Instructables

Transformer help.

Ok, i am trying to build a charger for my coilgun science project and was wondering if there was a way to hook up a transformer WITHOUT winding any freaking coils. Most help works, thanks.

iceng3 years ago
Sorry confused you with some one else.  To answer your question you don't have to wind a fre---ng XFMR all what you need is the guts of a throw away 
flash camera guts. That circuit can charge the capacitor for your coilgun.

I have always warned young experimenters, when you are running your
project, literally keep one hand in your pocket until the battery is removed
and all the high voltage capacitors are short discharged ( I use a ruined
metal blade from s plastic screwdriver for discharging in a hurry )
That way you don't risk your life only the fingers on one hand.
iceng3 years ago
(removed by author or community request)
budhaztm (author)  iceng3 years ago
and i do give credit when i find a good answer
;)
What voltage are you looking for?
budhaztm (author)  The MadScientist3 years ago
im looking for around 600 volts. maybe close to 1000. And for everyone else, i have taken safety precautions and im only calling it a "coil gun" when asking about it on this site. thanks. And my teacher let me do it last year and its a physics project.
rickharris3 years ago
You must go to a very open minded school.

High voltages are banned here in the UK education world.

Judging from your other questions your taking a high risk, and I mean HIGH and RISK approach to learning electronics.

For your own sake start with low voltages and learn some basics there are lots of web sites and books out there to guide you to build things that won't kill/maim/severely surprise you AND will teach you some essential electronic knowledge.

Once your at the comfortable stage with that you can then move onto making lightening and playing with high voltages and currents with a bit more safety and understanding.

As your manner of asking the question suggests that you have some way to go in research and experience/understanding before your ready to do this - Sorry not from me - it would be too risky.
"High voltages are banned here in the UK education world."

No, they're not.

As long as appropriate risk assessments are performed and followed, you're fine. Risk assessment & general safety are part of the practical side of the UK science curriculum (the "Sc1" strand).

The truth is that many potentially hazardous activities are avoided by staff who either cannot trust their pupils to follow safe practice, or are afraid for their careers, should a child be injured at all.

To me, science experiments are like dogs you do not know - you are safe, as long as you act correctly. Fail to act correctly, you'll get bitten. A couple of nips as school children help them learn to be more careful in future.

AFAIK at least AQA product design and electronics boards request that students below A level don't work with mains voltage although a PSU powered by mains would be acceptable.

Or they did in 2008/9 - taken from moderator seminar after a direct question was asked.

"Requests" that it not be used, not "ban it from use".

AQA are just an examination board, they're not in charge, and subject to the same fear litigation as other people who are afraid to accept responsibility for their own actions.

(They're afraid that, if a child gets hurt, a teacher or school will pass the buck, saying that "they said it was OK", when the responsibility does actually lie with the teacher.)

"A couple of nips" - until someone complains!..

Yeh I know, I also did things that many others considered too risky, full sized electric racing cars for a start,

But even my Head would have gone pale if he had been told a student was building a coilgun.
It's those three little letters - g.u.n.

A water rocket could do an awful lot more damage to body and property than any coil-gun.

Call it an electromagnetic projector, or weather the panic long enough to explain that safety has been taken into account, and you're fine.

If the head goes pale at the title of a project, they either don't understand the science, or they don't trust the teacher's judgement.

With my classes, I've made a cannon that could shoot glue-sticks, detonated large volumes of methane (and slightly smaller volumes of hydrogen), launched rockets (both water and solid fuel), and shocked entire classes simultaneously with a VdG.

+1

Steve