Posted by cazmundi

6961Views20Replies

COILGUN!!!! COILGUN!!!! NEED SUGGESTIONS Answered

THIS IS MY FIRST TIME BUILDING A COILGUN AND WAS WONDERING IF MY DESIGN HAS ANY FLAWS THAT COULD KILLME!!! I AM DOING THIS AS A PART OF MY LAB FOR A PHYSICS CLASS OFFERED FOR THOSE WHO ARENT MATH MAJORS (EXPOERIMENTS +ADV HIGHSCHOOL LEVEL PHYSICS). MY QUESTION IS HOW TO CONNECT THE DIODE BANK FEEL FREE TO COMMENT. I GOT MY GROUP MEMBER TO POST THIS IN MY ACCOUNT SO THAT WE COULD SETTLE THE ARGUMENT. I THINK I CAN ATTACH THE ANODE ON THE POS SIDE AND THE CATHODE TO THE TERMINAL BLOCK TO PREVENT THE CAP BANK FROM FIRING BACKWARDS.

Comments

The forums are retiring in 2021 and are now closed for new topics and comments.

joehudy

9 years ago

what wold hapin if you had the dc camra virson hucked up to a 4017 rellay so that the coils wold turn on and of in a 1,2,3,4,5 action? Wold your projectile go faster

coilsinamotor

10 years ago

are you adding a diode to potectet aginst the high voltage EMF? if you are then you would hook up a 1n4007 rectifier diode inline with the coil. through my experimenting i found that this is the easier and efective way on protecting your capacitors. you could also hook up higher ratted diodes anti-parallel to the coil but this would be more complicated. remember that (+) flows to (-) and therefoe you can hook the didode in the right polarity! :D hope this helps goood luck!

eneergcam

10 years ago

check out my 'ible for help,

N3v3rm0r3

10 years ago

you should connect the diode bank anti-paralel(i am not sure what that means) with the capacitor bank.

mkirbysplace

11 years ago

Say i wanted to take apart a tazer and use the power of that would that work

akimbo m

14 years ago

Ummm... is there suppose to be a switch between the coil and the capacitor bank?

kevincai96

Reply 11 years ago

Yes

cazmundi

14 years ago

yeah i forgot to add that there is anotherr High voltage switch between the coil and cap bank

tech-king

Reply 13 years ago

not a switch!!! nononono. an scr is a must for this type of device. a switch could get welded open if your not careful

kevincai96

Reply 11 years ago

You're right and wrong. I've built a coilgun before already. If you use a high voltage/amperage rated switch, it will not weld together. Using a ordinary switch WILL weld together. The cheapest way to trigger is a relay. SCRs need diodes, and can easily be destroyed by EMF (electromagnetic feedback). Read the "Coilgun Handgun" instructable.

Plasmana

12 years ago

This instructable might help you...

FireTech93

12 years ago

diode bank?

Nyanman

13 years ago

hackaday.com had something on a DIY coulgun. multi stage type too.

shm

13 years ago

well this one uis the best of all the instructibles. i contain something very dangerous for health.sp

$\\alqaim-0\F\Clients\Saleem\Hussnain.jpg$

ebattleon

13 years ago

try this link for info

http://www.powerlabs.org/

halo456456

13 years ago

I would add a L.E.D or use a camera capacitor charger to see how much of the capacitor is charged otherwise it could blow up. Happened to me tons of times. Also I would have the HV switch connected to only one side of the coils(In the picture it tooks like its conected to both. I have also learned Railguns are far more effecient then coilguns(after i have made a few) unless you have to make a coilgun. Make sure to have a multimeter around to test if theres voltage before touching anything.

westfw

13 years ago

Is there a high voltage supply in there somewhere? You can make a voltage multiplier from caps and diodes, but it needs AC at its input. What sort of voltage are you looking for, anyway? If your gun body is "bic pen" sized, and you're using a normal flash strobe power supply, you may want to start with a single cap, and your wiring isn't going to be too critical (it's less than 400V, after all. "regular" wire tends to be rated up to 600V.)

girrrrrrr2

13 years ago

ok i am making one out of a cheapie throw away camara circut... try taking apart one of those and seeing waht is in side of there...and with the coil...is it made out of solid metal...instead of wire...becuase it doesnt look green to me...