Instructables
Picture of The $0 Coil Gun

We've all been there, you see something cool online, you want to figure out how is done but no one seems to want to help you. So you look up videos on Youtube and all that you find are even better and even military grade coil guns. http://blip.tv/file/3059790 But nothing that's really going to help you with your project or your simple coil gun. So finally if you're like me, you come to Instructables.com where you pretty much find everything you want in a simple search. This is my attempt at teaching you a basic simple to do, Coil Gun Hope ya'll like it. Bellow is a video of the whole process, if you don't feel like watching the video and want to get started on the Instructable instead, go to the next slide Either Way Have Fun :)


 
Remove these adsRemove these ads by Signing Up

Step 1: Supplies

Picture of Supplies
5.jpg
4.jpg
3.jpg
You really don't need much for this project, and it really cost about $5.00

You will need to find a disposable camera, any type of camera works. Usually if you go Walgreens and ask for a recycled camera that you will be using for a project they give you some for free. In the video you see us go through 50 cameras that we get for free from Walgreens. The more capacitors that you have, the stronger your coil gun will work so keep that in mind.

Next you need to find a plastic tubing, anything that is not conductive. A pen tube works best for this type of project. But youre looking for anything that is non-conductive.

Also you need to buy magnetic enamel coated copper wire. This will conduct the electricity to the tube.

And lastly you will need a Button Switch

and a Battery :) And that's about it :)
1-40 of 128Next »
hmbmideas2 months ago
Too complicated
LiftAndLove2 years ago
what are the full risks of making this. if im accidentaly electrocuted, wut are the outcomes( will i end up in a hospital). and finally wut voltage should i use.
Voltage does not kill you amperage does. If you put multiple capacitors in parallel, you can get more amperage, but you will be ok unless you you are touching both leads at once.

The amps are controlled by the voltage

jbyrns19939 months ago
Well i have but one question. Can I use a giant electrolytic can capacitor? I have one 100,000 uF at 600VDC
theexpert3 years ago
i made this and is worked but later i tryed to make it into a box and use a 9 volt battery and for some reason it wont work is it the 9 volt battery? the circut has worked before
Nilpmet theexpert10 months ago
because the transformer is only rated for 3 volts!
HM-Innovations (author)  theexpert3 years ago
the 9v current is probably to high for the circuits and you probably blew the capacitor on the small camera charger.
ok thank you that really helps ill post a picture of it once i get it working
kingpudge1 year ago
Do u have to use duck tape
Nilpmet kingpudge10 months ago
Really?
ok so i followed this ible to the wire (well expect the wire its 24gauge does that change anything? lol) i have my circuit board all rigged up to a coil around a pen tube with duct tape which goes to a switch and the switch goes back to the capacitator (sorry if its confusing). I know the circuit board is fine because i have shocked myself multiple times, but the electricity wont flow through the wires :(

Help PLEASE!!
Make sure each wire is soldered onto the respective side of the capacitor bank, and they are not touching. Also make sure capacitors are in parallel (+ to + and - to -).
i know it has been a long time but make sure the actual button on the circuit has been pressed
suhaana1 year ago
i actually wanted to make a coil gun as my physics project.. can i use capacitors from an old computer??
Nilpmet suhaana10 months ago
It depends on the voltage of the capacitors, but it is best to just get disposable cameras. You can go to Walgreens at the photo department, and asked for used ones, and they will say "sure how many!"
LiftAndLove2 years ago
also, do you charge the gun?
tallen143 years ago
Is it possible to use a light switch instead of a button?
HM-Innovations (author)  tallen143 years ago
yes sir :)
tynow3 years ago
do u need all the circutry from the camera, or just the capacitor? i have a computer i took apart and there is all sorts of capacitors on that, what voltage do you need for this? what batteries? im full of questions
theexpert tynow3 years ago
none matter all you need is transformers and then captitors on the other end so if you wired it battery switch transformer capatitor switch coil it would work
tynow theexpert3 years ago
what would the transformer look like?
theexpert tynow3 years ago
the transformer is the little brick looking thing next to the led that lights up once the flash is charged that is manly what makes a double a battery charge a 330v captitor
bhuty3 years ago
does the led on the circuit come on when its ready to fire?
theexpert bhuty3 years ago
yes
bhuty theexpert3 years ago
is it possible to take the LED off and reattach with wires so the circuit board and the LED were in two locations, for example on the rifle the circuit board was in the stock and the LED was at the front?
theexpert bhuty3 years ago
yes it is
imillspaugh3 years ago
Okay, so I got mine all built, and I was wondering, when you only use one camera, How far is it supposed to shoot? Because mine Just has an occasional spark, and moves a centimeter at a time.....
that will happen if you use one camera you should probly use about five i did and it shot it about 5 feet at a height of 2 1/2 feet high
kschmidt23 years ago
nice tut, very informative, a wiring diagram would also be useful.
simpo0674 years ago
Safety tip chaps!!
After initially discharging the capacitor short the connections together to prevent the charge building up again, keep it this way until you are ready to connect it into your new circuit. Whilst this charge won't be as big as normal it can still come as a shock (pun intended) dependant on the Faradic value of the capacitor.
tynow simpo0673 years ago
(pun intended) lol
shadow47424 years ago
why do you remove the battery before you shoot?
The charger circuit works in a way that if you dont remove the battery, the capacitors will begin charging immediately after you discharge them.
not if you make a circuit like i did very good and has a fail safe if you want to make one
have u got a schematic i keep blowing my camera curcits so if i look at yours i might be able to work out what im doing wrong if u have a schematic send to
Hughthob@hotmail.com
i don't have a schematic and sorry it took so long but i just put in a switch to shoot witch is after the caps and one in between the battery's and board to control charge and i also have a fail safe if stuff starts sparking to witch is two more sitches one going to caps witch allows you to charge and another to random wires to discharge extra energ in the caps
if your switch welds it will continuously charge and fire making a very bad scenario since you may get shocked removeing it after
Emsaid3 years ago
would it matter if the capacitors were different voltage?
glouphrie3 years ago
do you use the camera charging circuit to charge the capacitors? if so how long does it take? and if not, how are you charging them?
1-40 of 128Next »