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Electric slug fence
Decided to make an electric slug fence yesterday, after my new
autumn crocus shoots got eaten for the second night in a row. http://www.facebook.com/photo.php?pi...&id=1619546457 http://www.facebook.com/photo.php?pi...&id=1619546457 No slug damage this morning! -- Andrew Gabriel [email address is not usable -- followup in the newsgroup] |
Electric slug fence
Decided to make an electric slug fence yesterday, after my new
autumn crocus shoots got eaten for the second night in a row. No slug damage this morning! Hehehehe how are you powering it, can't quite tell from the pics |
Electric slug fence
In article ,
Colin Wilson o.uk writes: Decided to make an electric slug fence yesterday, after my new autumn crocus shoots got eaten for the second night in a row. No slug damage this morning! Hehehehe how are you powering it, can't quite tell from the pics PP3 (9V) battery, in series with a 470 ohm resistor and a high efficiency LED (plus the earth rod resistance). The LED lights to tell you there's some leakage current (high efficiency one means you can see even fraction of a milliamp leakage at night). It flashes quite brightly when a slug touches the contact. Given the dramatic effect on a couple of slugs and a snail which I saw approch it last night, I suspect a much lower voltage would work fine too. It's probably not safe to use such a scheme if you have livestock nearby, due to their vulnerability to very low earth leakages. Construction is 25mm PVC conduit with 12mm galvamised capping screwed to the top. The profile of the capping is perfect for rain water shedding from the top. I tried a deluge from a watering can rose, and even that didn't cause the LED to light. Just touching the rail whilst kneeling on the ground generates enough current to light the LED though. Water droplets bead on the surface of the PVC, so it won't conduct. It might be that it needs lifting and wiping clean occasionally to maintain this, but I haven't had it deployed for long enough to know yet. Ground needs to be very level. I filled in a couple of dips under the fence with some old building sand. A couple of tiny slugs appeared inside the area, presumably sleeping inside the fence when it was positioned. After removal, no more were seen inside. I'll keep an eye out over the next few nights. Can easily test the battery just by touching the rail and ground with a hand. Operation probably requires that the area stays damp, but a) that's needed for the plants anyway, and b) slugs don't tend come out when the ground is very dry. -- Andrew Gabriel [email address is not usable -- followup in the newsgroup] |
Electric slug fence
Andrew Gabriel wrote:
Decided to make an electric slug fence yesterday, after my new autumn crocus shoots got eaten for the second night in a row. http://www.facebook.com/photo.php?pi...&id=1619546457 http://www.facebook.com/photo.php?pi...&id=1619546457 No slug damage this morning! Brilliant! Until the animal rights activists (mollusc protection section) get to know about it. -- Dave - The Medway Handyman www.medwayhandyman.co.uk |
Electric slug fence
Andrew Gabriel
wibbled on Sunday 27 September 2009 11:03 In article , Colin Wilson o.uk writes: Decided to make an electric slug fence yesterday, after my new autumn crocus shoots got eaten for the second night in a row. No slug damage this morning! Hehehehe how are you powering it, can't quite tell from the pics PP3 (9V) battery, in series with a 470 ohm resistor and a high efficiency LED (plus the earth rod resistance). The LED lights to tell you there's some leakage current (high efficiency one means you can see even fraction of a milliamp leakage at night). It flashes quite brightly when a slug touches the contact. Given the dramatic effect on a couple of slugs and a snail which I saw approch it last night, I suspect a much lower voltage would work fine too. It's probably not safe to use such a scheme if you have livestock nearby, due to their vulnerability to very low earth leakages. Construction is 25mm PVC conduit with 12mm galvamised capping screwed to the top. The profile of the capping is perfect for rain water shedding from the top. I tried a deluge from a watering can rose, and even that didn't cause the LED to light. Just touching the rail whilst kneeling on the ground generates enough current to light the LED though. Water droplets bead on the surface of the PVC, so it won't conduct. It might be that it needs lifting and wiping clean