Introduction: Pocket Sized Coil Gun

This is a super tiny pocket sized coil gun! Although this is not the most powerful coil gun, its size and looks make up for it!

Step 1: Gathering Materials and Tools

Materials:

-Disposable camera
-Empty pack of gum
-1/8 Tube ( old pen tubes work great!)
-1/8 Nail
-Acrylic
-On/Off Switch
-Normally Open Button switch
-Extra wire
-Super glue
-Solder
-Flux

Tools used:
-Soldering gun
-Knife
-Bench grinder
-Hack saw
-Dremel
-Ruler
-Marker

Step 2: Making the Frame

I put  a frame into the gum pack to give it some extra strength and make it easier to pack everything in the small space. Basically, I measured the gum packs dimensions and cut out some sheet acrylic to the correct measurements and super glued it all together. Once your frame is complete, move on to the coil.

Step 3: The Coil

     To make the coil you will need a small tube, an ink tube from a pen works well. Simply clean the tube with a q-tip and and start wrapping your coils.
     Once you have your tube ready, tie a half knot with the wire onto the tube and super glue it in place. The position of the knot should be about 1 inch from the end of the tube. Now start wrapping the wire around and around the tube toward the other end. Try to get a nice tight fitting coil, and keep wrapping until it is about 3/4 in. long, then apply a coating of super glue to the coil. Now you have completed the first layer! I found that 7 layers works pretty good for this compact coil gun. To make another layer, simply start winding the wire back to the knot where you first began. Keep winding until you have about 7 layers, remember to glue each layer as well. This takes some time so don't try to hurry it because the coil is one of the most important parts of the gun.

*Important Note* Do not change the direction you wind the coil, exp. if you start winding clock-wise do not switch to counter-clock-wise.

Step 4: Making the Curcuit

     Once the frame is made, you can begin making the circuit. This will allow you to build the circuit into the frame so it is easier to fit everything together. I de-soldered the capacitor and the + and - leads, then shaved the circuit board down as much as possible so I could make room for everything else. Now lay down everything into your frame and find a way to make it all fit (see my picture above of how I did it) then start wiring it together.
     Your circuit might have a push button switch on the circuit board to charge it, I just soldered the switch closed and put a switch onto the positive lead to the battery. this switch is now the charging switch.
     Now solder the capacitors or capacitor in parallel back onto the circuit.
    Once your coil is made solder one of the leads to the negative lead of the capacitor bank and the other to the positive, but wire in a push button switch. this will be the firing switch.
     Now re-pack everything into the frame and glue the switches on the edge of the frame so that you can operate them from the outside.
    

Step 5: Fitting It Together

Once your circuit is finished and glued into the frame, slide it into the gum pack and cut holes for the two switches, the barrel, and the charging light. I sharpied the holes black so they would be less noticeable.

Step 6: Ammo

Now grind down your nail to the appropriate length (diagram above shows the correct proportions of the ammunition) and either round off the tip or give it a nice point. My nail was still a bit to big in diameter so I used my dremel and sanded it down a little. You will want your "bullet" to slide down the barrel easily.

Step 7: Fire!

Now you should be ready to fire! Simply switch the charging switch on, and once the red light flashes, turn the charging switch off. Then insert your projectile down the barrel and push the button switch. Have fun!

Enjoy!

Please ask if you have questions

Comments

author
Plasmamaster made it! (author)2016-06-20

So I attempted to build this project and I was wondering did you modify the circuit board too? or should the simple circuit that you drew should work? because when I attempted to test the circuit it didn't work. I also saw how you put everything in the plastic case and the components on the circuit board looked different.

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jamesinator made it! (author)2016-05-30

This is Awesome! The diagrams where super helpful. So you did the pixel art yourself? Great project!

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ffrench made it! (author)2014-12-04

Sir, you are a genius. What brand of camera did you use?

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notnowmyheadhurts made it! (author)2014-06-05

What kind of disposable camera did you use? The brand name would really help.

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tjesse1 made it! (author)2014-03-02

So is it one big coil,or seperate layers!

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Nightmare77 made it! (author)2013-08-11

Is the bench grinder really nesscesary or can I use a file

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danbaha made it! (author)2013-05-27

Can I solder the coil leads to where the flash was?

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danbaha made it! (author)2013-05-24

Hello! I was wondering if I need to use the red magnet wire for the coil or if I could just use 24 gauge copper wire?

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Skwurlito made it! (author)2013-02-17

I have a question can you hook your brain up to my computer without frying either of the two, so i may copy some of your BRILLIANCE to my hard disk?

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FrozenIce made it! (author)2012-12-08

Is this achievable if i only use parts from the disposable camera?
Do you think i can do this without soldering?

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Emsaid made it! (author)Emsaid2012-12-08

you may be able to, size will be a problem though. but its worth a shot! if you cant fit it into a gum thing maybe try an Altoids tin

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Adambowker98 made it! (author)2012-10-16

Will definitely be making this soon. What size acrylic did you use?

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Penolopy Bulnick made it! (author)2012-07-31

Cool! It's nice as a spy weapon too!

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Emsaid made it! (author)Emsaid2012-09-14

Thankyou! works great!