EEVblog Electronics Community Forum
General => General Technical Chat => Topic started by: retrotubeguy on September 14, 2015, 03:30:15 am
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:bullshit: Can you smell it too. Ultrasonic snake repellent. http://www.crazysales.com.au/online-set-of-4-solar-powered-snake-repellent-with-battery-case-91513.html (http://www.crazysales.com.au/online-set-of-4-solar-powered-snake-repellent-with-battery-case-91513.html)
Whats your opinion. :bullshit: :wtf:
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Don't know if it's bs or not but 400Hz-1000Hz isn't ultra or infrasound. It's at least mislabelled lol
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Smells like :bullshit: to me...
Two YT clips claiming that they are useless...
https://www.youtube.com/watch?v=zTtzbmUjibU (https://www.youtube.com/watch?v=zTtzbmUjibU)
https://www.youtube.com/watch?v=KyxD3YizWlM (https://www.youtube.com/watch?v=KyxD3YizWlM)
Funny.
They are being advertised on a dot NZ website... We don't have snakes here.
http://www.bestdeals.co.nz/buy-home-garden/pest-control?aid=1&gclid=Cj0KEQjwvdSvBRDahavi3KPGrvUBEiQATZ9v0FWRjD2MbW1Hcv8MKlWZVvxvgVIVeSkTU6rfOp4qiq0aAkub8P8HAQ (http://www.bestdeals.co.nz/buy-home-garden/pest-control?aid=1&gclid=Cj0KEQjwvdSvBRDahavi3KPGrvUBEiQATZ9v0FWRjD2MbW1Hcv8MKlWZVvxvgVIVeSkTU6rfOp4qiq0aAkub8P8HAQ)
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Snakes do react to ground vibrations (footsteps) but only to avoid being squashed. They follow smells (food).
Total BS.
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I'm told shotgun frequencies work well. >:D
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:palm:You would need to to produce low frequency rumble bursts to simulate vehicle's, human traffic and other large animals. how frequent the bursts would need to be is any ones guess. I assume that if the signal where constant the snake would simply figure out that its a normal thing for that area and then go about it's business eventually.Maybe a scientist can chime inhere. In any case it would take more than a small solar charged battery and a crappy buzzer to have any effect at all. The amount of power you would need to generate for a product that could do this would likely be the size of a ride on lawn mower not a solar garden light. The transducer alone would cost a fortune. May be the smell of bullshit dripping from this thing is what is supposed to keep them away. |O
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It sounds like a good product for Dave to do a test on, including live poisonous snakes.
I can't wait for the video. :popcorn:
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:palm:You would need to to produce low frequency rumble bursts to simulate vehicle's, human traffic and other large animals. how frequent the bursts would need to be is any ones guess. I assume that if the signal where constant the snake would simply figure out that its a normal thing for that area and then go about it's business eventually.Maybe a scientist can chime inhere. In any case it would take more than a small solar charged battery and a crappy buzzer to have any effect at all. The amount of power you would need to generate for a product that could do this would likely be the size of a ride on lawn mower not a solar garden light. The transducer alone would cost a fortune. May be the smell of bullshit dripping from this thing is what is supposed to keep them away. |O
Live next to a pile driver.
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Quote from: Richard Head on Today at 04:04:55 PM (https://www.eevblog.com/forum/index.php?topic=55114.msg754275#msg754275)
It sounds like a good product for Dave to do a test on, including live poisonous snakes.
I can't wait for the video. :popcorn:
Oh there's no poisonous snakes in Australia.... http://web.archive.org/web/20150111055930/http://www.avru.org/?q=general/general_mostvenom.html (http://web.archive.org/web/20150111055930/http://www.avru.org/?q=general/general_mostvenom.html) ;) So I'm not sure where he'd find suitable snakes.
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I thought there was one type of sea snake that was indeed poisonous? If there is it would surprise me if they don't also live in Australia. The country really doesn't seem to want people living there lol.
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It sounds like a good product for Dave to do a test on, including live poisonous snakes.