occasionally to maintain this, but I haven't had it deployed for long enough to know yet. Ground needs to be very level. I filled in a couple of dips under the fence with some old building sand. A couple of tiny slugs appeared inside the area, presumably sleeping inside the fence when it was positioned. After removal, no more were seen inside. I'll keep an eye out over the next few nights. Can easily test the battery just by touching the rail and ground with a hand. Operation probably requires that the area stays damp, but a) that's needed for the plants anyway, and b) slugs don't tend come out when the ground is very dry. Wow - I was looking at the jar trying to see the 10kV inverter circuit you made... But I suppose slimy slugs have a pretty low resistance so I can see how 9V really gives them a spike (cf: anyone else, try licking the terminals of a PP3). You should market that - it's simple and, powered by a pp3 at 9V, pretty idiot proof. -- Tim Watts This space intentionally left blank... |
Electric slug fence
On 27 Sep, 11:03, (Andrew Gabriel) wrote:
In article , Colin Wilson o.uk writes: Decided to make an electric slug fence yesterday, after my new autumn crocus shoots got eaten for the second night in a row. http://www.facebook.com/photo.php?pi...&id=1619546457 http://www.facebook.com/photo.php?pi...&id=1619546457 No slug damage this morning! Hehehehe how are you powering it, can't quite tell from the pics PP3 (9V) battery, in series with a 470 ohm resistor and a high efficiency LED (plus the earth rod resistance). The LED lights to tell you there's some leakage current (high efficiency one means you can see even fraction of a milliamp leakage at night). It flashes quite brightly when a slug touches the contact. Given the dramatic effect on a couple of slugs and a snail which I saw approch it last night, I suspect a much lower voltage would work fine too. It's probably not safe to use such a scheme if you have livestock nearby, due to their vulnerability to very low earth leakages. Construction is 25mm PVC conduit with 12mm galvamised capping screwed to the top. The profile of the capping is perfect for rain water shedding from the top. I tried a deluge from a watering can rose, and even that didn't cause the LED to light. Just touching the rail whilst kneeling on the ground generates enough current to light the LED though. Water droplets bead on the surface of the PVC, so it won't conduct. It might be that it needs lifting and wiping clean occasionally to maintain this, but I haven't had it deployed for long enough to know yet. Ground needs to be very level. I filled in a couple of dips under the fence with some old building sand. A couple of tiny slugs appeared inside the area, presumably sleeping inside the fence when it was positioned. After removal, no more were seen inside. I'll keep an eye out over the next few nights. Can easily test the battery just by touching the rail and ground with a hand. Operation probably requires that the area stays damp, but a) that's needed for the plants anyway, and b) slugs don't tend come out when the ground is very dry. -- Andrew Gabriel [email address is not usable -- followup in the newsgroup] Fantsastic! I've taken the liberty of cross-posting from uk.d-i-y to uk.rec.gardening where I'm a long-term lurker, they'll be interested. |
Electric slug fence
On Sep 27, 10:20*am, (Andrew Gabriel)
wrote: Decided to make an electric slug fence yesterday, after my new autumn crocus shoots got eaten for the second night in a row. http://www.facebook.com/photo.php?pi...&id=1619546457 No slug damage this morning! This looks like a good one for the wiki. Would you mind the pic being posted there? NT |
Electric slug fence
On 27/09/09 12:00, Anthony R. Gold wrote:
On Sun, 27 Sep 2009 11:21:26 +0100, Tim wrote: You should market that - it's simple and, powered by a pp3 at 9V, pretty idiot proof. Darwin says to wait for the evolution of slugs with jumper leads. Or that adapt their tentacles for burrowing. |
Electric slug fence
wrote in message
