Depending on where you are located you can find a lot of products to do this, for example, in the US:
https://www.tractorsupply.com/tsc/catalog/electric-fencing
But, in any case, the way to do it is to buy commercial products, the complexity of safety related things and all the details of a successful deployment make homebrew very dodgy unless you didn't have to ask this question.
The thick wool of the sheep likely prevents it from getting a shock.I have one, but it's too weak, that's why I want to make my own with a higher voltage output.
The one I have is also homemade, it uses an ignition coil and a relay. The power is generated from a 12v battery charger. It's pretty weak, my sheeps can play with itThe thick wool of the sheep likely prevents it from getting a shock.
There are a number of fencer designs (here) that use an ignition coil to generate a higher voltage than a typical fence charger.
The are generally safe if powered from a transformer supply or a battery, since an ignition coil can't generate a lethal amount of energy (otherwise there would be a lot of dead car mechanics).
I don't have an insuranceWould your insurance cover a home-made electric fence?
Hello Eric,hi Selve,
Sheep are very difficult to 'shock' , all that wool and Lanolin.
Have you tried different settings for the relay Dwell time.?
I managed to get my design working with sheep OK, on our South African farm
Post you circuit diagram.
E
Hello Eric, sorry for the late answer and thank you for your diagrams.hi S,
I can see lots of problems with that fencer unit, it will never give you the high voltage required for a good electric fence.
This my circuit diagram.
E
Added an image of your circuit.
The highest voltage from that circuit is approx 10kVolt