<html xmlns:v="urn:schemas-microsoft-com:vml" xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns:m="http://schemas.microsoft.com/office/2004/12/omml" xmlns="http://www.w3.org/TR/REC-html40"><head><meta http-equiv=Content-Type content="text/html; charset=utf-8"><meta name=Generator content="Microsoft Word 15 (filtered medium)"><title>Re: Bezdrátová signalizace z 2m hloubky</title><style><!--
/* Font Definitions */
@font-face
{font-family:Wingdings;
panose-1:5 0 0 0 0 0 0 0 0 0;}
@font-face
{font-family:"Cambria Math";
panose-1:2 4 5 3 5 4 6 3 2 4;}
@font-face
{font-family:Calibri;
panose-1:2 15 5 2 2 2 4 3 2 4;}
@font-face
{font-family:Tahoma;
panose-1:2 11 6 4 3 5 4 4 2 4;}
@font-face
{font-family:Consolas;
panose-1:2 11 6 9 2 2 4 3 2 4;}
/* Style Definitions */
p.MsoNormal, li.MsoNormal, div.MsoNormal
{margin:0cm;
margin-bottom:.0001pt;
font-size:12.0pt;
font-family:"Times New Roman",serif;
color:black;}
a:link, span.MsoHyperlink
{mso-style-priority:99;
color:blue;
text-decoration:underline;}
a:visited, span.MsoHyperlinkFollowed
{mso-style-priority:99;
color:purple;
text-decoration:underline;}
p
{mso-style-priority:99;
mso-margin-top-alt:auto;
margin-right:0cm;
mso-margin-bottom-alt:auto;
margin-left:0cm;
font-size:12.0pt;
font-family:"Times New Roman",serif;
color:black;}
pre
{mso-style-priority:99;
mso-style-link:"HTML Preformatted Char";
margin:0cm;
margin-bottom:.0001pt;
font-size:10.0pt;
font-family:"Courier New";
color:black;}
span.EmailStyle17
{mso-style-type:personal;
font-family:"Calibri",sans-serif;
color:#1F497D;}
span.HTMLPreformattedChar
{mso-style-name:"HTML Preformatted Char";
mso-style-priority:99;
mso-style-link:"HTML Preformatted";
font-family:Consolas;
color:black;}
span.EmailStyle21
{mso-style-type:personal-reply;
font-family:"Calibri",sans-serif;
color:#1F497D;}
.MsoChpDefault
{mso-style-type:export-only;
font-size:10.0pt;}
@page WordSection1
{size:612.0pt 792.0pt;
margin:72.0pt 72.0pt 72.0pt 72.0pt;}
div.WordSection1
{page:WordSection1;}
--></style><!--[if gte mso 9]><xml>
<o:shapedefaults v:ext="edit" spidmax="1026" />
</xml><![endif]--><!--[if gte mso 9]><xml>
<o:shapelayout v:ext="edit">
<o:idmap v:ext="edit" data="1" />
</o:shapelayout></xml><![endif]--></head><body bgcolor=white lang=CS link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US'>Dobry napad, ale asi bude problem s akustickym prizpusobenim – pocita to se vzduchem a pravdepodobne to bude mit problem s rezonancni frekvenci – tj bude lehce jinde. <o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US'>Samozrejme je otazka jake IP to bude mit. Netusim jestli to da trvale ponoreni, ale za trochu hrani by to stalo </span><span style='font-size:11.0pt;font-family:Wingdings;color:#1F497D;mso-fareast-language:EN-US'>J</span><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US'><o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US'>J.V.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US'><o:p> </o:p></span></p><div><div style='border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0cm 0cm 0cm'><p class=MsoNormal><b><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:windowtext'>From:</span></b><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:windowtext'> Hw-list [mailto:hw-list-bounces@list.hw.cz] <b>On Behalf Of </b>Jaroslav Buchta<br><b>Sent:</b> Thursday, November 29, 2018 3:19 PM<br><b>To:</b> hw-list@list.hw.cz<br><b>Subject:</b> Re: Bezdrátová signalizace z 2m hloubky<o:p></o:p></span></p></div></div><p class=MsoNormal><o:p> </o:p></p><div><p class=MsoNormal>Co parkovaci senzory? Neznam parametry ale musi umet vysilat i prijimat, na vodu jsou take zvykle...