... On 27 Sep, 11:03, (Andrew Gabriel) wrote: In article , Colin Wilson o.uk writes: Decided to make an electric slug fence yesterday, after my new autumn crocus shoots got eaten for the second night in a row. http://www.facebook.com/photo.php?pi...&id=1619546457 http://www.facebook.com/photo.php?pi...&id=1619546457 No slug damage this morning! Hehehehe how are you powering it, can't quite tell from the pics PP3 (9V) battery, in series with a 470 ohm resistor and a high efficiency LED (plus the earth rod resistance). The LED lights to tell you there's some leakage current (high efficiency one means you can see even fraction of a milliamp leakage at night). It flashes quite brightly when a slug touches the contact. Given the dramatic effect on a couple of slugs and a snail which I saw approch it last night, I suspect a much lower voltage would work fine too. It's probably not safe to use such a scheme if you have livestock nearby, due to their vulnerability to very low earth leakages. Construction is 25mm PVC conduit with 12mm galvamised capping screwed to the top. The profile of the capping is perfect for rain water shedding from the top. I tried a deluge from a watering can rose, and even that didn't cause the LED to light. Just touching the rail whilst kneeling on the ground generates enough current to light the LED though. Water droplets bead on the surface of the PVC, so it won't conduct. It might be that it needs lifting and wiping clean occasionally to maintain this, but I haven't had it deployed for long enough to know yet. Ground needs to be very level. I filled in a couple of dips under the fence with some old building sand. A couple of tiny slugs appeared inside the area, presumably sleeping inside the fence when it was positioned. After removal, no more were seen inside. I'll keep an eye out over the next few nights. Can easily test the battery just by touching the rail and ground with a hand. Operation probably requires that the area stays damp, but a) that's needed for the plants anyway, and b) slugs don't tend come out when the ground is very dry. -- Andrew Gabriel [email address is not usable -- followup in the newsgroup] Fantsastic! I've taken the liberty of cross-posting from uk.d-i-y to uk.rec.gardening where I'm a long-term lurker, they'll be interested. you might even be able to do this without a battery! remember the earth clock that uses a copper tic and a zinc covered steel nail. Each copper nail and tack make a cell of about 1 volt of Lecky. |
Electric slug fence
On Sun, 27 Sep 2009 10:03:26 +0000 (UTC), Andrew Gabriel wrote:
A couple of tiny slugs appeared inside the area, presumably sleeping inside the fence when it was positioned. I wonder if they where small enough to crawl fully up onto the PVC then across the capping without touching "ground" at the same time? I guess their slim trail would be conductive enough assuming it was contiguious. -- Cheers Dave. |
Electric slug fence
On Sun, 27 Sep 2009 13:51:50 +0100, Andy Burns wrote:
On 27/09/09 12:00, Anthony R. Gold wrote: On Sun, 27 Sep 2009 11:21:26 +0100, Tim wrote: You should market that - it's simple and, powered by a pp3 at 9V, pretty idiot proof. Darwin says to wait for the evolution of slugs with jumper leads. Or that adapt their tentacles for burrowing. or develop high resistance slime; if the resistance is adjustable they'll be gastropots. -- Peter. The head of a pin will hold more angels if it's been flattened with an angel-grinder. |
Electric slug fence
"PeterC" wrote in message .. . On Sun, 27 Sep 2009 13:51:50 +0100, Andy Burns wrote: On 27/09/09 12:00, Anthony R. Gold wrote: On Sun, 27 Sep 2009 11:21:26 +0100, Tim wrote: You should market that - it's simple and, powered by a pp3 at 9V, pretty idiot proof. Darwin says to wait for the evolution of slugs with jumper leads. Or that adapt their tentacles for burrowing. or develop high resistance slime; if the resistance is adjustable they'll be gastropots. I'm aghast. Bill |
Electric slug fence
On Sun, 27 Sep 2009 09:20:26 +0000, Andrew Gabriel wrote:
No slug damage this morning! Are there lots of electric slugs in your area? :-) Can slugs swim? Wondering if a moat around the garden would achieve the same end but maybe have less maintenance requirements (given need for watering plants anyway)? |
Electric slug fence
On Sep 27, 9:20 pm, (Andrew Gabriel)
wrote: Decided to make an electric slug fence yesterday, after my new autumn crocus shoots got eaten for the second night in a row. http://www.facebook.com/photo.php?pi...&id=1619546457 No slug damage this morning! I was going to make a slug/snail electric fence for my new garden. I already have a 12 volt DC supply nearby so I was intending to run two bare copper wires about a quarter of an inch apart on the timber around the garden. After reading this I will put a resistor in the supply line! |
Electric slug fence
On Sep 28, 12:08*am, wrote:
