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	<title>Gerson Diesel Blog</title>
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	<link>http://www.gersondiesel.com.br</link>
	<description>TI, tecnologia e outras coisas mais...</description>
	<pubDate>Sun, 28 Feb 2010 23:04:39 +0000</pubDate>
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		<title>Transformando uma webcam em uma câmera infra-vermelho</title>
		<link>http://www.gersondiesel.com.br/2010/02/16/transformando-uma-webcam-em-uma-camera-infra-vermelho/</link>
		<comments>http://www.gersondiesel.com.br/2010/02/16/transformando-uma-webcam-em-uma-camera-infra-vermelho/#comments</comments>
		<pubDate>Wed, 17 Feb 2010 02:16:27 +0000</pubDate>
		<dc:creator>Gerson Diesel</dc:creator>
		
		<category><![CDATA[Geral]]></category>

		<category><![CDATA[CCV]]></category>

		<category><![CDATA[Infra-red]]></category>

		<category><![CDATA[TBETA]]></category>

		<category><![CDATA[Vtrex 120fps]]></category>

		<category><![CDATA[Webcam IR]]></category>

		<guid isPermaLink="false">http://www.gersondiesel.com.br/?p=234</guid>
		<description><![CDATA[&#160;Para os meus testes com o software CCV (Community Core Vision), eu necessitava de uma c&#226;mera que capturasse somente infra-vermelho. Procurando na web encontrei artigos que explicam como transformar uma webcam em uma c&#226;mera infra-vermelho.
Basicamente &#233; necess&#225;rio 2 transforma&#231;&#245;es:

Remove o filtro IR presente na webcam;
Colocar outro filtro, que permita a passagem somente de infra-vermelho;

