Electric Fence Energiser

O

oxy

Guest
Hi,

I am looking for information on Electric Fence Energisers. Design
information
would be great. Has there ever been any books produced on the subject?

Any pointers appreciated.
I need a high power (10 joules per pulse, lots of voltage) device in
order to control (half murder!!) sheep. I have access to neon sign
transformers, all I need is a circuit to feed in a pulse of the
required type into the primary. Sounds simple, but I don't know how to
do it. It is EXTREAMLY difficult to come accross information regarding
energiser circuits. A DC pulse is usually fed into the primary from a
charged capacitor.
Would it be OK to simple feed in one (or two) cycle(s) of the mains
once per second using some sort of cycle counter and gate to the neon
sign transformer?

Feel free to brainstorm!

Cheers,

TIA
 
"oxy" <posterr2000@yahoo.com> wrote in message
news:a7a8e9d6.0405031532.348a5dc0@posting.google.com...
Hi,

I am looking for information on Electric Fence Energisers. Design
information
would be great. Has there ever been any books produced on the subject?

Any pointers appreciated.
I need a high power (10 joules per pulse, lots of voltage) device in
order to control (half murder!!) sheep. I have access to neon sign
transformers, all I need is a circuit to feed in a pulse of the
required type into the primary. Sounds simple, but I don't know how to
do it. It is EXTREAMLY difficult to come accross information regarding
energiser circuits. A DC pulse is usually fed into the primary from a
charged capacitor.
Would it be OK to simple feed in one (or two) cycle(s) of the mains
once per second using some sort of cycle counter and gate to the neon
sign transformer?

Feel free to brainstorm!

Cheers,

TIA
Click to expand...
Hell no! *DON'T* go driving a fence energizer from mains, you'll kill
someone! Which may sound like fun, but when Bubba has his way with you at
your local prison you'll probably change your mind. There are plenty of
pre-built, tested and approved products out there which will do the job, and
you are way less likely to be prosecuted if someone plasters themselves on
it.

If you want to find stuff on electric fences, you could actually use google
or altavista.

Ken
 
oxy drowning:
Hi,

I am looking for information on Electric Fence Energisers. Design
information
would be great. Has there ever been any books produced on the subject?
Click to expand...

DO NOT DO IT THIS WAY.

This would make an excellent "death trap" for some human that accidentally
touches the fence. As I understand them, electric fences use a high-voltage, but
VERY VERY LOW current (milliamps) and are current-limited.

A while ago (in February IIRC), in my city there were 2 people killed by
electric fences after they accidentally touched the fence.

The fence was ran directly from 110V mains (IIRC, could have been 220V, because
we have both here in Brazil), there was no current-limiting, and worse: no
warning that there was an electric fence nearby.

[]s

--
Chaos MasterŽ - Posting from Brazil - MSN: Wizard_of_Yendor@hotmail.com
BRASNET: Wizard_of_Yendor at #POA, #Canoas, #XLinuxNews
Powered by Mozilla + Gravity + XChat (on Windows)/ Mozilla + Sylpheed + BitchX
(Linux)
 
"oxy" <posterr2000@yahoo.com> wrote in message
news:a7a8e9d6.0405031532.348a5dc0@posting.google.com...

Feel free to brainstorm!
Click to expand...
Landmines will work much better; Since you do not worry about killing
sheep - and humans for that matter - I take it that by "control" you mean
"reduce the number of pestilent intruders on my property" - maybe you can
buy some of the surplus wire activated ones from the Berlin wall? North
Korea may be in the market too.

Seriously, any farm shop will sell Legal, Safe and Approved equipment that
does the job at less than you can possibly build it for!
 
On Tue, 4 May 2004 01:52:17 -0300, Chaos Master <blown.fuse@ig.com.br>
wrote:

A while ago (in February IIRC), in my city there were 2 people killed by
electric fences after they accidentally touched the fence.

The fence was ran directly from 110V mains
Click to expand...
Quite a lot of low power toobz are happy to run at 110V plate voltage
(DC of course). The great thing about that happy voltage range of say
80-150V is that you can check for the present of the voltage just by
sticking your fingers between anode and deck. I know I'll get a lot of
abuse for suggesting this, but it works for me!

Disclaimer: Er, but don't try it at home; YMMV; fatalities can occur
at much lower voltages... :)
--

The BBC: licenced at public expense to spread lies.
 
On Tue, 4 May 2004 11:03:51 +0200, Frithiof Andreas Jensen wrote:

"oxy" <posterr2000@yahoo.com> wrote in message
news:a7a8e9d6.0405031532.348a5dc0@posting.google.com...

Feel free to brainstorm!

Landmines will work much better; Since you do not worry about killing
sheep - and humans for that matter - I take it that by "control" you mean
"reduce the number of pestilent intruders on my property" - maybe you can
buy some of the surplus wire activated ones from the Berlin wall? North
Korea may be in the market too.