I'm plauged with cats, crapping on the lawn. Any designs for electric cat fences? Prolly need 25v or more to give enough across the cojones to warn them off. The orange DIY shed(warehouse variety) sells a device that is PIR mounted below a sprinkler. Leave connected to the hose and when an animal walks in front of the sensor it gives a 5 second burst of water as well as making a clicking sound. There is an adjustment for the range of the PIR. Costs around £25. It does work well and if you keep moving the device around the garden they will avoid the entire place. You can also buy a device called ssscat which works well(search on youtube to see examples). Shame the refills are only good for 150 sprays unless someone can recommend a safe way of repressurising an air duster can. Dave |
Electric slug fence
Dave Starling wrote:
On Sep 28, 12:08 am, wrote: I'm plauged with cats, crapping on the lawn. Any designs for electric cat fences? Prolly need 25v or more to give enough across the cojones to warn them off. The orange DIY shed(warehouse variety) sells a device that is PIR mounted below a sprinkler. Leave connected to the hose and when an animal walks in front of the sensor it gives a 5 second burst of water as well as making a clicking sound. There is an adjustment for the range of the PIR. Costs around £25. It does work well and if you keep moving the device around the garden they will avoid the entire place. You can also buy a device called ssscat which works well(search on youtube to see examples). Shame the refills are only good for 150 sprays unless someone can recommend a safe way of repressurising an air duster can. Dave Just occurred to me that I never see slugs on the fence, and potted plants stood on a length of wooden gravel board don't seem to be attacked. It's either the preservative or the surface texture they don't like. Maybe a case for decking after all. |
Electric slug fence
On 27 Sep, 16:09, "Dave Liquorice"
wrote: On Sun, 27 Sep 2009 10:03:26 +0000 (UTC), Andrew Gabriel wrote: A couple of tiny slugs appeared inside the area, presumably sleeping inside the fence when it was positioned. I wonder if they where small enough to crawl fully up onto the PVC then across the capping without touching "ground" at the same time? I guess their slim trail would be conductive enough assuming it was contiguious. -- Cheers Dave. an excellent idea! IMHO tis indeed the littlest b*ggers that do the most eating - anychance AG can do some controlled testing with assorted sized slugs with a tasty hosta/petunia/dahlia/delphinium salad as bait? cheers JimK |
Electric slug fence
You do all know that slugs won't cross a copper wire even if it is not connected to a PSU. |
Electric slug fence
On Sep 27, 11:53*pm, Matty F wrote:
On Sep 27, 9:20 pm, (Andrew Gabriel) wrote: Decided to make an electric slug fence yesterday, after my new autumn crocus shoots got eaten for the second night in a row. http://www.facebook.com/photo.php?pi...17&id=16195464... No slug damage this morning! I was going to make a slug/snail electric fence for my new garden. I already have a 12 volt DC supply nearby so I was intending to run two bare copper wires about a quarter of an inch apart on the timber around the garden. After reading this I will put a resistor in the supply line! My wife will be interested in this. But please explain to me what the resistor is for? I'm sure my physics GCSE (grade B, 1988) will stretch to me actually understanding it, but I can't bring enough pre- existing knowledge to understand it on my own!! Also, why the LED? Perhaps a full "how to build an electric slug fence" guide is required? THanks Matt |
Electric slug fence
On 28 Sep, 10:25, larkim wrote:
On Sep 27, 11:53 pm, Matty F wrote: On Sep 27, 9:20 pm, (Andrew Gabriel) wrote: Decided to make an electric slug fence yesterday, after my new autumn crocus shoots got eaten for the second night in a row. http://www.facebook.com/photo.php?pi...17&id=16195464... No slug damage this morning! I was going to make a slug/snail electric fence for my new garden. I already have a 12 volt DC supply nearby so I was intending to run two bare copper wires about a quarter of an inch apart on the timber around the garden. After reading this I will put a resistor in the supply line! My wife will be interested in this. But please explain to me what the resistor is for? I'm sure my physics GCSE (grade B, 1988) will stretch to me actually understanding it, but I can't bring enough pre- existing knowledge to understand it on my own!! Also, why the LED? Perhaps a full "how to build an electric slug fence" guide is required? THanks Matt maybe the design could be "tweaked" to kill the b*ggers rather than merely put them off? or am i being dangerously over optimistic..... JimK |
