I smell bullshit. - Page 1
Forum section: electronics / general

author: retrotubeguy
author_rank: Contributor
timestamp: September 14, 2015, 03:30:15 am
content: 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.htmlWhats your opinion.

author: Mechanical Menace
author_rank: Super Contributor
timestamp: September 14, 2015, 03:34:45 am
content: Don't know if it's bs or not but 400Hz-1000Hz isn't ultra or infrasound. It's at least mislabelled lol

author: Mr.B
author_rank: Unknown
timestamp: September 14, 2015, 03:50:27 am
content: Smells liketo me...Two YT clips claiming that they are useless...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

author: pickle9000
author_rank: Super Contributor
timestamp: September 14, 2015, 04:21:32 am
content: Snakes do react to ground vibrations (footsteps) but only to avoid being squashed. They follow smells (food).Total BS.

author: tautech
author_rank: Super Contributor
timestamp: September 14, 2015, 04:36:52 am
content: I'm told shotgun frequencies work well.

author: retrotubeguy
author_rank: Contributor
timestamp: September 14, 2015, 05:56:00 am
content: :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.

author: Richard Head
author_rank: Frequent Contributor
timestamp: September 14, 2015, 06:04:55 am
content: It sounds like a good product for Dave to do a test on, including live poisonous snakes.I can't wait for the video.

author: pickle9000
author_rank: Super Contributor
timestamp: September 14, 2015, 06:33:21 am
content: Quote from: retrotubeguy on September 14, 2015, 05:56:00 amLive next to a pile driver.

author: forrestc
author_rank: Unknown
timestamp: September 14, 2015, 07:14:39 am
content: Quote from: Richard Head onTodayat 04:04:55 PMOh there's no poisonous snakes in Australia....http://web.archive.org/web/20150111055930/http://www.avru.org/?q=general/general_mostvenom.htmlSo I'm not sure where he'd find suitable snakes.

author: Mechanical Menace
author_rank: Super Contributor
timestamp: September 14, 2015, 07:35:53 am
content: 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.

author: continuo
author_rank: Frequent Contributor
timestamp: September 14, 2015, 07:38:18 am
content: Quote from: Richard Head on September 14, 2015, 06:04:55 amYeah, let's call it "Snakes In A Lab"In Germany they sell these things as mole repellers, doesn't work eitherhttp://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_

author: G7PSK
author_rank: Super Contributor
timestamp: September 14, 2015, 07:41:03 am
content: Quote from: Mr.B on September 14, 2015, 03:50:27 amJust proves how effective they are.

author: John Coloccia
author_rank: Super Contributor
timestamp: September 14, 2015, 09:39:57 am
content: I'm saving up for the audiophile version.

author: SL4P
author_rank: Super Contributor
timestamp: September 14, 2015, 11:22:00 am
content: My problem, as an Aussie - is that I haven't yet encountered any ultrasonic snakes anywhere in the eastern states...

author: VK5RC
author_rank: Unknown
timestamp: September 14, 2015, 11:31:59 am
content: 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.

author: SeanB
author_rank: Super Contributor
timestamp: September 14, 2015, 06:31:07 pm
content: 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_mambahttps://en.wikipedia.org/wiki/Category:Snakes_of_Africa

author: rsjsouza
author_rank: Super Contributor
timestamp: September 14, 2015, 07:00:08 pm
content: Quote from: SeanB on September 14, 2015, 06:31:07 pm(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.

author: SeanB
author_rank: Super Contributor
timestamp: September 14, 2015, 07:05:28 pm
content: Pretty much like every snake here that is more or less green is called Mambaaaaaaa, followed by the incredible vanishing act.

author: rsjsouza
author_rank: Super Contributor
timestamp: September 15, 2015, 01:17:07 am
content: Quote from: SeanB on September 14, 2015, 07:05:28 pm

author: John Coloccia
author_rank: Super Contributor
timestamp: September 15, 2015, 01:21:49 am
content: 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.

author: pickle9000
author_rank: Super Contributor
timestamp: September 15, 2015, 01:39:08 am
content: Quote from: John Coloccia on September 15, 2015, 01:21:49 amBaiting is effective, gotta eat.

author: gyrfalcon16
author_rank: Contributor
timestamp: September 15, 2015, 01:50:51 am
content: 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!

author: vk6zgo
author_rank: Super Contributor
timestamp: September 15, 2015, 06:04:22 am
content: Quote from: Mechanical Menace on September 14, 2015, 07:35:53 amThe upside is,we don't have any land animals that caneatyou,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".

author: Red Squirrel
author_rank: Super Contributor
timestamp: September 15, 2015, 06:16:38 am
content: 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.They probably mean 1000khz right?

author: pickle9000
author_rank: Super Contributor
timestamp: September 15, 2015, 06:31:19 am
content: Quote from: vk6zgo on September 15, 2015, 06:04:22 amI have bears in the back yard all the time (every couple weeks). Not really a problem but better viewed from inside the house.

author: Mechanical Menace
author_rank: Super Contributor
timestamp: September 15, 2015, 06:32:27 am
content: Quote from: vk6zgo on September 15, 2015, 06:04:22 amDingoes? And the bigger goannas have got to be able to give it a good go even if they haven't yet lol

author: vk6zgo
author_rank: Super Contributor
timestamp: September 15, 2015, 07:17:36 am
content: Quote from: Mechanical Menace on September 15, 2015, 06:32:27 amDingoes 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 eatthem!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.

author: VK5RC
author_rank: Unknown
timestamp: September 15, 2015, 11:14:57 am
content: 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.

author: isaiahA
author_rank: Contributor
timestamp: September 15, 2015, 10:42:21 pm
content: QuoteFUNNY

author: retrotubeguy
author_rank: Contributor
timestamp: September 16, 2015, 12:26:36 am
content: 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.

author: Red Squirrel
author_rank: Super Contributor
timestamp: September 16, 2015, 05:47:14 am
content: 15khz seems to be the magic number to call my cat.Reminds me of the sound of a CRT TV.

author: Mr.B
author_rank: Unknown
timestamp: September 16, 2015, 07:47:49 am
content: Quote from: Red Squirrel on September 16, 2015, 05:47:14 am3hz 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.

author: retrotubeguy
author_rank: Contributor
timestamp: September 16, 2015, 08:48:12 am
content: I was being serious.

author: SeanB
author_rank: Super Contributor
timestamp: September 16, 2015, 07:51:11 pm
content: 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.

author: PlainName
author_rank: Super Contributor
timestamp: September 17, 2015, 08:19:30 am
content: 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 catThis one has a bright(ish) LED too which flashes, but I am unconvinced that the LED alone causes them to have second thoughts.

author: Mechanical Menace
author_rank: Super Contributor
timestamp: September 17, 2015, 10:27:19 am
content: Quote from: dunkemhigh on September 17, 2015, 08:19:30 amI'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 :/

author: PlainName
author_rank: Super Contributor
timestamp: September 17, 2015, 12:08:23 pm
content: 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

author: Mechanical Menace
author_rank: Super Contributor
timestamp: September 17, 2015, 12:23:42 pm
content: Quote from: dunkemhigh on September 17, 2015, 12:08:23 pmUnfortunately 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.

author: jlmoon
author_rank: Unknown
timestamp: September 17, 2015, 04:30:01 pm
content: Quote from: tautech on September 14, 2015, 04:36:52 am