That's a great device. I love that it was purely electromechanical.When I was a youngster on my home farm, we had a line-powered Surge brand fencer (below).
That's a great device. I love that it was purely electromechanical.When I was a youngster on my home farm, we had a line-powered Surge brand fencer (below).
Braking news, Man found dead on his electric fence.And, since he hasn't replied to any of our posts recently, ...............
We also had some other fencers before that, which used a sort of spring loaded oscillating wheel to momentary close mechanical contacts and generate the spark.I love that it was purely electromechanical.
Mercury switches and reed relays have a special place in my heart.We also had some other fencers before that, which used a sort of spring loaded oscillating wheel to momentary close mechanical contacts and generate the spark.
Problem was the contacts would wear out, causing a failure of the fencer.
The Surge mercury switch solved that problem.
You can, but it must be AC, not DC. All electric fences for animals are essentially AC (or should be). Some 'cheat' with oscillating DC. Never use constant DC. DC will burn, can cause fires, etc. AC will 'buzz' and startle. Use a transformer to drop 120VAC to 12VAC, and then keep the current to an acceptable (very low) level. Use appropriate fusing, etc- Be smart about it.Hello guys, I need to make an electric fence for my goat. Can you please help me and give me an easy method to make it?
Certainly you don't mean to connect the 12Vac directly to the fence, since 12Vac cannot cause a shock.Use a transformer to drop 120VAC to 12VAC,
You don't feel 12VAC low-current as a shock, but instead as a buzz. I know, because I've gotten across such electric fencing before. However, having said that, a little extra digging shows that today's electric fences may simply store a charge, waiting for it to be grounded, and dumped that. Other designs exist:Certainly you don't mean to connect the 12Vac directly to the fence, since 12Vac cannot cause a shock.
The TS stated he wants to have a battery powered fencer.
The fencer electronics turns that into a high voltage, periodic pulse to the fence.
I'm quite sure that was more than 12Vac.You don't feel 12VAC low-current as a shock, but instead as a buzz. I know, because I've gotten across such electric fencing before.
From a correctly functioning "cow" typefence the spark will jump about a quarter inch to a well grounded wire. Just one pop and then a second later another pop. Cows get a few shocks because it takes them a while to figure it out. A"horse" type charger makes a half inch spark that is a bit louder, because a horse needs more convincing tha a domestic cow.Unless he stuck his tongue on it.
I stand corrected.Here is an example of it being displayed every time you open the Ford IDS dealer software.
Why 20Vdc instead of 12V?I intend using an older AC Delco coil, from some out there on other sites, a 0.1sec pulse every sec appears popular.
20VDC and a Mosfet switch
If the turn on time of the transistor is adjusted to be short enough so the primary current doesn't exceed the normal maximum, then you wouldn't need a resistor.I will include the customary ballast resistor.
by Jake Hertz
by Duane Benson
by Duane Benson
by Duane Benson