Mostrarei um [...]]]></description>
			<content:encoded><![CDATA[<p>&nbsp;Para os meus testes com o software <a target="_blank" href="http://ccv.nuigroup.com">CCV (Community Core Vision)</a>, eu necessitava de uma c&acirc;mera que capturasse somente infra-vermelho. Procurando na web encontrei artigos que explicam como transformar uma webcam em uma c&acirc;mera infra-vermelho.</p>
<p>Basicamente &eacute; necess&aacute;rio 2 transforma&ccedil;&otilde;es:</p>
<ol>
<li>Remove o filtro IR presente na webcam;</li>
<li>Colocar outro filtro, que permita a passagem somente de infra-vermelho;</li>
</ol>
<p>Mostrarei um passo-a-passo de como realizar esta transforma&ccedil;&atilde;o em uma webcam Vtrex 120fps. Fiz em outra webcam tamb&eacute;m, e os passos s&atilde;o todos iguais. Acredito que o procedimento possa ser realizado em qualquer webcam.</p>
<p>&nbsp;</p>
<p><span style="font-size: larger; "><strong>1. Remover a tampa da webcam e retirar os parafusos da placa l&oacute;gica.</strong></span></p>
<p style="text-align: center; "><img alt="Webcam sem a tampa traseira" width="420" height="315" border="1" src="http://www.gersondiesel.com.br/wordpress/wp-content/uploads/image/1_sem_tampa_traseira.jpg" /></p>
<p style="text-align: left; ">&nbsp;</p>
<p style="text-align: left; "><span style="font-size: larger; "><strong>2. Remover a tampa frontal da lente. Basta puxar que ela &eacute; encaixada.</strong></span></p>
<p style="text-align: center; ">&nbsp;<img alt="Remover a tampa frontal" width="420" height="295" border="1" src="http://www.gersondiesel.com.br/wordpress/wp-content/uploads/image/2_tampa_frontal.jpg" /></p>
<p style="text-align: left; ">&nbsp;</p>
<p style="text-align: left; "><span style="font-size: larger; "><strong>3. Remover a placa l&oacute;gica da carca&ccedil;a frontal. Desenroscar a lente at&eacute; sair.</strong></span></p>
<p style="text-align: center; ">&nbsp;<img alt="Leds da lente" width="205" height="179" border="1" src="http://www.gersondiesel.com.br/wordpress/wp-content/uploads/image/3_leds_lente.jpg" />&nbsp;<img alt="Lente frontal" width="210" height="179" border="1" src="http://www.gersondiesel.com.br/wordpress/wp-content/uploads/image/4_leds_lente.jpg" /></p>
<p style="text-align: left; ">&nbsp;</p>
<p style="text-align: left; "><span style="font-size: larger; "><strong>4. Surge o filtro infra-vermelho que deve ser retirado. Geralmente s&oacute; quebrando.</strong></span></p>
<p style="text-align: center; "><img alt="Filtro IR" width="420" height="440" border="1" src="http://www.gersondiesel.com.br/wordpress/wp-content/uploads/image/5_filtro_ir.jpg" /></p>
<p style="text-align: left; ">&nbsp;</p>
<p style="text-align: left; "><strong>Eis o que sobrou do filtro IR.</strong></p>
<p style="text-align: center; "><img alt="ir quebrado" width="420" height="226" border="1" src="http://www.gersondiesel.com.br/wordpress/wp-content/uploads/image/6_filtro_ir_quebrado.jpg" /></p>
<p style="text-align: left; ">&nbsp;</p>
<p style="text-align: left; "><span style="font-size: larger; "><strong>5. Recortar um peda&ccedil;o de filme de m&aacute;quina fotogr&aacute;fica que encaixe no lugar o filtro IR.</strong></span></p>
<p style="text-align: center; ">&nbsp;<img alt="Filme negativo" width="420" height="393" border="1" src="http://www.gersondiesel.com.br/wordpress/wp-content/uploads/image/7_filme_negativo.jpg" /></p>
<p style="text-align: left; "><span style="font-size: larger; "><strong>6. Colocar o peda&ccedil;o de filme de negativo no lugar do filtro IR.</strong></span></p>
<p style="text-align: center; ">&nbsp;<img alt="Filtro filme" width="205" height="260" border="1" src="http://www.gersondiesel.com.br/wordpress/wp-content/uploads/image/8_lente_filme.jpg" />&nbsp;<img alt="Filtro filme" width="205" height="260" border="1" src="http://www.gersondiesel.com.br/wordpress/wp-content/uploads/image/9_lente_filme.jpg" /></p>
<p style="text-align: left; "><span style="font-size: larger; "><strong>7. Remontar a webcam.</strong></span></p>
<p style="text-align: left; ">&nbsp;</p>
<p style="text-align: left; ">A partir da&iacute;, a webcam s&oacute; ir&aacute; capturar imagens em infra-vermelho. A espessura do filme de negativo e se o mesmo &eacute; mais escuro ou mais claro vai depender da finalidade do uso da webcam.</p>
<p style="text-align: left; ">No meu caso, quero utilizar leds infra-vermelho apontados diretamente na webcam, por isto o filme deve ser bastante escuro.</p>
<p style="text-align: left; ">Aproveito e mostro um pouco do uso da webcam infra-vermelho nos meus testes com o software CCV.</p>
<p style="text-align: center; "><img alt="Leds" width="420" height="343" border="1" src="http://www.gersondiesel.com.br/wordpress/wp-content/uploads/image/1_leds.jpg" /></p>
<p style="text-align: center; ">Leds IR acion&aacute;veis por bot&atilde;o de 1 estado.</p>
<p style="text-align: center; "><img alt="Leds acesos" width="420" height="395" border="1" src="http://www.gersondiesel.com.br/wordpress/wp-content/uploads/image/2_leds_acesos.jpg" /></p>
<p style="text-align: center; ">Leds IR acesos (c&acirc;meras digitais &quot;enxergam&quot; infra-vermelho)</p>
<p style="text-align: center; "><img alt="Leds nos dedos" width="420" height="331" border="1" src="http://www.gersondiesel.com.br/wordpress/wp-content/uploads/image/3_leds_mao.jpg" /></p>
<p style="text-align: center; ">Leds nos dedos</p>
<p style="text-align: center; "><img alt="Leds nos dedos" width="420" height="315" border="1" src="http://www.gersondiesel.com.br/wordpress/wp-content/uploads/image/4_leds_mao.jpg" /></p>
<p style="text-align: center; ">Leds nos dedos</p>
<p style="text-align: center; "><img alt="Software CCV" width="420" height="276" border="1" src="http://www.gersondiesel.com.br/wordpress/wp-content/uploads/image/10_ccv.jpg" /></p>
<p style="text-align: center; ">Software CCV - Community Core Vision</p>
<p style="text-align: left; ">&nbsp;</p>
<p style="text-align: left; ">&nbsp;E aqui vai uma palhinha do uso do conjunto: Webcam infra-vermelho + leds + CCV:&nbsp;&nbsp;</p>
<p style="text-align: center; "><object width="425" height="344"><param name="movie" value="http://www.youtube.com/v/rS94xGSfVKg&amp;hl=pt_BR&amp;fs=1&amp;" /><param name="allowFullScreen" value="true" /><param name="allowscriptaccess" value="always" /><embed src="http://www.youtube.com/v/rS94xGSfVKg&amp;hl=pt_BR&amp;fs=1&amp;" type="application/x-shockwave-flash" allowscriptaccess="always" allowfullscreen="true" width="425" height="344"></embed></object></p>
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		<item>
		<title>Análise da webcam VTrex 120fps</title>
		<link>http://www.gersondiesel.com.br/2010/02/16/analise-da-webcam-vtrex-120fps/</link>
		<comments>http://www.gersondiesel.com.br/2010/02/16/analise-da-webcam-vtrex-120fps/#comments</comments>
		<pubDate>Wed, 17 Feb 2010 00:07:11 +0000</pubDate>
		<dc:creator>Gerson Diesel</dc:creator>
		
