Jaycar electric fence module

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My BIL has boxer dogs that escape his small backyard.
He wants an electric fence module that can drive 10 or
20 metres of perimeter wire to dissuade them. They're
smart dogs and he reckons a couple of jolts and they'll
stay in for a long while. There used to be kits, but
it'd be much easier for him if the little Jaycar module
would work. They reckon they're only powerful enough to
keep rodents out of a veggie patch, but has anyone tried
one on a backyard fence and reckons it works?

Otherwise what's the best way to get hold one of the
old designs and parts to build it? I assume the PCBs
are available from RCS... Oatley, Jaycar, DSE, all seem
to have stopped stocking it. Jaycar's Jacob's ladder
kit is the same PCB - is the circuit assembled differently?
I thought e-fences should be pulsed, but the JL needs

Clifford Heath.

Re: Jaycar electric fence module

"Clifford Heath"
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**  Electric fence style perimeter restriction works well for bovines.

But is not effective for canines  - aka man's best friend.

Any attempt to use it against felines would be doomed from the beginning.

They would resent it to the  ABSOLUTE  max.

.......  Phil

Re: Jaycar electric fence module

Hi Cliford,

I built one of these kits some years ago to try and keep my dogs of the
garden. It simply doesn't have enough kick to be effective. In the end, the
dogs were using it as a toy. I finally relented and went to the local farm
supply store and purchased a small electric fence module for about $150. The
first time they got a kick off it they went to the other side of the yard
and haven't been near the garden since. We haven't had it switched on for
two years. If I put some of the white tape anywhere in the yard, they refuse
to go near that either (even with their dinner in it). I wouldn't waste my
time with the kit, I spent over $80 (including 2 car coils) for no result.

Hope this helps although it's probably not what you wanted to hear.


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Re: Jaycar electric fence module

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Commercial designs all pulse on around a 1.2 sec cycle, which is
supposedly a design rule (possibly from NZ which led the way in the
early energiser designs).  There are also rules covering maximum
voltage and pulse energy.  It's a fair bet this is why Jaycar no
longer market the JL circuit as a fence enegiser (the circuit is the
same).  Nor is it very effective.

The commercial designs are all capacitor discharge and use either an
inverter (DC models), or voltage doubler (mains models) to obtain a
respectable primary voltage (2*240*1.414 for the doubler).  The
biggest problem with building one is to obtain a suitable HT
transformer other than buying it as an energiser spare part.  The
energiser manufacturers are probably well of the fact and seem to
price their transformers accordingly.

There are a number of commercial units that are ideal for what BIL has
in mind (and he's also part of a large market).  Personal experience
suggests that Gallagher are the way to go, both in design and ease of
repair should the need arise.  Mini B11 is their smallest battery
operated unit and there's probably a compatable mains unit.  Inquire
at a stock and station agent (Wesfarmers sell Gallagher where I am).

If you want to save a buck you can buy Gallagher modules as a spare
part (usually for around half the price of an encased unit).  The B11
module is a complete unit, most of the others aren't (they're usually
minus the output transformer).

John H

Re: Jaycar electric fence module

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Re: Jaycar electric fence module

A few component changes is the only difference between the JL and

Clifford Heath wrote:
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Re: Jaycar electric fence module

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Go and get an electric fence unit off the shelf from an agricultural


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