your sticks ;D

[Britishdude1]

I've seen people charge their guns in a few seconds - like 2-3 seconds. My 223 joule coil gun takes 45 seconds to full charge. I don't know how many joules your gun is, but do you have any idea how to get the charging time down?

[teemune]

@Britishdude1 It's about 750 joules if I remember correctly. Charging time depends on what energy supply you use. I have a 12V battery, so I need a buck-boost circuit to raise the voltage. So that circuit becomes the bottle neck for my design.

[szuszi2]

@teemune whats a semiconductor? and how do i connect the thyristor? oh and im using a toggle switch (on/on)

[teemune]

@szuszi2 Try to google thyristor and see some examples or try "coilgun schematic" etc. That should get you started. It's a bit too complex to explain in brief.

[szuszi2]

NICE! how do did u solw the switch for fireing? myn always burns and its 18 amps what should i do

thanks!

[teemune]

@szuszi2 18 amperes is not very much. I'm using a huge thyristor. I never found a proper datasheet for it, but it has held so I haven't changed it. Are you using a mechanical switch? I recommend a thyristor. But watch your eyes when using semiconductors for switching the current on, cause they tend to explode.

[Britishdude1]

@szuszi2 I managed to find one cheap which is intended for power main usage. It can handle 1200v at 1400 amps. You can however, use several 18amp thyristors in parallel to get the desired amp/volt ratings. Just be sure to put some 100 ohm resistors on the i/o lead to make sure they all trigger at the same time.

[AnselmoFanZero]

Thats what I call bulky...

[teemune]

Only about 720 for now.

[aewallin]

how many Joules is this?