<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>Dne 29.11.2018 v 14:55 Zuffa Jan napsal(a):<o:p></o:p></p></div><blockquote style='margin-top:5.0pt;margin-bottom:5.0pt'><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'>Tak trochu.</span><o:p></o:p></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'>Citlivost oproti beznemu mikrofonu je </span><o:p></o:p></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'>o rad a viac mensia, chce to proste citlivu jemnu membranu</span><o:p></o:p></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'>a to piezomenic rozhodne nie je. Straty pri rozkmitani</span><o:p></o:p></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'>onho medeneho pliesku su vysoke</span><o:p></o:p></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'> </span><o:p></o:p></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'>j.</span><o:p></o:p></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'> </span><o:p></o:p></p><div><div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm 0cm 0cm'><p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma",sans-serif'>From:</span></b><span style='font-size:10.0pt;font-family:"Tahoma",sans-serif'> Hw-list [<a href="mailto:hw-list-bounces@list.hw.cz">mailto:hw-list-bounces@list.hw.cz</a>] <b>On Behalf Of </b>Tomáš Hamouz<br><b>Sent:</b> Thursday, November 29, 2018 11:47 AM<br><b>To:</b> HW-news<br><b>Subject:</b> Re: Bezdrátová signalizace z 2m hloubky</span><o:p></o:p></p></div></div><p class=MsoNormal> <o:p></o:p></p><p class=MsoNormal style='margin-bottom:12.0pt'><span style='font-size:10.0pt;font-family:"Courier New"'>Pokud dokážete rozumnÄ› navázat (akusticky) piezzo mÄ›niÄŤ, tak funguje i jako mikrofon.<br><br>Tomáš<br><br><br></span><o:p></o:p></p><table class=MsoNormalTable border=0 cellpadding=0><tr><td width=6 style='width:2.25pt;background:blue;padding:.75pt .75pt .75pt .75pt'></td><td width=654 style='width:865.5pt;padding:.75pt .75pt .75pt .75pt'><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'>Ano vysilat magnetostrikcnimm menicem – kuchnete jakykoliv stary uzv odparovac.<br>Vetsi sranda nastane s UZV mikrofonem </span><span style='font-size:11.0pt;font-family:Wingdings;color:#1F497D'>J<br></span><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'>I protoo jsem psal zvuk / uzv. Pokud nutne nepotrebujete, aby to nebylo slyset jdete do zvuku a pouzijte nejake zakladni kodovani – vyselektujete to pak i uprostred neskutecneho kravalu.<br>J.V.<br> <br></span><b><span style='font-size:11.0pt;font-family:"Calibri",sans-serif'>From:</span></b><span style='font-size:11.0pt;font-family:"Calibri",sans-serif'> Hw-list [<a href="mailto:hw-list-bounces@list.hw.cz">mailto:hw-list-bounces@list.hw.cz</a>] <b>On Behalf Of </b>Pavel Hudecek<br><b>Sent:</b> Wednesday, November 28, 2018 9:05 PM<br><b>To:</b> HW-news <<a href="mailto:hw-list@list.hw.cz">hw-list@list.hw.cz</a>><br><b>Subject:</b> Re: Bezdrátová signalizace z 2m hloubky<br></span> <br><span style='font-family:"Calibri",sans-serif'>StaÄŤĂ i jeden a z jednĂ© strany uzavĹ™ená komĹŻrka se vzduchem. Ale funguje to jen do urÄŤitĂ© hloubky, neĹľ se repráček promáčkne:-) Lepšà je to pak s pouĹľitĂm mÄ›niÄŤe do UZ myÄŤky.