Electric fence indicators

milkloss

Member
Livestock Farmer
Location
East Sussex
OK, so I'm a cheap skate (actually just spent £300 odd quid on tractor batteries!) and I'm looking for a way of making some neon indicators to show the fence is on. Hoping to make a few actually so you don't have to walk all round the yard to see if nobby has remembered to turn it on :banghead:. The indicators are Usually just neon lights but I presume there's a resistor in there too so I was hoping there's someone that knows....... @Pheasant Surprise usually knows his stuff but testing the knowledge of the TFF massiv!

And, no I'm not grabbing hold of it to make sure it's on, done that too many times with a cracked plastic handle today!
 

Dry Rot

Member
Livestock Farmer
Watching with interest as the LED/neon on my fencer unit died years ago and I am finding it difficult to hear the ticking. Should be easy to replace but there's a few other jobs I need to do first.
 

neilo

Member
Mixed Farmer
Location
Montgomeryshire
that's the one. So who's going to buy one and take it apart for research purposes? :unsure:
Does that one not flash when the power is off/reduced? In which case it would flash when ‘nobby’ Turns it off to do whatever, running the battery down.

Would something like this be another option, flashing with each pulse so you could see on your drive past? https://www.electricfence-online.co...MI_e6spPLW5gIVS7TtCh1GdAu8EAQYBSABEgKY3PD_BwE

Or one powered by the fencer itself (presumably):
 
Last edited:

Dry Rot

Member
Livestock Farmer

Gulli

Member
Livestock Farmer
Location
Somerset
I reckon you could probably rig up a cheapo fence tester so it's always on the fence.
Probably cheaper than making your own.

Or you might be able to find a bulb that's low enough voltage and just connect it into the fence so it switches on and off with the pulse
 

milkloss

Member
Livestock Farmer
Location
East Sussex
Being a cheapskate, I saw rhis at a tenner.


nice and cheap but hard to see 30yards away in daylight.
Does that one not flash when the power is off/reduced? In which case it would flash when ‘nobby’ Turns it off to do whatever, running the battery down.

Would something like this be another option, flashing with each pulse so you could see on your drive past? https://www.electricfence-online.co...MI_e6spPLW5gIVS7TtCh1GdAu8EAQYBSABEgKY3PD_BwE

Or one powered by the fencer itself (presumably):

Hmm, yes, want to see it fire in sync with the fencer. I’m thinking a mosfet fired using inductance from the fence which switches on a high output led using a little 3v lithium battery. It means no draw on the fence and bright enough to see at a distance.
 

Dry Rot

Member
Livestock Farmer

milkloss

Member
Livestock Farmer
Location
East Sussex

milkloss

Member
Livestock Farmer
Location
East Sussex
You'd think that they'd rig it so that it wouldn't need a battery replacing, ever. After all, it has access to a source of power...

they use a voltage comparator that uses the battery to fire the indicator light. That way no current is drawn from the fence. This is better because a higher brightness led could be used which would be more visible at distance.
 

Danllan

Member
Location
Sir Gar / Carms
they use a voltage comparator that uses the battery to fire the indicator light. That way no current is drawn from the fence. This is better because a higher brightness led could be used which would be more visible at distance.
It will come as no surprise to you that my electrical genius and knowledge extends no further that a typical vehicle electrical net... Unfortunately it just doesn't click with me, chemistry and most physics yes, but practical electrics, no. :(
 
851937
20200105_122825.jpg


This chap will have or know what your after.
 

som farmer

Member
Livestock Farmer
Location
somerset
851937
20200105_122825.jpg


This chap will have or know what your after.
we have a big boy from him, scares the hell out of us, a keeper friend, who shoots our foxes, is terrified of it, 1 touch trained him ! The advantage is, the cows seldom get out, the disadvantages are, you might touch it, and cattle, if out, will NOT cross over even if it is on the ground !!
 
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