Ultrasonic insect repellents for repelling insects, rodents, birds and even large animals have been around for a long time, but their effectiveness depends on who you ask. Some small animals seem to be unaffected, while others will definitely avoid being around such equipment. Deploying some of these devices to scare away animals seems to work well for [Ondřej Petrlík]. Where he lives, the tall grass needs to be trimmed in spring. Unfortunately, the tall grass is very suitable for young newborn animals to hide and be safe. Lawn mowers often maimed and injure these animals. [Ondřej] is eager to solve the problem and prevent these accidents from happening.
He built an electronic repellent on a farm/ranch/ranch in the Czech Republic to prevent entry of wild animals and their cubs. He uses the Arduino Mini to drive a large piezoelectric transducer to scare away wild animals near the device. He may have used a sufficiently high frequency beyond the human range, but when he releases his code and details, we will know more. There are also some large 10mm LEDs-either used for visual positioning devices or using ultrasound to help drive animals away. LDR can activate the LEDs at night. Using the Arduino helps to turn on the transducer at random intervals, hopefully it uses a series of different frequencies so that the animal is not immune to the device.
His first prototype was pieced together with vanilla, ready-made parts. An Arduino, a boost converter, an LDR, several LEDs, a reed switch powered by a magnet, and a large ultrasonic transducer, all powered by three alkaline AA batteries. He stuffed it all into a weatherproof molded case and glued them together with a lot of hot glue. This does not make it very strong for long-term outdoor use. Although the prototype worked well, he needed to place several equipment around his farm. To simplify assembly and make it more reliable, he designed a custom PCB to install in a weatherproof enclosure. This allows him to easily install all the necessary parts for more reliable results. His project is still in progress, so if you have used these types of ultrasonic insect repellents to drive animals, and have any insights that might be helpful to him, please add your comment. [Ondřej] seems very satisfied with the current results.
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How much power is needed to adequately cover such a large area?
Maybe the method should involve making a "robot" (RC vehicle) that can race around the area for a period of time, instead of trying to make a huge system that covers all areas? Because yes, to increase efficiency, it requires a lot of power, but things around making noise can make anyone/a person nervous and want to leave
I also have this idea. But the goal of this project is to design and manufacture simple and inexpensive equipment. Someone could lose, damage or steal the device. So the new cost should not be too high.
They were also installed on site only a few days before cutting.
Great project. When I tried to photograph deer, I noticed that they might be able to barely see the infrared light used in cheap night vision equipment. My grandfather had a similar problem when trying to track the deer in his house. He used It’s a cheap wildlife camera. I can’t understand how many deer he has photographed. Compared with dozens of sightings a day, it’s common to wake up in the garden to see a group of deer, but there are 3 cameras on the ordinary deer road. , He may only get a single deer shot all night.
Can he use PIR to trigger the camera?
In addition to sound, flashes and transducers may help scare away animals in low-light environments.
I think I would prefer to use OpenCV to implement a motion detection and tracking system, which sprays a liter of water from a laminar nozzle to the animal.
Including fast flash and long light to simulate car headlights.
"Car Light" I thought he wanted the deer to leave instead of standing still and staring. B^)
Good point, it lights up for a while (~10 seconds). The light is not so strong, you can't keep staring at it. I heard that they were afraid of cars because they were shot and killed by some cars. So they don't like lights. This is not a legal hunt, but it is happening.
Motion sensor and rain bird sprinkler, suitable for very small areas.
Ah...deer. There are no predators besides cars near us. As David Carmen said, "a mouse with antlers".
The most delicious deer are grown locally and fed hosta.
Well, this is what happens when we drive away natural enemies... You don't want them to be near our home anyway, because they are wolves and bears: P
At that time, there were no problems with Jehovah's Witnesses. :-)
If the noise is not enough, you can choose any rap song, and then increase the octave to the level that we can't hear. Play it over and over again-it's enough to drive away the tortoise.
