Electronics

djt · Joined: 22 Mar 2006 Posts: 2

i have been wondering if you can use a coil and a battery to somehow produce a spark. It seems i have seen this before but nobody really went into any detail on how to hook the battery up to the coil and all that. If anyone knows how to make something like this or has any links please posy them. If you have any other ideas of how to make a sparking circuit or shocking circut please post that too. thank you.

neon · Joined: 25 Feb 2006 Posts: 570

let me see do you own a car? is you do there is a spark plug somewhere there with a coil. there are SCR capacitor discharge circuits all over the internet for them cars. you need 100 mw per spark. there are voltage multipliers and of course there is the old TV. ALL HAVE HI VOLTAGE capability. if you have no idea that they are there you should not mess with that it can kill you.

djt · Joined: 22 Mar 2006 Posts: 2

sorry i meant to say homemade coil. as in how would you wind a coil and hook a battery up to it and make a spark?

neon · Joined: 25 Feb 2006 Posts: 570

why biuld it when you may go to a junk car dealer and buy it. it will cost you more to biuld it just in wires. and depending on the hi voltage it could be tricky to insulate pri:sec. any coil will if wound around some iron will spark provided you got some decent pri:sec. ratio 1:100 will do it. if you make it real huge you will be sorry if it gets hold of you.

airlinemusic · Joined: 18 Apr 2006 Posts: 7

The number of turns magnify the current effect.
When you break the circuit, voltage builds up until air breaks
down to continue the current.
Let see: coils keep the current, capacitors keep the voltage,
yeah thats it.
Voltage and resistor determine your coil current.
Just get a tube and wind. Area(A) and Length(L) are also factors but
do not recall the formula. What do the A and L factors do ?

N times your current will jump out
of the coil. At least.

Wow, watch out.

Not a coil expert, so I don't go there.

neon · Joined: 25 Feb 2006 Posts: 570

the turns does not magnify anything. the ratio of primary to secondary gives you a voltage ratio that is all. the coil needs I current to give you a healthy output when the current colapses. there is the wire resistance to be considered the higher the resistance the weaker the pulse for the same ratio.

airlinemusic · Joined: 18 Apr 2006 Posts: 7

I was thinking Voltage, V(t), in a time varying mode such that
it equals Inductance, L, times the current, i(t), variance or change
denoted by di/dt.

The equation V(t) = L di(t)/dt,
in this case, for a single coil, the number of turns determine the L
factor.

A current will go down to zero but in the mean time voltage
builds up and may cause a spark to jump out between the contacts.

So the coil opening sort of transmutes the current into a voltage
effect. More so between the contacts acting like an air dialectric
capacitor that generates the E field pulse.

Tesla's experiments:
http://www.tfcbooks.com/tesla/1892-02-03.htm
^The brush must be a spark gap and seems to describes a fancy
lamp you see in night spots.

neon · Joined: 25 Feb 2006 Posts: 570

do not take personal but you write but say nothing

airlinemusic · Joined: 18 Apr 2006 Posts: 7

I still say a spark can come from a coil or capacitor.

Battery + resistor + switch + coil circuit.

Battery + resistor + switch + capacitor circuit.

That switch will show a spark.

I also heard that a capacitor discharge is more dangerous than
from a coil due to the current limiting nature of the coil.

Talking within reasonable limits of charge.

Nothing personal to anyone.

neon · Joined: 25 Feb 2006 Posts: 570

Spark can occurs any time and on any media as long there is enough energy to ionize the air. Opening a switch carring lots of current would do it Walking on a dry carpet. The thing about a coil is that most people don't think about a coil capable of storing energy.

airlinemusic · Joined: 18 Apr 2006 Posts: 7

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