		<category><![CDATA[Geral]]></category>

		<category><![CDATA[FPS]]></category>

		<category><![CDATA[Vtrex]]></category>

		<category><![CDATA[Vtrex 120fps]]></category>

		<category><![CDATA[Webcam]]></category>

		<guid isPermaLink="false">http://www.gersondiesel.com.br/?p=222</guid>
		<description><![CDATA[Faz alguns meses que adquiri uma webcam para testar um software de multitoque, o CCV (Community Core Vision), que para seu pleno funcionamento, exigia uma camera de alto FPS.
Procurando pela web, me deparei com o an&#250;ncio de uma webcam de 120fps! &#160;Adquiri a mesma pensando que seria a ideal para o meu projeto. Contudo, ap&#243;s [...]]]></description>
			<content:encoded><![CDATA[<p>Faz alguns meses que adquiri uma webcam para testar um software de multitoque, o <a target="_blank" href="http://ccv.nuigroup.com">CCV (Community Core Vision)</a>, que para seu pleno funcionamento, exigia uma camera de alto FPS.</p>
<p>Procurando pela web, me deparei com o an&uacute;ncio de uma webcam de 120fps! &nbsp;Adquiri a mesma pensando que seria a ideal para o meu projeto. Contudo, ap&oacute;s testes, percebi que esta c&acirc;mera &eacute; de <strong>AT&Eacute;</strong> 120fps! Ou seja, ela PODE atingir 120fps dependendo das condi&ccedil;&otilde;es do ambiente e sua luminosidade. Ap&oacute;s preparar a c&acirc;mera para capturar somente infra-vermelho, consegui somente 18fps em m&eacute;dia. Um custo muito alto de fps. Al&eacute;m disto, os 120fps s&oacute; s&atilde;o alcan&ccedil;ados com a resolu&ccedil;&atilde;o mais baixa. Quanto maior a resolu&ccedil;&atilde;o, menos FPS.</p>
<p>Isto se deve ao fato de esta c&acirc;mera possuir o recurso AUTO EXPOSURE (exposi&ccedil;&atilde;o autom&aacute;tica), que ajusta automaticamente a qualidade da imagem de acordo com a quantidade de luz do ambiente. Este ajuste autom&aacute;tico custa v&aacute;rios FPS, ou seja, para manter a imagem com uma qualidade boa em baixas condi&ccedil;&otilde;es de luminosidade, ela necessita baixar os FPS. Pena que s&oacute; fui descobrir isto ap&oacute;s me deparar com o problema, mas pesquisa &eacute; para isto mesmo.</p>
<p>Infelizmente, nesta c&acirc;mera, n&atilde;o &eacute; poss&iacute;vel desabilitar este recurso. Nas configura&ccedil;&otilde;es da c&acirc;mera no windows a caixa referente &agrave; exposi&ccedil;&atilde;o autom&aacute;tica fica desabilitada (cinza escuro) e no Linux (sim, esta c&acirc;mera funciona no Linux), o comando para desabilitar o auto exposure retorna um erro.</p>
<p>Existem outras c&acirc;meras que possuem o FPS fixo, e a possibilidade de desabilitar o recurso de exposi&ccedil;&atilde;o autom&aacute;tica. Uma delas &eacute; a Philips SPC900NC, que possui 90fps, e &eacute; utilizada inclusive para observa&ccedil;&atilde;o astron&ocirc;mica.</p>
<p>Mas para quem ainda planeja adquirir esta webcam para uso trivial (videochat, confer&ecirc;ncia, youtube, etc&#8230;) pode ser uma boa op&ccedil;&atilde;o. Por isto deixo aqui um review e algumas imagens da c&acirc;mera.</p>
<p><strong>Caracter&iacute;sticas:</strong></p>
<ul>
<li>A Webcam possui uma base/clip grande podendo ser apoiada na mesa ou ent&atilde;o &quot;clipada&quot; na tela do notebook ou em uma tela de LCD.</li>
<li>Possui 4 leds brancos que auxiliam na ilumina&ccedil;&atilde;o do ambiente, ligados atrav&eacute;s de um interruptor localizado atr&aacute;s da c&acirc;mera.</li>
<li>Gira 360 graus horizontais em sua base.</li>
<li>Funciona em Windows e Linux.</li>
<li>O chip da webcam &eacute; um SUNPLUS SPCA2000A.</li>
<li>Acompanha software de efeitos especiais. Este programa se diz composto de +4000 efeitos especiais. Mas n&atilde;o se engane, este n&uacute;mero &eacute; alcan&ccedil;ado com combina&ccedil;&otilde;es de efeitos. Por exemplo: olhos + cabelo + fundo + outros efeitos.</li>
<li>&nbsp;Possui microfone embutido.</li>
<li>Conex&atilde;o USB e P2 para o microfone.</li>
</ul>
<p style="text-align: center; ">&nbsp;<img alt="Caixa da Vtrex 120fps" width="420" height="293" border="1" align="middle" longdesc="undefined" src="http://www.gersondiesel.com.br/wordpress/wp-content/uploads/image/1_caixa_vtrex.jpg" /></p>
<p style="text-align: center; ">Caixa da &quot;Super Webcam Vtrex&quot;.</p>
<p style="text-align: center; "><img alt="Conte&uacute;do da caixa" width="420" height="315" border="1" align="middle" src="http://www.gersondiesel.com.br/wordpress/wp-content/uploads/image/2_conteudo_caixa.jpg" /></p>
<p style="text-align: center; ">Conte&uacute;do da caixa: Webcam, manual e cd.</p>
<p style="text-align: center; "><img width="210" height="309" border="1" alt="Webcam sobre a mesa" src="http://www.gersondiesel.com.br/wordpress/wp-content/uploads/image/3_camera.jpg" />&nbsp;&nbsp;<img width="217" height="309" border="1" alt="Webcam clipada no monitor" src="http://www.gersondiesel.com.br/wordpress/wp-content/uploads/image/5_leds.jpg" /></p>
<p style="text-align: center; ">Webcam sobre a mesa e &quot;clipada&quot; no monitor LCD com os leds acesos.</p>
<p style="text-align: center; "><img alt="Conectors USB e P2" width="420" height="308" border="1" src="http://www.gersondiesel.com.br/wordpress/wp-content/uploads/image/4_conectores.jpg" /></p>
<p style="text-align: center; ">Conectores USB e P2 do microfone.</p>
<p style="text-align: center; "><img alt="Placa l&oacute;gica e CHIP SUNPLUS" width="420" height="430" border="1" src="http://www.gersondiesel.com.br/wordpress/wp-content/uploads/image/6_chip.jpg" /></p>
<p style="text-align: center; ">Placa l&oacute;gica e chip SUNPLUS SPCA2000A.</p>
<p style="text-align: center; "><img alt="AMCAP Windows 50fps" width="420" height="359" border="1" src="http://www.gersondiesel.com.br/wordpress/wp-content/uploads/image/8_mcap_windows.jpg" /></p>
<p style="text-align: center; ">Funcionamento no Windows a 50.1 FPS em 640&#215;480.</p>
<p style="text-align: center; "><img alt="Funcionamento no Linux a 47 fps" width="420" height="260" border="1" src="http://www.gersondiesel.com.br/wordpress/wp-content/uploads/image/7_luvcview_linux.jpg" /></p>
<p style="text-align: center; ">Funcionamento no Linux a 47 FPS em 640&#215;480.</p>
<p style="text-align: left; "><strong>Conclus&atilde;o:</strong></p>
<p style="text-align: left; ">&Eacute; uma boa c&acirc;mera para videochat, confer&ecirc;ncia e pequenos v&iacute;deos, mas n&atilde;o serve para obter altos FPS a baixas luminosidades.</p>
<p style="text-align: left; ">&nbsp;</p>