Electric slug fence
In article ,
NT writes: On Sep 27, 10:20*am, (Andrew Gabriel) wrote: Decided to make an electric slug fence yesterday, after my new autumn crocus shoots got eaten for the second night in a row. http://www.facebook.com/photo.php?pi...&id=1619546457 No slug damage this morning! This looks like a good one for the wiki. Would you mind the pic being posted there? That's fine, but I suggest to wait a bit - one night alone doesn't mean much yet. Yesterday in the bright sun, the lengths of PVC and steel bowed in the heat a bit, like large bi-metal strips, so I really need slotted holes drilled in the steel. By evening when the slugs appear, it was all laying flat again. Last night, there was a tiny leakage, just visible as a faint glow in the LED if I switched off all the lights. Only a fraction of a milliamp, but it will reduce battery life. I notice some soil has been splashed up the PVC by my watering (it hasn't rained here). I'm going to try some wax polish on the PVC if I get a chance before tonight, to enhance the water repellent effect. -- Andrew Gabriel [email address is not usable -- followup in the newsgroup] |
Electric slug fence
In an earlier contribution to this discussion,
dennis@home wrote: You do all know that slugs won't cross a copper wire even if it is not connected to a PSU. Yes indeed. Any thoughts on how well a copper frame would work - made out of 4 lengths of 15mm copper pipe with elbows at the corners? Obviously, it would tarnish over time. Would tarnished copper still repel slugs? -- Cheers, Roger ______ Email address maintained for newsgroup use only, and not regularly monitored.. Messages sent to it may not be read for several weeks. PLEASE REPLY TO NEWSGROUP! |
Electric slug fence
On Mon, 28 Sep 2009 00:08:13 +0100, me9 wrote:
On 27 Sep, Jules wrote: On Sun, 27 Sep 2009 09:20:26 +0000, Andrew Gabriel wrote: No slug damage this morning! Are there lots of electric slugs in your area? :-) Can slugs swim? Wondering if a moat around the garden would achieve the same end but maybe have less maintenance requirements (given need for watering plants anyway)? You need a good expense account for moats. :-) Not on that scale - was idly thinking some PVC pipe split down the middle to make the channels, then glued with normal pipe joint stuff to make them hold water. Disadvantage that it needs to all be level, unlike the electric version... I'm plauged with cats, crapping on the lawn. Ours do OK in the warmer months. But the garage has a dirt floor, so you can imagine what happens when the lawns are frozen solid :-( cheers Jules |
Electric slug fence
dennis@home wrote:
You do all know that slugs won't cross a copper wire even if it is not connected to a PSU. I wouldn't bank on it |
Electric slug fence
On Mon, 28 Sep 2009 08:08:43 -0500, Jules wrote:
... was idly thinking some PVC pipe split down the middle to make the channels, then glued with normal pipe joint stuff to make them hold water. Seems a lot of work. Why not buy it off the shelf complete with proper water tight joints? It's called guttering... -- Cheers Dave. |
Electric slug fence
On 27 Sep, 10:20, (Andrew Gabriel) wrote:
Decided to make an electric slug fence yesterday, after my new autumn crocus shoots got eaten for the second night in a row. http://www.facebook.com/photo.php?pi...&id=1619546457 No slug damage this morning! -- Andrew Gabriel [email address is not usable -- followup in the newsgroup] It might not be permanent - it's only stopping slugs which are outside the perimeter. If the bed of earth/compost is on earth they might well come up from underneath - which is where they spend most of their time. I'm surprised that you've lost autumn crocus to slugs, mine have given the best show ever this year and we're certainly not short of slugs. Mary |
Electric slug fence
On Mon, 28 Sep 2009 16:02:42 +0100, Dave Liquorice wrote:
On Mon, 28 Sep 2009 08:08:43 -0500, Jules wrote: ... was idly thinking some PVC pipe split down the middle to make the channels, then glued with normal pipe joint stuff to make them hold water. Seems a lot of work. Why not buy it off the shelf complete with proper water tight joints? It's called guttering... Yes and no - I don't think guttering joints are designed for continual submersion, plus as the joints expanded and contracted they might pull dirt in and then fail. I expect it'd work for a few years, then need some tinkering with. 'course any moat system still needs clearing from debris, possibly much more frequently than Andrew's electrical system (where stuff will tend to blow/fall off, rather than collecting in a trough) |