Seriously, any farm shop will sell Legal, Safe and Approved equipment that
does the job at less than you can possibly build it for!
Click to expand...
Not to mention one that is solar powered/recharged.
--
Best Regards,
Mike
 
"Paul Burridge" <pb@notthisbit.osiris1.co.uk> wrote in message
news:685f90t246lhf8sflv53bvbm7pp25n4ueg@4ax.com...
On Tue, 4 May 2004 01:52:17 -0300, Chaos Master <blown.fuse@ig.com.br
wrote:

A while ago (in February IIRC), in my city there were 2 people killed by
electric fences after they accidentally touched the fence.

The fence was ran directly from 110V mains

Quite a lot of low power toobz are happy to run at 110V plate voltage
(DC of course). The great thing about that happy voltage range of say
80-150V is that you can check for the present of the voltage just by
sticking your fingers between anode and deck. I know I'll get a lot of
abuse for suggesting this, but it works for me!
Click to expand...
In my college days, I spent a couple of summers working with electricians.
One old guy would test for power with the back of his hand. He could tell
the difference between 110V and 220V. He got onto a 440V circuit once and
complained for a week.
 
I am looking for information on Electric Fence Energisers. Design
information
would be great. Has there ever been any books produced on the subject?

Any pointers appreciated.
I need a high power (10 joules per pulse, lots of voltage) device in
order to control (half murder!!) sheep. I have access to neon sign
transformers, all I need is a circuit to feed in a pulse of the
required type into the primary. Sounds simple, but I don't know how to
do it. It is EXTREAMLY difficult to come accross information regarding
energiser circuits. A DC pulse is usually fed into the primary from a
charged capacitor.
Would it be OK to simple feed in one (or two) cycle(s) of the mains
once per second using some sort of cycle counter and gate to the neon
sign transformer?

Feel free to brainstorm!

Cheers,

TIA

Hell no! *DON'T* go driving a fence energizer from mains, you'll kill
someone! Which may sound like fun, but when Bubba has his way with you at
your local prison you'll probably change your mind. There are plenty of
pre-built, tested and approved products out there which will do the job, and
you are way less likely to be prosecuted if someone plasters themselves on
it.

If you want to find stuff on electric fences, you could actually use google
or altavista.

Ken
Click to expand...
I don't want to run the -fence- from the mains, I want to build a
fence energiser that is powered by the mains, safely.
I perhaps should have asked the question this way:

Are there any folks here who could inform/enliten me of
circuits/theory regarding feeding DC pulses into high voltage output
transformers.
You can pretent the circuit will be powered by a battery if you like.
I can simply add a 'battery eliminator' circuit later.

Cheers
 
On 5 May 2004 16:05:42 -0700, oxy <posterr2000@yahoo.com> wrote:
Are there any folks here who could inform/enliten me of
circuits/theory regarding feeding DC pulses into high voltage output
transformers.
You can pretent the circuit will be powered by a battery if you like.
I can simply add a 'battery eliminator' circuit later.
Click to expand...
http://www.homepower.com/magazine/downloads_homebrews.cfm see "A
Time Machine". This might work directly:
http://www.homepower.com/files/electricfence.pdf

The "battery eliminator" will need to be very low impedance, or else
the current pulses into the transformer will be weak and the output
spark will also be weak. The circut works pretty well (seems like I
had to change a couple of resistor values to get the proper timing)
and makes nice hot sparks from a car battery, but fairly soft sparks
from a 7amphour SLA, and very weak sparks from the 12v supply in my
proto board. A few 1000uf capacitors helped, but not much. Also
note, use fairly heavy wire to the power supply for the same reason.

sdb

--
| Sylvan Butler | Not speaking for Hewlett-Packard | sbutler-boi.hp.com |
| Watch out for my e-mail address. Thank UCE. >>>> change ^ to @ <<<< |
It may be better to live under robber barons than under omnipotent moral
busybodies. The robber baron's cruelty may sometimes sleep, his
cupidity may at some point be satiated; but those who torment us for our
own good will torment us without end, for they do so with the approval
of their consciences. -- C. S. Lewis
 
In message
<slrnc9lf0t.4al.Znospam+noZs_0405@hpb13799Z.Zboi.hpZ.com.invalid>,
Sylvan Butler <Znospam+noZs_0405@hpb13799Z.Zboi.hpZ.com.invalid> writes
On 5 May 2004 16:05:42 -0700, oxy <posterr2000@yahoo.com> wrote:
Are there any folks here who could inform/enliten me of
circuits/theory regarding feeding DC pulses into high voltage output
transformers.
You can pretent the circuit will be powered by a battery if you like.
I can simply add a 'battery eliminator' circuit later.

http://www.homepower.com/magazine/downloads_homebrews.cfm see "A
Time Machine". This might work directly:
http://www.homepower.com/files/electricfence.pdf
Click to expand...
I am surprised that the circuit works. When the points of a car ignition
system open, the voltage on the primary of the coil rises to around 300
Volts. Similarly when the 2N3055 turns off its collector voltage will
rise until it reaches its Vceo breakdown voltage (115V IMMSMC),
whereupon the remaining energy is dumped into the transistor.