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		</item>
		<item>
		<title>Dica rápida: remover o Grub instalado indevidamente na partição windows</title>
		<link>http://www.gersondiesel.com.br/2009/09/20/dica-rapida-remover-o-grub-instalado-indevidamente-na-particao-windows/</link>
		<comments>http://www.gersondiesel.com.br/2009/09/20/dica-rapida-remover-o-grub-instalado-indevidamente-na-particao-windows/#comments</comments>
		<pubDate>Mon, 21 Sep 2009 02:27:36 +0000</pubDate>
		<dc:creator>Gerson Diesel</dc:creator>
		
		<category><![CDATA[Linux]]></category>

		<category><![CDATA[Fdisk]]></category>

		<category><![CDATA[Grub]]></category>

		<category><![CDATA[partição]]></category>

		<category><![CDATA[Windows 7]]></category>

		<category><![CDATA[Windows XP]]></category>

		<guid isPermaLink="false">http://www.gersondiesel.com.br/?p=209</guid>
		<description><![CDATA[Em sistemas dual boot, com windows e linux instalados no mesmo computador, pode ocorrer uma distra&#231;&#227;o na hora de configurar o grub e instalar na parti&#231;&#227;o do windows. Por exemplo, instalar no /dev/sda3 (no meu caso) ao inv&#233;s de /dev/sda.
Isto ocorreu comigo estes dias, quando eu configurava o menu.lst, e ap&#243;s rodar o comando grub-install [...]]]></description>
			<content:encoded><![CDATA[<p>Em sistemas dual boot, com windows e linux instalados no mesmo computador, pode ocorrer uma distra&ccedil;&atilde;o na hora de configurar o grub e instalar na parti&ccedil;&atilde;o do windows. Por exemplo, instalar no /dev/sda3 (no meu caso) ao inv&eacute;s de /dev/sda.</p>
<p>Isto ocorreu comigo estes dias, quando eu configurava o menu.lst, e ap&oacute;s rodar o comando grub-install eu coloquei /dev/sda3 ao inv&eacute;s de /dev/sda. Resultado: o grub ficou instalado na parti&ccedil;&atilde;o do windows, impedindo de inicializ&aacute;-lo.</p>
<p>Uma maneira r&aacute;pida de remover o grub da parti&ccedil;&atilde;o do windows &eacute; utilizar o comando dd da seguinte forma:</p>
<pre>
# dd if=/dev/null of=/dev/sd<strong>X</strong> bs=446 count=1</pre>
<p>&nbsp;Onde <strong>X</strong> &eacute; a parti&ccedil;&atilde;o do windows.</p>
<p>No meu caso, a parti&ccedil;&atilde;o do windows &eacute; /dev/sda3, conforme resultado do fdisk -l:</p>
<pre>
Dispositivo Boot      Start         End      Blocks   Id  System
/dev/sda1               1       26134   209921323+  83  Linux
/dev/sda2           26135       26593     3686917+  82  Linux swap / Solaris
/dev/sda3   *       26594       30401    30587760    7  HPFS ou NTFS
</pre>
<p>&nbsp;<br />
Dica retirada de: <a target="_blank" href="http://blogs.koolwal.net/2009/06/08/howto-how-to-erase-un-install-grub-from-mbr-to-restore-windowsdos-bootloader/">http://blogs.koolwal.net/2009/06/08/howto-how-to-erase-un-install-grub-from-mbr-to-restore-windowsdos-bootloader/</a></p>
<p>&nbsp;</p>
<p><strong>Atualiza&ccedil;&atilde;o de 16/02/2010:</strong></p>
<p>- Quando a vers&atilde;o do Windows instalado for a XP, pode-se utilizar o cd de instala&ccedil;&atilde;o do Windows para remover o Grub. Logo ap&oacute;s o boot pelo CD deve-se escolher a op&ccedil;&atilde;o referente &agrave; &quot;recupera&ccedil;&atilde;o&quot;, apertando F8. No prompt de comando deve-se digitar FDISK /MBR, que o Grub ser&aacute; removido.</p>
<p>O Rafael tamb&eacute;m deixou uma dica no dia 16/02/2010, quando ele quis remover o Grub instalado indevidamente na parti&ccedil;&atilde;o do Windows 7. Ele possu&iacute;a mais de um HD no computador e teve de desconectar um deles para que o procedimento funcionasse. Veja mais abaixo nos coment&aacute;rios qual foi a dica dele.</p>



