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ultra sonic transducers
Posted by
pete g
on 07 Apr, 2024 19:56
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if i was going to hook up one transducer would there be any polarity concerns?
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#1 Reply
Posted by
Zero999
on 07 Apr, 2024 19:58
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It depends, but my crystal ball has gone a little cloudy.
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#2 Reply
Posted by
woofy
on 07 Apr, 2024 20:20
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Plastic transducer, no problem.
Metal transducer, depends:
Check the case to the pins with a multimeter. If none are connected, no problem.
If one pin is connected, make sure it is grounded if the circuit allows or at least isolated.
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#3 Reply
Posted by
pete g
on 10 Apr, 2024 00:17
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hi, thanks for responses. how would you hook up two or more in parallel?
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#4 Reply
Posted by
Zero999
on 10 Apr, 2024 07:02
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hi, thanks for responses. how would you hook up two or more in parallel?
You don't.
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#5 Reply
Posted by
Gyro
on 10 Apr, 2024 08:26
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As soon as you start putting transducers side by side, you start introducing interference patterns - peaks and nulls. That is almost certainly what you don't want.
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#6 Reply
Posted by
pete g
on 14 Apr, 2024 15:52
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hi, thanks for your responses. i have a problem. nearby dog barking. i'am looking for you ee's out there for a dog bark repeller. it needs to transmit an ultra sonic signal 75 to 100 feet. dog bark repellers are legal in my state so there is no liability issues. if someone will design the circuit i can build it. please help.
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Before you put any effort into building this thing, do you have any evidence that ultra sonic sounds suppress dog barking? I know that dogs bark in response to hearing other dogs bark, and to unusual noises. My knee jerk opinion would be that an ultrasonic noise would start dogs bothering rather than stop them.
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#8 Reply
Posted by
Zero999
on 14 Apr, 2024 16:40
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hi, thanks for your responses. i have a problem. nearby dog barking. i'am looking for you ee's out there for a dog bark repeller. it needs to transmit an ultra sonic signal 75 to 100 feet. dog bark repellers are legal in my state so there is no liability issues. if someone will design the circuit i can build it. please help.
You didn't say you wanted an ultrasound generator. Most people thought you wanted an ultrasonic microphone.
Please provide more information.
This is your last chance. More vague nonsense and you go on my ignore list.
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#9 Reply
Posted by
pete g
on 14 Apr, 2024 17:33
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sorry for my ineptitude. i need a ultrsonic transmitter (25khz) to project into my neighbors yard. approx. 75 to 100ft at a level the dogs can hear. ultra sonic conditioning of dog barking works. i suppose you would need an oscillator feeding into a high power ultra sonic amplifier and then a means of transmitting same. if i can provide more detail plz let me know.
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#10 Reply
Posted by
pete g
on 20 Apr, 2024 01:09
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still too vague?
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you should try civil discourse instead of trying to make nutty contraptions
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#12 Reply
Posted by
Zero999
on 20 Apr, 2024 13:08
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#13 Reply
Posted by
pete g
on 20 Apr, 2024 18:22
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well, i think i should be the one to determine if civil discourse is an option. whats so nutty about the device i propose to stop the barking?
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#14 Reply
Posted by
pete g
on 20 Apr, 2024 18:25
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well, i had thought it might be nice to make one . and so, i appealed to the forum members to help out, there is certainly more expertise on this forum, that making the device i propose is entirely feasable.
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#15 Reply
Posted by
Zero999
on 20 Apr, 2024 18:33
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1) Plenty of people here are unconvinced about the efficacy of ultrasound at stopping a dog barking. The idea appears to be a crazy one to many,
2) It's possible to build one but why? It's cheaper to buy one and if it doesn't work, it's likely you'll be able to return it, for no more than the price of postage. This is more of a professional engineering forum, than a hobbyist one. If the best solution is to buy off the shelf, then that's the advice you'll get.
If you must go DIY, go for a tweeter, audio amplifier, a digital signal synthesis IC and microcontroller.
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#16 Reply
Posted by
EPAIII
on 20 Apr, 2024 21:55
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Have you considered an alligator for a pet? A friend of mine did that for exactly the same reason. Except he had TWO neighboring dogs which barked all the time.
I bet that dog would be the first to go.
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#17 Reply
Posted by
pete g
on 20 Apr, 2024 23:02
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didn't know about the professional, hobbiest bit. so thanks to all. i'll try elswhere.
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#18 Reply
Posted by
Zero999
on 21 Apr, 2024 10:17
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I would also suggest that you need to supply the non electronics expertise needed. Can't suggest transducers without knowing what power level is needed, which in turn requires knowing how loud the sound needs to be.
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#20 Reply
Posted by
pete g
on 21 Apr, 2024 15:22
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totally agree with the advice given. will look into buying one. the only problem being, none of the commercial ones have the range i need.
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#21 Reply
Posted by
Zero999
on 21 Apr, 2024 16:05
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#22 Reply
Posted by
pete g
on 21 Apr, 2024 16:18
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yes, there could be a danger. but, being 87 i do need my sleep.
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#23 Reply
Posted by
PlainName
on 22 Apr, 2024 16:30
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Perhaps an alternative solution would be to find something that encourages the dog to bark. Sooner or later it will get hoarse, or the owners will be thoroughly pissed off with it (it is closer to them than you... inverse law...). Perhaps some clever control to start the encouragement the moment it stops barking and just wear the thing out.
Or... get a cockerel. Two might be better since they will be in competition, although that works best if you have hens too. But think of the eggs for breakfast!
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#24 Reply
Posted by
SeanB
on 22 Apr, 2024 17:51
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Easiest is piezo tweeters, though you will need a few placed in an array, with a driver able to drive the 20uF or so of capacitive load they will present. Easy to assemble, and they do have a response out to around 30kHz, though your drive voltage is limited to around 30V or so. 7in by 3in ones are common for disco use, and cheap to buy for under $10.