A better technique is to charge a capacitor up to say 300 Volts and
discharge it through the ignition coil primary using a suitable SCR, say
400 V 10 A rating. You can determine the energy of the pulse by
selecting an appropriate value for the capacitor and you could limit
the peak output voltage by charging to a lower voltage.
--
Graham
 
Chaos Master wrote...
oxy drowning:

I am looking for information on Electric Fence Energisers. Design
information would be great. Has there ever been any books produced
on the subject?

DO NOT DO IT THIS WAY.

This would make an excellent "death trap" for some human that accidentally
touches the fence. As I understand them, electric fences use a high-voltage,
but VERY VERY LOW current (milliamps) and are current-limited.

A while ago (in February IIRC), in my city there were 2 people killed by
electric fences after they accidentally touched the fence.

The fence was ran directly from 110V mains (IIRC, could have been 220V,
because we have both here in Brazil), there was no current-limiting, and
worse: no warning that there was an electric fence nearby.
Click to expand...
It's hard to believe anyone could be so stupid. That story has a high
likelihood of becoming an urban myth. Could you find any backup evidence
for your story, like a web-accessible archive copy of a newspaper article,
or can you do a scan from a newspaper article at your local library?

Thanks,
- Win

(email: use hill_at_rowland-dot-org for now)
 
On a sunny day (9 May 2004 07:21:25 -0700) it happened Winfield Hill
<Winfield_member@newsguy.com> wrote in <c7lep50214o@drn.newsguy.com>:
The fence was ran directly from 110V mains (IIRC, could have been 220V,
because we have both here in Brazil), there was no current-limiting, and
worse: no warning that there was an electric fence nearby.

It's hard to believe anyone could be so stupid. That story has a high
likelihood of becoming an urban myth. Could you find any backup evidence
for your story, like a web-accessible archive copy of a newspaper article,
or can you do a scan from a newspaper article at your local library?

Thanks,
- Win
Not so strange, some one here did it too, with 230 V directly from the mains,
Click to expand...
he went on holiday, and some kid fel into the fence playing the ball.
The police disabled it, and he was arrested when he came back.
Was in the paper.
JP
 
On 9 May 2004 07:21:25 -0700, Winfield Hill
<Winfield_member@newsguy.com> wrote:

It's hard to believe anyone could be so stupid.
Click to expand...
Quite the contrary ... it's hard to believe so many [all?] of the
"Darwin Awards" are made-up urband legends when so many people
actually die because of their own or someone else's stupidity.

That story has a high
likelihood of becoming an urban myth. Could you find any backup evidence
for your story, like a web-accessible archive copy of a newspaper article,
or can you do a scan from a newspaper article at your local library?
Click to expand...
I just googled for:
electrocuted "electric fence"
and got several legitimate-looking stories.

Thanks,
- Win

(email: use hill_at_rowland-dot-org for now)
Click to expand...
-----
http://mindspring.com/~benbradley
 
"Ben Bradley" <ben_nospam_bradley@mindspring.com> wrote in message
news:eek:i9t90phkkho3d6sarlt1o4ift0nlk8ebe@4ax.com...
On 9 May 2004 07:21:25 -0700, Winfield Hill
Winfield_member@newsguy.com> wrote:

It's hard to believe anyone could be so stupid.

Quite the contrary ... it's hard to believe so many [all?] of the
"Darwin Awards" are made-up urband legends when so many people
actually die because of their own or someone else's stupidity.
Click to expand...
I had the impression that the true Darwin Awards were fact-checked,
i.e., verifiable by eyewitness, news articles, etc.

Speaking of legends, I still haven't got a definitive answer on the
"Bill Sux" chip - there are a lot of references to it as a legend,
but I wasn't able to find anything that shows that it was actually
hoaxed up.

And, does anybody know what DeForest Kelley's real epitaph says?

There's a TeeVee show around these parts, called "I'm Still Alive!",
which should be called something like "The Anti-Darwin." It's videos
of people doing abysmally stupid crap, screwing up their stunt, and
surviving.

But, apparently America is one humongous celebration of Mass
Stupidity.

Cheers!
Rich
 
Hey ya, Winfield Hill:

It's hard to believe anyone could be so stupid. That story has a high
likelihood of becoming an urban myth. Could you find any backup evidence
for your story, like a web-accessible archive copy of a newspaper article,
or can you do a scan from a newspaper article at your local library?
Click to expand...
Probably not as my local library does not have newspapers of the date when this
happened. But it appeared on the local TV channels.

[]s

--
Chaos MasterŽ - Posting from Porto Alegre, Brazil
MSN Messenger: Wizard_of_Yendor@hotmail.com / ICQ: 126735906
NetHack in Portuguese: http://nethack-pt.sourceforge.net/
Please do ROT13 to username of e-mail address: erana.ovepx@ibestvip.com.br
Status of Chaos (piously chaotic, of course): Level 678347, HP 684903785
(684903785), AC -(10^56834)
 
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