Spy Pen Coil Gun

this instuctible will show you how to make 2 different kinds of small compact coil guns

the 1st design you have to take apart and connect it to a charging circuit to recharge the capacitor (for smaller pens)

The 2nd design you only have to connect it to a charge circuit to recharge the capacitor (for larger pens)

Step 1: Coil Gun Design 1

materials

- a coil from a old outlet timer (the kind that you have to use little plastic things to set the times) i recommend using this kind of coil because its small and professionally wound

- a capacitor from a disposable camera (try to find one thats long and thin enough to fit inside your pen in my case i had to peel the plastic off the capacitor to make it fit)

- a pen (the kind that look fancy but are all plastic)

- a capacitor charging circuit (not show in this instructible but heres a link to one https://www.instructables.com/id/Capacitor-Charger/... )

- a soldering iron with solder (and some experience using one)

- heat shrink (i didn't have any so i used tape but heat shrink would be better)

- hot glue gun (not 100% necessary you could use tap)

Step 1

Take apart your pen and get rid of all the ink spring (if its a click pen)

Step 2

Hot glue your coil to the inside tip of you pen

Step 3

Hot glue the capacitor to the pen button if its a click pen if its not make a hole in the top of then pen and cut the ink just long enough to push the capacitor

Step 4

Put the pen case back together (in my case it screws together)

Step 5

it should fit nicely together, and when you push the button or bit of ink tube on the top of the pen it should make contact with the leads of the coil

Step 6

To charge the capacitor just take apart your pen case (in my case it unscrews) and attach the capacitor to your charging circuit when its done charging (about 10 seconds) put it back in your pen case and screw it back together

Step 7 to fire it all you have to do if cut a piece of paper clip about 1/4" and put it in the coil tube then press the button or ink tube on top

Step 2: Pen Coil Gun Design 2

materials

- a coil from a old outlet timer (the kind that you have to use little plastic things to set the times) i recommend using this kind of coil because its small and professionally wound

- a capacitor from a disposable camera (try to find one thats long and thin enough to fit inside your pen in my case i had to peel the plastic off the capacitor to make it fit)

- a pen (the kind that look fancy but are all plastic) - a capacitor charging circuit (not show in this instructible but heres a link to one https://www.instructables.com/id/Capacitor-Charger... )

- a soldering iron with solder (and some experience using one)

- heat shrink (i didn't have any so i used tape but heat shrink would be better)

- hot glue gun (not 100% necessary you could use tap)

Step 1

Take apart your pen and get rid of all the ink and spring (if its a click pen)

Step 2

Hot glue your coil to the inside tip of you pen

Step 3

Attach 2 wires to each of the capacitors leads

Step 4

Attach 1 of the wires from the capacitor to the coil

Step 5

Attach the other wire on the other polarity to the button

Step 6

attach a wire to the other lead of the coil

Step 7

Attach the wire from the coil to the button

Step 8

Put the button threw the hole on the top of the pen if its a click pen if its not make a hole on the top then put the button threw it

Step 9

Hot glue the button in place

Step 10

Hot glue the capacitor in the top of the pen (if it doesn't fit use magnet wire for the button or try peeling the plastic off the capacitor)

Step 11

Make a hole in the pen

Step 12

put the 2 Extra wires attached to the capacitor threw the hold

Step 13

Put the pen back together

Step 14

To charge the capacitor attach the 2 wires sticking out the hold to your charging circuit wait 10 seconds

Step 15

Disconnect the wires from the charging circuit

Step 16

Cut a pice Of paper clip about 1/4" long

Step 17

Put it in the coil tube and press the button

Step 3: Side Notes

this is my 1st instructible so i would really like if you take a minute to leave a comment about what i could have done differently

I am sorry if there wasn't enough pictures i could only take 2 because i had to use my phone camera and they don't look that good

I got my pen coil gun to shoot about 20' if you make one please tell me how far it went, i would like to know

This coil gun isn't meant to be used a lot its just something cool to show your friends or to be sneaky with your paper clip shooting

Comments

[Danger is my middle name]

Cool! I would feel like James Bond with one of this things!

[PRO DR MR BOB]

ya i had to look everywhere to find a nice metal pen that looked spy like lol

[Grover Bundy]

It seems very cool i will try it.

[BrendenK2]

very nicely done. this is the most compact coilgun that i have seen. most of them are about a foot long and shoot about ten inches.

[megabyte265]

What is the capacitance of the capacitor?

[PRO DR MR BOB]

i do not know but it was found in a disposable camera

[lego_jedi]

Do you know what type of pen that is? (the name of it etc.) That would be a great help because it looks like a neuralizer (from Men in Black) and I would quite like to make one.

[PRO DR MR BOB]

i dont know what type of pen it is but it was from one of my parents companys

[lego_jedi]

Ok thanks I might have something else lying around :-)

[comic geek]

That's really cool! Could you make a video of it firing and/or a video of how to make it? It's a very well done 'ible