<br> <br>Ponorky pouĹľĂvajĂ magnetostrikci, tam se mÄ›nĂ objem feritu. Vezmete nejhoršà ferit, dáte do cĂvky a pustĂte kHz:-)<br> <br>PH<br></span><span style='font-size:10.0pt;font-family:"Tahoma",sans-serif'> <br><b>From:</b> </span><a href="mailto:ladislav.krucinsky@linde-mh.cz"><span style='font-size:10.0pt;font-family:"Tahoma",sans-serif'>Krucinsky, Ladislav</span></a><br><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'>Asi by ten ultrazvuk šel ale jak ho vyzářit? Existuje nÄ›jakĂ˝ reproduktor kterĂ˝ by dal ponoĹ™enĂ do 2m a ten ultrazvuk vyzářil dostateÄŤnÄ› efektivnÄ›? Aby sudĂ nemusel plavat s autobateriĂ na zádech…<br>Jak se vĹŻbec zářà do vody? Co jsem studoval tak je to na principu dvou membrán, kterĂ© jsou buzeny soufázovÄ› a de facto ten reproduktorek zvÄ›tšuje/zmenšuje objem. <br></span> <br> <br><b><span style='font-size:10.0pt;font-family:"Tahoma",sans-serif'>From:</span></b><span style='font-size:10.0pt;font-family:"Tahoma",sans-serif'> Hw-list [</span><a href="mailto:hw-list-bounces@list.hw.cz"><span style='font-size:10.0pt;font-family:"Tahoma",sans-serif'>mailto:hw-list-bounces@list.hw.cz</span></a><span style='font-size:10.0pt;font-family:"Tahoma",sans-serif'>] <b>On Behalf Of </b>Pavel Hudecek<br></span><span style='font-family:"Calibri",sans-serif'>AmerickĂ© ponorky komunikujĂ na 76 Hz, ruskĂ© na 82 Hz (ano je to bez k).<br> <br>A souhlasĂm, Ĺľe pro bazĂ©n by byly nejlepšà ty kHz a cĂvka okolo. U vysĂlaÄŤe pak tĹ™eba feritka jako na tĂ˝ fotce. Na obou stranách by se to mÄ›lo naladit do rezonance a bude to OK.<br> <br>Ale (ultra)zvuk bude jednoduššĂ).<br> <br></span><span style='font-size:10.0pt;font-family:"Tahoma",sans-serif'> <br><b>From:</b> </span><a href="mailto:honza.kuba@gmail.com"><span style='font-size:10.0pt;font-family:"Tahoma",sans-serif'>Jan Kuba</span></a><br><span style='font-family:"Calibri",sans-serif'>Ponorky komunikujĂ na kmitoÄŤtech 78-82 kHz , vodou dobĹ™e proniká magnetická sloĹľka energie. Ponorky pouĹľĂvajĂ i rámovĂ© antĂ©ny... <br>V pĹ™Ăloze je starĂ˝ rozebranĂ˝ vysĂlaÄŤ dálkovĂ©ho ovládánĂ vrat. PĹ™ijĂmacĂ antĂ©na byla rámová antĂ©na instalovaná pĹ™Ămo do otvoru garážovĂ©ho vjezdu. <br>TvoĹ™ila ho cĂvka z 0,5 mm drátu, 8 závitĹŻ.<br>Fungovalo to na 9,2kHz ( TX ještÄ› funguje ) a dosah byl okolo 40 metrĹŻ!!!<br>VĂ˝hoda je, Ĺľe pro tenhle kmitoÄŤet nenĂ tĹ™eba žádnĂ© povolenĂ pro provoz rádiovĂ©ho zaĹ™ĂzenĂ........<br> <br>Kdyby se natáhla kolem bazĂ©nu smyÄŤka s nÄ›kolika závity ( u stropu tĹ™eba ) , věřĂm, Ĺľe by to takĂ© fungovalo i z vody. I kdyĹľ samozĹ™ejmÄ› by to chtÄ›lo ověřit v praxi.<br>PĹ™ijĂmaÄŤ by samozĹ™ejmÄ› musel bĂ˝t selektivnĂ, ladÄ›nĂ˝ na kmitoÄŤet toho "feritovĂ©ho" vysĂlaÄŤe.</span><o:p></o:p></p></td></tr></table><p class=MsoNormal> <o:p></o:p></p><p class=MsoNormal><br><br><o:p></o:p></p><pre>_______________________________________________<o:p></o:p></pre><pre>HW-list mailing list - sponsored by <a href="http://www.HW.cz">www.HW.cz</a><o:p></o:p></pre><pre><a href="mailto:Hw-list@list.hw.cz">Hw-list@list.hw.cz</a><o:p></o:p></pre><pre><a href="http://list.hw.cz/mailman/listinfo/hw-list">http://list.hw.cz/mailman/listinfo/hw-list</a><o:p></o:p></pre></blockquote><p><o:p> </o:p></p></div></body></html>