I can't wait for the video. :popcorn:
Yeah, let's call it "Snakes In A Lab" :-DD
In Germany they sell these things as mole repellers, doesn't work either ;D
http://www.amazon.de/Hartig-Helling-MV-250-NiMH-Akkupack/dp/B0010X7M6G/ref=pd_sim_sbs_86_1?ie=UTF8&refRID=099H5NC0QAJ8RH1Y6RQF&dpSrc=sims&preST=_AC_UL160_SR160%2C160_ (http://www.amazon.de/Hartig-Helling-MV-250-NiMH-Akkupack/dp/B0010X7M6G/ref=pd_sim_sbs_86_1?ie=UTF8&refRID=099H5NC0QAJ8RH1Y6RQF&dpSrc=sims&preST=_AC_UL160_SR160%2C160_)
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Smells like :bullshit: to me...
Two YT clips claiming that they are useless...
https://www.youtube.com/watch?v=zTtzbmUjibU (https://www.youtube.com/watch?v=zTtzbmUjibU)
https://www.youtube.com/watch?v=KyxD3YizWlM (https://www.youtube.com/watch?v=KyxD3YizWlM)
Funny.
They are being advertised on a dot NZ website... We don't have snakes here.
http://www.bestdeals.co.nz/buy-home-garden/pest-control?aid=1&gclid=Cj0KEQjwvdSvBRDahavi3KPGrvUBEiQATZ9v0FWRjD2MbW1Hcv8MKlWZVvxvgVIVeSkTU6rfOp4qiq0aAkub8P8HAQ (http://www.bestdeals.co.nz/buy-home-garden/pest-control?aid=1&gclid=Cj0KEQjwvdSvBRDahavi3KPGrvUBEiQATZ9v0FWRjD2MbW1Hcv8MKlWZVvxvgVIVeSkTU6rfOp4qiq0aAkub8P8HAQ)
Just proves how effective they are. :-DD :-DD
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I'm saving up for the audiophile version.
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My problem, as an Aussie - is that I haven't yet encountered any ultrasonic snakes anywhere in the eastern states...
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I've read about snakes and infra-sound but I suspect if the stimulus is repetitive the snakes would learn to ignore it. At my parents house the Common/Eastern Brown snakes (nasty venom+++ but not good biters) always hung around any ponds etc (in a quite dry bushland setting) I suspect for the water and any frogs etc.
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Aren't I lucky that there are only a few poisonous snakes around me, mostly black mamba and cobras. Add to that puffadders and boomslang and you have a good collection. they collect 1-2m long ones regularly from houses, as it is now the breeding season and they move around looking for rats and other small wildlife.
https://en.wikipedia.org/wiki/Black_mamba
https://en.wikipedia.org/wiki/Category:Snakes_of_Africa
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Aren't I lucky that there are only a few poisonous snakes around me, mostly black mamba and cobras.
(off-topic) To me it is always funny to hear the word "cobra" tied to a single type of snake. In my mother language (Portuguese), "cobra" equals "snake". Any kind.
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Pretty much like every snake here that is more or less green is called Mambaaaaaaa, followed by the incredible vanishing act.
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Pretty much like every snake here that is more or less green is called Mambaaaaaaa, followed by the incredible vanishing act.
:-DD
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After reading this thread, I did a bit of research, just out of curiosity. I'm actually kind of surprised that none of the repellents, whatever the kind, seem to work. I thought some of the better ones would actually be effective. Makes me wonder if at least some of them are trying the best and it's just a difficult problem, or if they all know they're ineffective and are just ripping people off.
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After reading this thread, I did a bit of research, just out of curiosity. I'm actually kind of surprised that none of the repellents, whatever the kind, seem to work. I thought some of the better ones would actually be effective. Makes me wonder if at least some of them are trying the best and it's just a difficult problem, or if they all know they're ineffective and are just ripping people off.
Baiting is effective, gotta eat.
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Why did you just make me watch a boring video of a guy cutting a perfectly good drainage tile and sticking a hose in it? I didn't see any damn snakes!
I think the real test would go down to your local Petco, plug one of these ultra sonic energy wasters into an outlet and film the chaos it causes!
:-DD
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I thought there was one type of sea snake that was indeed poisonous? If there is it would surprise me if they don't also live in Australia. The country really doesn't seem to want people living there lol.
The upside is,we don't have any land animals that can eat you,like many other countries do,although feral pigs might have a good try!
Crocs don't go far from water,so aren't "land animals".
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Isin't that kinda low frequency? Anything below 20khz and you can hear it. At 1000hz it's going to sound like a telecom test tone throughout the yard. :-DD They probably mean 1000khz right?
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I thought there was one type of sea snake that was indeed poisonous? If there is it would surprise me if they don't also live in Australia. The country really doesn't seem to want people living there lol.
