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Post by j4e8a16n on Jun 16, 2017 5:52:49 GMT -8
Hi, Questions. If I understand for a part of it. When first 555 is on the second 555 takes the current available and make pulses with it.and send them to the third one. For example. If the first 555 is on for 10 ms the second one can make 10 pulses of 1ms or 2 of 5ms, etc. What is the utility of the third one? It will stop the previous pulses (reset) and start the new ones arriving from the second 555? I find it strange to see the timing caps being 10 uF and 18 uF for the second 555. What is the maximum number of amps it can draw for a 100 feet fence? What is the number of amps for the fuse to use? Well, that's abour all for now? ;o) JP
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Post by Gary Lecomte on Jun 16, 2017 5:59:25 GMT -8
Less than 1/4 Amp of Average Current. The Current Draw has Nothing to do with the Length of Fence. The Current Draw will be the Same for Any Length of fence.
QUOTE: "I find it strange to see the timing caps being 10 uF and 18 uF for the second 555." NOT 18 uF, it is .18 uF.
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Post by j4e8a16n on Jun 17, 2017 9:33:41 GMT -8
Thanks for you answers.
I wonder if I ' suppose ' 1000 volts for a mm of arc.
3mm = 3000 volts
50% duty cycle = 1500 volts
Do I make sense?
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Post by Gary Lecomte on Jun 17, 2017 10:16:44 GMT -8
Maybe as a ROUGH GUIDE LINE.
Changing Duty Cycle Results in LESS Current in the Arc, So Less ability to Ionize the air.
The Distance of the arc is Somewhat dependent on Voltage and Distance. But it is also dependant on the Surface's, where the arc is created. Also Dependant on Humidity of the Air, possibly also the Ambient Air Temperature. I Suspect also Air Pressure.(Are you at Sea Level or High Up on a Mountain, even less in a high Vacuum.)
For a Given Voltage, A Very Sharp "PIN Point" will give the Greatest Arc Distance. For the Same Voltage, A Blunt Point will be Less Arc Distance. For the Same Voltage, A Ball shape will be the LEAST Arc Distance. (And Bigger Balls, Less Distance.)
EDIT: With my Car Coil Driver and Two Sharp Points, I am getting a spark of 17mm. Increasing the Gap wider, It Arks across the Surface from the Top of the Coil to the Negative Terminal. Probably with Good HV Insulation I would get a 20 to 25mm Spark
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Post by j4e8a16n on Jun 27, 2017 11:10:09 GMT -8
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Post by j4e8a16n on Jul 25, 2017 3:41:10 GMT -8
A very good animated explanation for the fencer circuit:
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Post by radioman on Jul 27, 2017 18:22:55 GMT -8
j4e8a16n, Thank you for posting your video Salade Extreme. My Fencer 2 installation in my garden is similar and I found it interesting how you hung your wires on the posts close to the ground and kept them separated. I, too, packaged my Fencer 2 in a plastic container and I've found the circuit to be quite a reliable performer as seem from not having my garden vegetables eaten this year! If you haven't seen Gary's pictures of his garden elsewhere in this forum, he shows another effective way to stringing of his wires in his garden.
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Post by j4e8a16n on Aug 6, 2017 7:35:05 GMT -8
Here is a LTSpice asimulation. You are welcomed to improve it. If it takes too long press escape to end the simulation and get some results.
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Post by j4e8a16n on Aug 6, 2017 13:26:39 GMT -8
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Post by Gary Lecomte on Aug 7, 2017 7:02:27 GMT -8
Who Cares How it Simulates, It is How good it works in REAL LIFE.
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Post by j4e8a16n on Aug 7, 2017 7:55:48 GMT -8
Who Cares How it Simulates, It is How good it works in REAL LIFE. I do. Circuits don't grow in trees. If it does not performs in real life or if you want to progress, be the best in the world, you have to think back (reflect, feedback). I am not a dumb consumer kind of a chicken with no head. I am a learner. Is this an electronic forum?
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Post by Gary Lecomte on Aug 7, 2017 10:03:49 GMT -8
Yes this is an Electronic Forum, But Soon to be DELETED as is my website.
I have Simulated Many Circuit that work in Simulation but Not in Real Life. And many that work in Real Life but don't work the same in Simulation. Simulation work with "IDEAL PARTS" that don't really Exist.
My Opinion, Prototyping and Testing Real Circuits is the best way to learn. Unfortunately Not as Cheap.
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Post by j4e8a16n on Aug 7, 2017 12:05:28 GMT -8
Yes. You don,t learn how to use an hammer in books. It is at least a good way to learn and a good sketching pad. I don't use a pcb software to make my boards. I draw them with a pencil or so. Most of the time I use trough ho;es components and wires.... Have a good day and may my posts disappear in peace .
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