Electric slug fence
In article . com,
Jules writes: On Sun, 27 Sep 2009 09:20:26 +0000, Andrew Gabriel wrote: No slug damage this morning! Are there lots of electric slugs in your area? :-) Can slugs swim? Wondering if a moat around the garden would achieve the same end but maybe have less maintenance requirements (given need for watering plants anyway)? Yes, they can swim, sort of. I dropped one in the toilet, which had made its way indoors through a hole in the wall. It managed to wiggle to the side and then climb up the porcelain. It held on tightly enough to resist flushing. -- Andrew Gabriel [email address is not usable -- followup in the newsgroup] |
Electric slug fence
In message , Andrew Gabriel
writes In article . com, Jules writes: On Sun, 27 Sep 2009 09:20:26 +0000, Andrew Gabriel wrote: No slug damage this morning! Are there lots of electric slugs in your area? :-) Can slugs swim? Wondering if a moat around the garden would achieve the same end but maybe have less maintenance requirements (given need for watering plants anyway)? Yes, they can swim, sort of. I dropped one in the toilet, which had made its way indoors through a hole in the wall. It managed to wiggle to the side and then climb up the porcelain. It held on tightly enough to resist flushing. Wrap 'em in toilet paper first, then flush, that sorts the buggers. -- bof at bof dot me dot uk |
Electric slug fence
In article ,
" writes: It might not be permanent - it's only stopping slugs which are outside the perimeter. If the bed of earth/compost is on earth they might well come up from underneath - which is where they spend most of their time. I'm surprised that you've lost autumn crocus to slugs, mine have given the best show ever this year and we're certainly not short of slugs. These are new bulbs. They only arrived and were planted 3 weeks ago. The same bed is stuffed full of bluebells in spring, and the slugs/ snails never manage to make much of a dent in them, but they're well established. -- Andrew Gabriel [email address is not usable -- followup in the newsgroup] |
Electric slug fence
On Mon, 28 Sep 2009 18:37:01 +0100, bof wrote:
Can slugs swim? Wondering if a moat around the garden would achieve the same end but maybe have less maintenance requirements (given need for watering plants anyway)? Yes, they can swim, sort of. I dropped one in the toilet, which had made its way indoors through a hole in the wall. It managed to wiggle to the side and then climb up the porcelain. It held on tightly enough to resist flushing. Wrap 'em in toilet paper first, then flush, that sorts the buggers. Yeah, I'll just go and toilet-paper the slugs in my garden moat. My neighbours would love that. ;-) |
Electric slug fence
Stuart Noble wrote:
dennis@home wrote: You do all know that slugs won't cross a copper wire even if it is not connected to a PSU. I wouldn't bank on it Exactly. Wouldn't stop your Ninja Slug would it? -- Dave - The Medway Handyman www.medwayhandyman.co.uk |
Electric slug fence
Andrew Gabriel wrote:
In article . com, Jules writes: On Sun, 27 Sep 2009 09:20:26 +0000, Andrew Gabriel wrote: No slug damage this morning! Are there lots of electric slugs in your area? :-) Can slugs swim? Wondering if a moat around the garden would achieve the same end but maybe have less maintenance requirements (given need for watering plants anyway)? Yes, they can swim, sort of. I dropped one in the toilet, which had made its way indoors through a hole in the wall. It managed to wiggle to the side and then climb up the porcelain. It held on tightly enough to resist flushing. One of them highly trained Ninja Slugs. -- Dave - The Medway Handyman www.medwayhandyman.co.uk |
Electric slug fence
In message , Andrew Gabriel
writes Decided to make an electric slug fence yesterday, after my new autumn crocus shoots got eaten for the second night in a row. http://www.facebook.com/photo.php?pi...&id=1619546457 http://www.facebook.com/photo.php?pi...&id=1619546457 No slug damage this morning! My army of frogs seem to handle the slugs here -- geoff |
Electric slug fence
On Sep 28, 9:25 pm, larkim wrote:
