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49352

Re: Sonar Anomoly

... Forgot to mention, there are also numerous similar devices intended to repel rats and mice:
phoneguin
9:03 PM
#49352
 
49351

Re: Sonar Anomoly

... There is actually a device manufactured for the purpose of deterring loitering by teenagers that emits this annoying frequency called the Mosquito:
phoneguin
8:57 PM
#49351
 
49350

Re: Sonar Anomoly

... Cool! I wonder what the relative power is of the sonars vs. a bat? I was thinking, the mics I have leftover from the network-over-sound projects did pick
Pat Tressel
7:04 PM
#49350
 
49349

Re: Sonar Anomoly

FWIW, there's a pretty simple (and tunable) bat detector article in Nuts&Volts June 2011, page 30. It uses a single LM324 plus a piezo beeper as the
Charlie H
6:42 PM
#49349
 
49348

Re: Sonar Anomoly

While not sonar related, I had problems with my Lego sumo bots getting their program wiped out at a competition, while they worked perfectly at home. I
Dave Hylands
4:56 PM
#49348
 
49347

Re: Sonar Anomoly

Ah, thanks Mike. ... -- Sent From Blake's Linux Desktop
Blake Raymond
12:41 PM
#49347
 
49346

Re: Sonar Anomoly

Our Robotics Society of Southern California club motto is "It worked at home!" 😃 Dr. Bruce.
Bruce J Weimer MD
10:36 AM
#49346
 
49345

Re: Sonar Anomoly

Well, the theory is that something is either jamming the digital signal from the sonar modules, creating blocking or conflicting signals to the ultrasonic
KM6VV
10:01 AM
#49345
 
49344

Re: Sonar Anomoly

Blake, there could be many reasons, by them selves or in combination, and part of the lively discussion is that everyone has their own opinion as to which is
mike_partain
9:31 AM
#49344
 
49343

Re: Sonar Anomoly

Ok, please excuse my ignorance, but I'm not very familiar with signals and robots. Why would a sonar array such as Carol's stop working on one room, and as
Blake Raymond
8:39 AM
#49343
 
49342

Re: Sonar Anomoly

I seem to remember our tabletop robots having some problems in our google meting room (HBRobotics) as well. Maybe it would be worthwhile snooping with RF field
KM6VV
8:36 AM
#49342
 
49341

OFF TOPIC event.

it's not robotics, but I'm hosting a Cards Against Humanity event (but some of the cards mention robots!). I'll have a lot of interesting folks there (about
John Schlick
8:04 AM
#49341
 
49340

Re: Sonar Anomoly

Carol, et al. -- ... A student in the embedded systems class at UW Bothell last term told me today, when I mentioned the sonar problem you'd encountered, that
Pat Tressel
Apr 27
#49340
 
49339

Re: Letter to Mr. Buckley

Well said Carol. I also apologize to those who do not like the bickering, however I caution, that is what it appears to me as the internet was created for. I
mike_partain
Apr 27
#49339
 
49338

Letter to Mr. Buckley

Mr. Buckley, Our group, the Seattle Robotics Society is dedicated to spreading knowledge about robotics. We welcome anybody of any age, whether they are an
carolhazlett
Apr 26
#49338
 
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