The upside is,we don't have any land animals that can eat you,like many other countries do,although feral pigs might have a good try!
Crocs don't go far from water,so aren't "land animals".
I have bears in the back yard all the time (every couple weeks). Not really a problem but better viewed from inside the house.
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The upside is,we don't have any land animals that can eat you,like many other countries do,although feral pigs might have a good try!
Dingoes? And the bigger goannas have got to be able to give it a good go even if they haven't yet lol
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The upside is,we don't have any land animals that can eat you,like many other countries do,although feral pigs might have a good try!
Dingoes? And the bigger goannas have got to be able to give it a good go even if they haven't yet lol
Dingoes are basically just average sized dogs-----ancient ones for sure,but dogs!
They might eat a very small child,but adult humans are quite large animals!
Goannas do get pretty big,but again,adults would be too much for them---people still eat them!
Komodo dragons in Indonesia could eat you,though!
Dangerous animals that won't eat you,but could do you serious harm are feral water buffaloes,some of the "domestic" cattle that run free for a lot of their life up in the North.
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THE most dangerous creature is the two legged hominid, really nasty esp if drinks fermented fruit juice, found on very continent!!!!!
Edit; Just realise I am quoting Sir D Attenborough on response to the world's most dangerous creature.
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I think the real test would go down to your local Petco, plug one of these ultra sonic energy wasters into an outlet and film the chaos it causes!
:-DD
:-DD :-DD :-DD :-DD :-DD :-DD :-+ FUNNY
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Ultrasonic does not seem to have any effect on most land animals. At a previous company I worked at, we did some research on this kind of thing. We found that higher frequencies in the human audio spectrum had the most effect. we used around 16Khz with a high powered Mosfet amp and a heavy duty high quality sensitive transducer and fired random pulses at mice and other animals that I won't mention. They did not like it at all. In-fact mice would just twitch vigorously and push them selves into the corner of the cage. Eventually the mice all died, I assume from stress. Yes we fed and watered them. :-X
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15khz seems to be the magic number to call my cat. :-DD Reminds me of the sound of a CRT TV.
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15khz seems to be the magic number to call my cat. :-DD Reminds me of the sound of a CRT TV.
3hz is the magic number for our cats.
Banging a teaspoon on the can of catfood at roughly 3 times a second while standing on the front doorstep calling "Sully", "Gadget", seems to work every night.
:)
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I was being serious. :-DD
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Ultrasonics does not work, plugged one in in the garage, and the roaches were still there. Then did the proper way and scattered 2kg of borax over the floor and the next day dead roaches all over. Ultrasonics are effective, but you need 1kW of power into the piezo speaker array ( and this is 1kW at 20-60kHz swept tone, not into a crossover that will dump most as heat), and at that level it will boil you in any case.
In any case, no bears here, though the Vervet monkeys ( especially the teenagers with the blue dangly bits), are a pain, coming in through any open window that is not guarded well, and stealing fruit, opening cupboards and making a mess all over. They pee and poo all over as well, especially if surprised. They do not like a can of spray oil at all.
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I bought an ultrasonic cat repeller from Amazon for scaring off foxes. I've seen 'em on CCTV trundling through the garden and then making backtracks quickly when they come across this thing and it goes off. Same with next door's cat :)
This one has a bright(ish) LED too which flashes, but I am unconvinced that the LED alone causes them to have second thoughts.
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This one has a bright(ish) LED too which flashes, but I am unconvinced that the LED alone causes them to have second thoughts.
I'm glad I'm not your neighbour. Those things drive me nuts. Hurt actually. You'd probably end up passing footage of me smashing the thing up at 2 am to the police :/
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If you were my neighbour you'd be too far away to notice. And you'd probably be about 14 on account of having stupendous hearing ability, still :)
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And you'd probably be about 14 on account of having stupendous hearing ability, still :)
Unfortunately not. But yeah my hearing is ridiculous for my age but these things also only operate at 20-24khz so it's not that rare for adults to be able to pick them up. Also well within many an animals hearing range and not just cats no matter the lies the RSPB tell about them lol. 60-79khz would be a better range, no chance of it effecting people and wouldn't effect dogs either.
Those "mosquito" child repellents are worse though. Not as painful but unrelenting.
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I'm told shotgun frequencies work well. >:D
:-DD :-+