Here are the pics of the screen of the pcb program... where it gets designed from scratch on the run.. so no circuits unless you do one for everyone else.
To get the values up, the screen shot does not fit, so print them out and mosaic them if you have to.
Transformer is from a micro wave. Split open wiring discarded, and rewound as per instructions ... wind it as a HV transformer... ie separate each layer of wire to stop arcing internally.
First part of the screen
second part of the screen
pattern complete
wiring of the power transformer. Ignore the battery step up instruction.... just the top instructions
I may get some finished pics for you later today.
Notes: This is the newer version, and is a trippler. So it can develop 900 volts on the primary of the output transformer... beware!!
The trim pot next to the diac is about 100k.
The 1 and 2 uf caps on the board should be AC types. I find the 375vac ones to be fine.
The 1uf cap at the bottom center is 50v. It won't trigger without this cap.
The neon is anything you can find... just a signal for you, does nothing else.
Transformer terminals are marked.
The storage caps will need to be 900vdc or use 2 x 400vac 20uf or more in series instead. They use the terminals marked cap
On the left are the 240v inputs... marked as active and neutral.
Be very careful, this is a large size fencer, and good for 80km or more of fence... it is not a toy.
The bifilar primary is two in hand 1.8mm wire. The secondary is 1mm wire. It is mains connected, so double insulation of the primary from the secondary is mandatory, and of the primary and the core..
This is a low impedance fencer, and will develop 250000 watts or more for millionths of a second.... don't be on the wrong end. The pulse won't kill as the duration is too small, but it will sit you down very powerfully...... multiple pulses (getting snared/caught in fence) will probably kill eventually... so
DO NOT USE BARBED WIRE IN AN ELECTRIFIED FENCE it is illegal for this reason.
Keep the pulse rate to a second or MORE not less. You need time to get away from the fence if hit. The 680r can be increased for this.
The 100k pot changes the step off voltage, and as such affects the frequency of pulse.
The 900v on the primary will kill. It is both mains connected and 900v as well. Treat it carefully, even if using an isolation transformer for testing.
Unless your competent at building mains circuits, this is not for you unsupervised.
If your only half confident, get some supervision from a competent person. These circuits are dangerous things, and need to be treated as such.Always have a 500r 20w resistor across the output in place of the fence to keep extra high voltage from damaging your transformer. Unloaded these will run 10000v or more.
These fencers are dangerous.... yes, but not overly so... example is I am surrounded on this island by thousands of kilometers of electrified fences, so while the warnings are justified, they are not to be feared, but due care and caution is mandatory...... the darn things bite hard.
I have seen wallaby dead in fences around the place, and heard of cows dead in fences too. So prolonged exposure to pulses will kill huge beasts of 1000kg or more. Don't allow yourself to get in that position. Be very wary.
...................oztules