I don't know Czech deer, but the hearing range of North American white-tailed deer is as high as 30 kHz, but tuning to the range of 2-8 kHz is roughly equivalent to our own hearing. Therefore, although they can hear ultrasound, they cannot hear it very well, so the range will not be very large. Coupled with the possible impact on non-target species, this is a rule for me. However, something more shocking and easier to hear like human speech may be good, some random human speech gibberish, such as those spoken by neural networks... or spray as suggested by others. Water fire extinguishing system.
> Random vocal gibberish
Imagine encountering that at night without knowing the source.
When seeing eyes like 10mm LEDs, damn it.
Maybe the radio can do this...soldered on a motion sensing circuit, or a timer.
Well, now you remind me of those "radar" sensors from a few days ago. It would be great to put something in my garden to scare away raccoons and cats.
Cats are just cute animals, why should anyone scare them? I don't have any experience with raccoons.
The cat is shit in my garden! :P The raccoon eats the corn the week before you are ready to harvest it! *complain*
> Random vocal gibberish
Hello, this is Ondřej. It does not use the ultrasonic range, and the sound range of the repellent is between 200Hz and 15kHz, so humans can also hear it. Currently, I use three pre-arranged different sounds randomly selected, and their repetition times are also random in the range of 1-5.
The code is almost complete, and I plan to release it soon.
In other words, these devices are already in use, but I have to edit the code and add comments to make it more readable for everyone.
I met an old guy selling handmade deer whistle in the north, and his whistle is really effective. Two models are sold, 3 or 4 wooden whistle, each whistle installed together, the frequency is slightly different.
The sound of one frequency bounces differently from another. As the car moved, the deer heard from there, then changed to this side, and then suddenly came from directly behind! When the obvious source of sound jumps in front of you, the deer will run wild in front of you!
Several frequencies together will certainly bounce more from multiple different directions, but the loudest single source is obviously the mixed frequency from the front bumper of the car. The deer kept moving away from it. You can notice that you are standing on the side of the road to test.
Although the wood rots after many years, you can make them by buying several different models or changing the volume of the cavity with some epoxy resin.
The test is good. There was a highway in the north at 4 in the morning. Deer was as thick as a mosquito... used to travel 35 miles at 25 mph. With three or four good whistles, 55 is good again. It is compulsory to use motorcycles at night.
tip. Take it down during the day...otherwise, when you cruise around the town, everyone in the town will stare at you.
Ah... If a whistle has only two tones when it fails due to moths or bugs, it will lose a lot of effectiveness, so it is recommended to use 4 to achieve single-shot fault tolerance.
For this application, the desired effect sweep or frequency hopping should be added.
So, can you install them backwards to attract deer during the hunting season? B^)
See Steve Gibson (GRC Gibson Research) "Portable Dog Killer" or Treble-Maker or Quiet Canine (Google works well) https://www.grc.com/tqc/thequietcanine.htm Also safe now broadcast 281, 248 and 592
"Hopefully he uses a series of different frequencies so that animals are not immune to the equipment."
You must use the rolling frequency, otherwise the deer will quickly adapt and absorb you.
Vegetables today, the world tomorrow!
firecracker. When I lived in Honolulu a few years ago, you could buy a roll of 100,000 rolls at Costco for less than $20. If deployed properly, this will scare away many small animals.
If the firecrackers fail to function, forest fires will truly restore these critters.
Well, as a resident of Pennsylvania, this is very attractive to me.
The United States, which ranks first in the absolute number of car/deer collisions (a significant lead), ranks second in the relative probability of deer/deer collisions. Within a year, there were two deer killed by the road on my lawn. One service of the tax rebate is a special "dead deer" removal service.
http://www.grandviewoutdoors.com/big-game-hunting/deer-car-collisions-ranked-by-state/
https://www.dot.state.pa.us/penndot/districts/district10.nsf/e4ac5d2f8fa912a185256c62004afe7c/b8fa19884f4f35bc8525783f006063dc?OpenDocument
I hope so. Unless you plan to eat them, things will get stinky very quickly, let alone attract unwanted predators.
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