 |
 | Home | Contact Us | FAQ | Search & Site Map | Link to Us |
 | Sign In | Join | Other 45 Sites in Network |
| HomeDiscussion Groups General ModelsRailroadsRocketsRadio Controlled Air ModelsHelicoptersLand ModelsWater ModelsModelGeeks.com Contact UsLink To UsSearch & Site Map |
Model Forum / General / Rockets / February 2009Rocket beeper
Hi, check this video of the rocket beeper: http://www.youtube.com/watch?v=OqqlMNDbZ6E > Hi, > > check this video of the rocket beeper: > > http://www.youtube.com/watch?v=OqqlMNDbZ6E OK......... No price, No ordering info, I don't speak Slovak, Survey says - -pass >> Hi, >> [quoted text clipped - 11 lines] > > Survey says - -pass Actally it's Slovene not Slovak :) There is no price since this item will be sold through distributors, which have already contacted us. I was expecting any technical comment :) >>> Hi, >>> [quoted text clipped - 18 lines] > > I was expecting any technical comment :) Technical comment on a beeper???? A beeper is a beeper is a beeper is a ...............beeper. Not exactly the most technologically complex device in the world. >>>> Hi, >>>> [quoted text clipped - 24 lines] > > Not exactly the most technologically complex device in the world. Yeah, right! Bike is a bike, and it has been a bike... If you do not see aything new on it I suggest that you do what your survey says - pass >>>>> Hi, >>>>> [quoted text clipped - 29 lines] > If you do not see aything new on it I suggest that you do what your > survey says - pass "aything new" ??? Let's see - a G-switch ? BFD Consider it passed. > I was expecting any technical comment :) OK, some technical comment. This is a rocket group, people here like to know the weight of what they put in their rockets. Rather than "Hear how loud it is?", give some specs like dB at feet. What is the power source, is it readily available? How long will it beep? Just a start. I know your video was just an intro but you could have got those specs in. Best Regards, Tom >>I was expecting any technical comment :) > [quoted text clipped - 8 lines] > Best Regards, > Tom Tom, here is data: size: 55mm x 15mm (2.16 x 0.59 in), size of AA battery, weight: less than 7 grams (0.2469 oz.) battery included, Sound Pressure Level: 85 dB (@ 0.328 feet), beeping starts with rocket's lift off. Duration of non-stop beeping was not measured (yet). Our prototype which flew with rockets many times 2 years ago, was all this time in "sleep" mode and it still beeps on nicely since beeper consumes less than 10 nanoAmps in sleep mode. Specs are on the web page (URL can be found at the end of video). Best regards, Jure >>>I was expecting any technical comment :) >> [quoted text clipped - 27 lines] > Best regards, > Jure Thanks Jure, I don't think I could hear 85dB at 4 inches unless I was on top of it. By then I would see my streamers. Thanks for the info. Tom >>>>I was expecting any technical comment :) >>> [quoted text clipped - 33 lines] > Thanks for the info. > Tom Tom, well you can hear it on a video, namely camera is aprox. 1 meter (39 inch) away and you can hear beeping very clearly. Sound pressure level of 85dB is stated in the data sheet of manufacturer of buzzer. Take my word, this buzzer is one of the loudest at rated voltage, because it has built in a small transformer which lifts internal supply voltage for the buzzer, that is why it beeps louder than other "non-transformer" ones. Best regards Jure >>>>>I was expecting any technical comment :) >>>> [quoted text clipped - 46 lines] > Best regards > Jure Hi Jure, It doesn't matter about the transformer or anything else, if the output is 85dB at .328 feet at 30 feet the sound will not be loud enough to break background noise. Your camera at 1 meter has a microphone and audio amplifier, at 1 meter I can find my rocket blindfolded. A home firealarm horn is 85 dB at 10 feet.( In the USA) The high frequency of your device helps cut through background noise so it is good as an indicator but at that frequency it is difficult to get a sense of direction. One may hear it but can't tell where it is coming from. Your device has promise but as is will not be very usefull for finding rockets. Regards, Tom >>>>>>I was expecting any technical comment :) >>>>> [quoted text clipped - 64 lines] > > Tom Hi Tom, I agree with all what you say. What I wanted to emphasize is that comparing to other simmilar beepers that are already selling on the market our has some significant improvements. Of course all these small beepers just do not have enough energy to beep loud - like your home firealarm. Thanks Tom for your thoughts. Best regards Jure |
Reply to this Message |
 Sign In
 Join
 My Latest Posts My Monitored Threads My Blog My Photo Gallery My Profile My Homepage Start New Thread Enable EMail Alerts Rate this Thread
|
©2012 Advenet LLC Privacy Policy - Terms of Use
This website includes both content owned or controlled by Advenet as well as content owned or controlled by third parties.