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		</item>
		<item>
		<title>FISL X - Décimo Fórum Internacional de Software Livre</title>
		<link>http://www.gersondiesel.com.br/2009/08/22/fisl-x-decimo-forum-internacional-de-software-livre/</link>
		<comments>http://www.gersondiesel.com.br/2009/08/22/fisl-x-decimo-forum-internacional-de-software-livre/#comments</comments>
		<pubDate>Sun, 23 Aug 2009 00:41:37 +0000</pubDate>
		<dc:creator>Gerson Diesel</dc:creator>
		
		<category><![CDATA[Software Livre]]></category>

		<category><![CDATA[FISL]]></category>

		<category><![CDATA[Stallmann]]></category>

		<guid isPermaLink="false">http://www.gersondiesel.com.br/?p=183</guid>
		<description><![CDATA[Ap&#243;s dois meses do D&#233;cimo F&#243;rum Internacional de Software Livre, alguns upgrades de hardware, reinstala&#231;&#245;es de sistema operacional e backups pra todo lado, enfim encontrei algum tempo para atualizar o blog.
O assunto &#233; FISL X - D&#233;cimo F&#243;rum Internacional de Software Livre, que ocorreu na data de 24 a 27 de julho no centro de [...]]]></description>
			<content:encoded><![CDATA[<p>Ap&oacute;s dois meses do D&eacute;cimo F&oacute;rum Internacional de Software Livre, alguns upgrades de hardware, reinstala&ccedil;&otilde;es de sistema operacional e backups pra todo lado, enfim encontrei algum tempo para atualizar o blog.</p>
<p>O assunto &eacute; FISL X - D&eacute;cimo F&oacute;rum Internacional de Software Livre, que ocorreu na data de 24 a 27 de julho no centro de eventos da PUC-RS.</p>
<p>Para quem n&atilde;o conhece, o FISL - F&oacute;rum Internacional de Software Livre &eacute; um evento anual que este ano comemorou sua d&eacute;cima edi&ccedil;&atilde;o. O objetivo do f&oacute;rum &eacute; reunir em um local todos aqueles que contribuem de alguma maneira para a comunidade de software livre, seja com desenvolvimento de software, dicas, publica&ccedil;&otilde;es e at&eacute; mesmo hardware. O site do evento &eacute; <a href="http://www.fisl.org.br" target="_blank">http://www.fisl.org.br</a>.</p>
<p>A atra&ccedil;&atilde;o principal do FISL s&atilde;o as palestras, divididas em temas e que ocorrem concomitantemente com mais ou menos uma hora de dura&ccedil;&atilde;o cada uma. Ao total foram cerca de 300 palestras abrangendo os mais diversos assuntos: seguran&ccedil;a, programa&ccedil;&atilde;o, administra&ccedil;&atilde;o de sistemas e outros. Os apresentadores das palestras v&atilde;o desde pequenos usu&aacute;rios (mas com grandes id&eacute;ias) at&eacute; grandes empresas, como SUN, Banco do Brasil, Caixa e Petrobras.</p>
<p>Falando em grandes empresas, este ano o f&oacute;rum contou com a participa&ccedil;&atilde;o da Globo.com. N&atilde;o sei a respeito dos outros, mas a mim surpreendeu muito. Surpreendeu no sentido de descobrir o quanto que eles utilizam de software livre, e o quanto eles contribuem para as comunidades.</p>
<p>Foram quatro dias de muita movimenta&ccedil;&atilde;o, gente pra todo lado, pois quando uma palestra acabava, tinha-se que andar r&aacute;pido para entrar em outra e n&atilde;o correr o risco de encontrar a sala lotada e ficar do lado de fora. Sim, apesar das salas serem grandes, algumas palestras lotavam.</p>
<p>Al&eacute;m das personalidades esperadas para o evento, como John Mad Dog Hall e Richard Stallmann, outra figura esperada foi Peter Sunde, um dos fundadores do site de compartilhamento de bittorrent Pirate Bay, condenado junto com os outros fundadores a 2 anos de pris&atilde;o, mas que ainda aguardavam recurso.</p>
<p>Dos pontos negativos, posso citar a &eacute;poca em que foi realizado, pois no m&ecirc;s de julho j&aacute; faz bastante frio aqui no sul. Nos outros anos ocorreu em meses mais quentes. Haviam muitas palestras boas ocorrendo ao mesmo tempo, deixando muita gente na d&uacute;vida sobre qual palestra participar.</p>
<p>Outro ponto negativo foi em rela&ccedil;&atilde;o &agrave; rede WiFi p&uacute;blica do evento. Era muito dif&iacute;cil conseguir uma conex&atilde;o, o m&aacute;ximo que consegui foi enviar alguns Tweets para o Twitter. Segundo a organiza&ccedil;&atilde;o do evento, o problema de conex&atilde;o era devido &agrave; grande quantidade de access points de expositores e tamb&eacute;m de pessoas que ativavam o WiFi dos seus notebooks com o mesmo SSID da rede p&uacute;blica, talvez por desconhecimento (acho improv&aacute;vel) ou para sacanear os outros.</p>
<p>O cansa&ccedil;o e o frio n&atilde;o deixaram eu ficar at&eacute; o final, mas com certeza todo o tempo que participei foi bem aproveitado. Consegui at&eacute; tirar uma foto com Richard Stallmann em uma sess&atilde;o de fotos. No f&oacute;rum anterior a foto foi com John Mad Dog Hall</p>
<p>&nbsp;</p>
<p style="text-align: center;"><img width="300" height="225" border="1" title="John Mad Dog Hall" alt="John Mad Dog Hall FISL9" src="http://www.gersondiesel.com.br/wordpress/wp-content/uploads/image/Diesel_JohnMadDog_FISL9.jpg" /><img width="300" height="225" border="1" alt="Richard Stallmann" src="http://www.gersondiesel.com.br/wordpress/wp-content/uploads/image/Diesel_Stallman_FISLX.JPG" /></p>
<p style="text-align: center;"><strong>John MadDog Hall no Fisl 9.0 &nbsp; &nbsp; &nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Richard Stallmann no Fisl X</strong> &nbsp;</p>
<p>Um abra&ccedil;o a todos e at&eacute; o pr&oacute;ximo FISL.</p>