On Sep 27, 11:53 pm, Matty F wrote: On Sep 27, 9:20 pm, (Andrew Gabriel) wrote: Decided to make an electric slug fence yesterday, after my new autumn crocus shoots got eaten for the second night in a row. http://www.facebook.com/photo.php?pi...17&id=16195464... No slug damage this morning! I was going to make a slug/snail electric fence for my new garden. I already have a 12 volt DC supply nearby so I was intending to run two bare copper wires about a quarter of an inch apart on the timber around the garden. After reading this I will put a resistor in the supply line! My wife will be interested in this. But please explain to me what the resistor is for? I'm sure my physics GCSE (grade B, 1988) will stretch to me actually understanding it, but I can't bring enough pre- existing knowledge to understand it on my own!! Also, why the LED? The resistor would be just to limit the current in case of a short, e.g. a whole pile of dead slugs across the wires!. I already have a fuse but I don't want that to blow or I could lose my garden overnight. According to the OP, only a very small current is enough to stop the slugs. |
Electric slug fence
On Mon, 28 Sep 2009 00:08:13 +0100, wrote:
On 27 Sep, Jules wrote: On Sun, 27 Sep 2009 09:20:26 +0000, Andrew Gabriel wrote: No slug damage this morning! Are there lots of electric slugs in your area? :-) Can slugs swim? Wondering if a moat around the garden would achieve the same end but maybe have less maintenance requirements (given need for watering plants anyway)? You need a good expense account for moats. I'm plauged with cats, crapping on the lawn. Any designs for electric cat fences? Prolly need 25v or more to give enough across the cojones to warn them off. 1000V should do it. Or buy a python. -- (\__/) M. (='.'=) Due to the amount of spam posted via googlegroups and (")_(") their inaction to the problem. I am blocking most articles posted from there. If you wish your postings to be seen by everyone you will need use a different method of posting. [Reply-to address valid until it is spammed.] |
Electric slug fence
In article ,
Matty F writes: On Sep 28, 9:25 pm, larkim wrote: My wife will be interested in this. But please explain to me what the resistor is for? I'm sure my physics GCSE (grade B, 1988) will stretch to me actually understanding it, but I can't bring enough pre- existing knowledge to understand it on my own!! Also, why the LED? The resistor would be just to limit the current in case of a short, e.g. a whole pile of dead slugs across the wires!. I already have a fuse but I don't want that to blow or I could lose my garden overnight. According to the OP, only a very small current is enough to stop the slugs. Yes. I didn't want to kill them, because a line of smoldering slugs around your flower bed doesn't look good, and they are food for things like hedgehogs. Also, I have an LED to let me know if there's any current leakage, and doubles up as a battery test. In the event of a slug arriving with a crowbar, I need to limit the LED current to 20mA to avoid damaging the LED. If you want to see if it's working, the LED flashes when a slug actually gets a belt. I also used it to test the effect of watering the area. Also as I mentioned before, I want to limit ground currents, as I don't know what effect it might have on other wild and domestic animals which roam around, and I have no wish to harm. I do know livestock is very seriously affected by leakage currents at levels you can't even feel, which is why you have to be very careful with earthing of electricity supplies on farms. -- Andrew Gabriel [email address is not usable -- followup in the newsgroup] |
Electric slug fence
geoff wrote:
In message , Andrew Gabriel writes Decided to make an electric slug fence yesterday, after my new autumn crocus shoots got eaten for the second night in a row. http://www.facebook.com/photo.php?pi...&id=1619546457 http://www.facebook.com/photo.php?pi...&id=1619546457 No slug damage this morning! My army of frogs seem to handle the slugs here Ninja frogs? -- Dave - The Medway Handyman www.medwayhandyman.co.uk |
Electric slug fence
Pete C wrote:
wrote: On 27 Sep, 11:03, (Andrew Gabriel) wrote: In article , Colin Wilson o.uk writes: Decided to make an electric slug fence yesterday, after my new autumn crocus shoots got eaten for the second night in a row. http://www.facebook.com/photo.php?pi...&id=1619546457 http://www.facebook.com/photo.php?pi...&id=1619546457 No slug damage this morning! Martin, any chance of a wiring diag, and source of capping? :) Why do you need a circuit diagram? It is described in the thread in words. Capping could be made from standard top hat section electrical wiring protector. Bob |
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