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		<title>Microfone interno no Palm TX</title>
		<link>http://www.gersondiesel.com.br/2009/06/16/microfone-interno-no-palm-tx/</link>
		<comments>http://www.gersondiesel.com.br/2009/06/16/microfone-interno-no-palm-tx/#comments</comments>
		<pubDate>Wed, 17 Jun 2009 01:16:47 +0000</pubDate>
		<dc:creator>Gerson Diesel</dc:creator>
		
		<category><![CDATA[Palm]]></category>

		<category><![CDATA[Microfone no Palm TX]]></category>

		<guid isPermaLink="false">http://www.gersondiesel.com.br/?p=178</guid>
		<description><![CDATA[Palm TX internal MIC]]></description>
			<content:encoded><![CDATA[<p>Uma das reclama&ccedil;&otilde;es dos propriet&aacute;rios de Palm TX &eacute; a aus&ecirc;ncia de um microfone para grava&ccedil;&atilde;o de notas, reuni&otilde;es e palestras. <br />
&nbsp;<br />
Porque ser&aacute; que a Palm n&atilde;o colocou um item t&atilde;o b&aacute;sico e simples? Ou melhor, por que ela TIROU este item, visto que vers&otilde;es anteriores possuem esta facilidade? Numa vis&atilde;o capitalista, eu diria que &eacute; para vender acess&oacute;rios, pois existem microfones externos que se acoplam no &quot;conector universal&quot; do Palm. <br />
&nbsp;<br />
Por um tempo cogitei em comprar um microfone externo. Contudo, encontrei algumas desvantagens:&nbsp;</p>
<ul>
<li>Ter que carregar o microfone em separado.</li>
<li>N&atilde;o d&aacute; para deixar o microfone o tempo todo conectado, pois impede o uso de capas de prote&ccedil;&atilde;o e carteiras, al&eacute;m de ter que desconectar o microfone para ligar o cabo de sincronismo.</li>
<li>Fica feio, pois parece um caro&ccedil;o.</li>
</ul>
<p>Al&eacute;m do microfone externo, algumas pessoas descobriram que &eacute; poss&iacute;vel instalar um microfone internamente soldando os fios em pontos espec&iacute;ficos.</p>
<p>Depois da experi&ecirc;ncia que tive em <a target="_blank" href="http://www.gersondiesel.com.br/2009/05/28/troca-da-tela-digitalizadora-do-palm-tx/">trocar a tela digitalizadora do Palm</a> e ver algumas dicas na internet, resolvi instalar o microfone interno. <br />
&nbsp;<br />
Segui o passo-a-passo <a target="_blank" href="http://www.dominik.chmaj.net/mic/index2.php">deste site</a> (http://www.dominik.chmaj.net/mic/index2.php), e com um pouco de paci&ecirc;ncia, instalei o microfone sem muita dificuldade. <br />
&nbsp;<br />
A imagem abaixo mostra como ficou a instala&ccedil;&atilde;o interna:</p>
<p style="text-align: center;"><img height="422" width="420" border="1" align="middle" src="http://www.gersondiesel.com.br/wordpress/wp-content/uploads/image/palmTXmic.jpg" alt="" /></p>
<p style="text-align: left;">
&nbsp;<br />
Consegui o microfone de um MP3 de 512mb que estava guardado e eu n&atilde;o utilizava mais. O tamanho &eacute; ideal e cabe perfeitamente no pouco espa&ccedil;o que tem dentro do Palm.<br />
&nbsp;<br />
Para fios usei um peda&ccedil;o de fio de telefone:</p>
<ul>
<li>O fio branco (mic signal +) fica conectado no primeiro pino do conector (n&atilde;o o pino que fica sozinho). Como &eacute; o primeiro pino n&atilde;o &eacute; muito dif&iacute;cil soldar.</li>
<li>O fio azul (terra) ficou conectado no parafuso que prende o conector, que fica parafusado na placa metalica.Esta dica peguei <a href="http://www.youtube.com/watch?v=J2Yvj07pwKo" target="_blank">deste v&iacute;deo</a> no Youtube.</li>
</ul>
<p style="text-align: left;">Coloquei ainda uma fita isolante por cima dos fios e do microfone, pois eles ficam bem embaixo da bateria. Fiz tamb&eacute;m um furo bem pequeno na carca&ccedil;a com o ferro de solda para facillitar a passagem do som.<br />
&nbsp;<br />
O pr&oacute;ximo passo &eacute; testar algum recurso de voip no palm, como o <a target="_blank" href="http://www.hamptonsoftware.co.uk/articulation/index.php">Articulation</a>.<br />
&nbsp;<br />
<strong>Refer&ecirc;ncias </strong><br />
&nbsp;</p>
<ul>
<li>Palm TX Mic DIY <img src='http://www.gersondiesel.com.br/wordpress/wp-includes/images/smilies/icon_smile.gif' alt=':)' class='wp-smiley' /> - <a href="http://www.dominik.chmaj.net/mic/index2.php" target="_blank">http://www.dominik.chmaj.net/mic/index2.php</a></li>
<li>Palm TX com microfone interno (portugues) - <a href="http://www.youtube.com/watch?v=J2Yvj07pwKo" target="_blank">http://www.youtube.com/watch?v=J2Yvj07pwKo</a></li>
<li>Manual de desmontagem do Palm TX no site da Palm - <a target="_blank" href="http://www.palm.com/us/support/contact/environment/disassem_inst_TX.pdf">http://www.palm.com/us/support/contact/environment/disassem_inst_TX.pdf</a></li>
</ul>
<p>&nbsp;</p>



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		<title>Troca da tela digitalizadora do Palm TX</title>
		<link>http://www.gersondiesel.com.br/2009/05/28/troca-da-tela-digitalizadora-do-palm-tx/</link>
		<comments>http://www.gersondiesel.com.br/2009/05/28/troca-da-tela-digitalizadora-do-palm-tx/#comments</comments>
		<pubDate>Thu, 28 May 2009 23:41:28 +0000</pubDate>
		<dc:creator>Gerson Diesel</dc:creator>
		
		<category><![CDATA[Geral]]></category>

		<category><![CDATA[Palm]]></category>

		<category><![CDATA[Digitalizador]]></category>

		<category><![CDATA[Tela]]></category>

		<guid isPermaLink="false">http://www.gersondiesel.com.br/?p=171</guid>
		<description><![CDATA[Esta semana arrisquei: troquei a tela digitalizadora do meu Palm TX!
H&#225; tempos a tela original do meu Palm estava apresentando o conhecido problema de calibragem. No come&#231;o consegui contornar o problema com o PowerDigi do Dmitry, mas com o tempo o problema foi se agravando e n&#227;o tinha mais jeito. S&#243; trocando a tela.
Algumas assist&#234;ncias [...]]]></description>
			<content:encoded><![CDATA[<p>Esta semana arrisquei: troquei a tela digitalizadora do meu Palm TX!</p>
<p>H&aacute; tempos a tela original do meu Palm estava apresentando o conhecido problema de calibragem. No come&ccedil;o consegui contornar o problema com o<a target="_blank" href="http://www.palmpowerups.com/readarticle.php?article_id=5"> PowerDigi</a> do Dmitry, mas com o tempo o problema foi se agravando e n&atilde;o tinha mais jeito. S&oacute; trocando a tela.</p>
<p>Algumas assist&ecirc;ncias t&eacute;cnicas de Palm trocam por uma tela digitalizadora de pl&aacute;stico gen&eacute;rica. Experimentei uma e n&atilde;o gostei, pois elas s&atilde;o flex&iacute;veis demais (afundam com a stylus) e criam bolhas de gel (ou &oacute;leo) entre as camadas, ficando com a apar&ecirc;ncia manchada.</p>
<p>Descobri em alguns f&oacute;runs que existe &agrave; venda telas digitalizadoras de vidro, e que seriam muito superiores em qualidade. A Palm no come&ccedil;o fabricava seus dispositivos com este tipo de tela, mas devido a v&aacute;rios acidentes (palm no bolso de tr&aacute;s da cal&ccedil;a, etc), muitas telas acabavam se quebrando, ent&atilde;o resolveram fazer uma tela de acr&iacute;lico, mais dif&iacute;cil de quebrar.</p>
<p>Pois bem, ap&oacute;s ler muito sobre a tal tela digitalizadora de vidro, instru&ccedil;&otilde;es e v&iacute;deos de como troc&aacute;-la, acabei comprando uma do site <a target="_blank" href="http://www.pdaparts.com/">Pda parts</a>.</p>
<p>O produto chegou bem embalado, em uma caixa protegida com &quot;bolinhas&quot; de isopor.</p>
<p>Fiz a troca e me surpreendi. A tela possui uma qualidade incr&iacute;vel, e a sensibilidade com a stylus muito superior inclusive comparada &agrave; original. Aproveitei e a protegi com uma pel&iacute;cula antireflexiva. E aqui vai uma dica: Se a stylus n&atilde;o deslizar muito bem, passe uma camada bem fina de creme hidratante, e espalhe bem com um len&ccedil;o seco.</p>
<p>Vou deixar os v&iacute;deos mostrando como abrir o Palm TX e como trocar a tela:</p>
<p style="text-align: center;"><object width="425" height="344" type="application/x-shockwave-flash" data="http://www.youtube.com/v/PXJSnL60DlA&amp;hl=pt-br&amp;fs=1"><param value="true" name="allowFullScreen" /><param value="always" name="allowscriptaccess" /><param value="http://www.youtube.com/v/PXJSnL60DlA&amp;hl=pt-br&amp;fs=1" name="src" /><param value="true" name="allowfullscreen" /></object></p>
<p style="text-align: center;"><object width="425" height="344" type="application/x-shockwave-flash" data="http://www.youtube.com/v/SD7dHUJgMaI&amp;hl=pt-br&amp;fs=1"><param value="true" name="allowFullScreen" /><param value="always" name="allowscriptaccess" /><param value="http://www.youtube.com/v/SD7dHUJgMaI&amp;hl=pt-br&amp;fs=1" name="src" /><param value="true" name="allowfullscreen" /></object></p>
<p style="text-align: center;"><object width="425" height="344" type="application/x-shockwave-flash" data="http://www.youtube.com/v/psTq367kzrY&amp;hl=pt-br&amp;fs=1"><param value="true" name="allowFullScreen" /><param value="always" name="allowscriptaccess" /><param value="http://www.youtube.com/v/psTq367kzrY&amp;hl=pt-br&amp;fs=1" name="src" /><param value="true" name="allowfullscreen" /></object></p>
<p style="text-align: left;">N&atilde;o &eacute; necess&aacute;rio ser um t&eacute;cnico para fazer o reparo. Quem est&aacute; acostumado a montar e desmontar o seu computador, consegue trocar a tela numa boa. A pior parte &eacute; manter longe os fiapos de p&oacute; que insistem em pousar no LDC e na tela antes de colocar a pel&iacute;cula.</p>
<p style="text-align: left;">&nbsp;</p>



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		<title>Erro de segfault ao utilizar arquivo pam_mount.conf.xml de usuário</title>
		<link>http://www.gersondiesel.com.br/2009/05/11/erro-de-segfault-ao-utilizar-arquivo-pam_mountconfxml-de-usuario/</link>
		<comments>http://www.gersondiesel.com.br/2009/05/11/erro-de-segfault-ao-utilizar-arquivo-pam_mountconfxml-de-usuario/#comments</comments>
		<pubDate>Mon, 11 May 2009 23:54:57 +0000</pubDate>
		<dc:creator>Gerson Diesel</dc:creator>
		
		<category><![CDATA[Linux]]></category>

		<category><![CDATA[Pam]]></category>

		<guid isPermaLink="false">http://www.gersondiesel.com.br/?p=165</guid>
		<description><![CDATA[O libpam-mount permite que o usu&#225;rio monte as unidades de rede ao fazer o login, tanto no terminal quando no modo gr&#225;fico.  N&#227;o irei explicar como configurar o servi&#231;o ou o arquivo pam_mount.conf.xml, pois uma busca simples no Google fornece v&#225;rios sites ensinando como fazer isto.  Descreverei, portanto, sobre um problema encontrado na [...]]]></description>
			<content:encoded><![CDATA[<p>O libpam-mount permite que o usu&aacute;rio monte as unidades de rede ao fazer o login, tanto no terminal quando no modo gr&aacute;fico.  N&atilde;o irei explicar como configurar o servi&ccedil;o ou o arquivo pam_mount.conf.xml, pois uma busca simples no Google fornece v&aacute;rios sites ensinando como fazer isto.  Descreverei, portanto, sobre um problema encontrado na vers&atilde;o Lenny (est&aacute;vel) do Debian, e sua solu&ccedil;&atilde;o.  Ao utilizar as configura&ccedil;&otilde;es do arquivo pam_mount.conf.xml do usu&aacute;rio para montar um volume do tipo CIFS, ocorria o seguinte erro no login do usu&aacute;rio:</p>
<pre>
segfault at 0 ip b7ec29c8 sp bfadf9dc error 4 in libc-2.7.so[b7e50000+13d000]</pre>
<p>&#8230;e n&atilde;o deixava o usu&aacute;rio completar o login.  A vers&atilde;o do libpam-mount que est&aacute; no reposit&oacute;rio do Debian Lenny &eacute; a 0.44-1+lenny3, e para corrigir o problema, &eacute; necess&aacute;rio utilizar uma vers&atilde;o mais recente do libpam-mount. N&atilde;o encontrei uma vers&atilde;o compilada para Lenny, mesmo nos backports. Decidi ent&atilde;o baixar os fontes de uma vers&atilde;o mais atual e compilar.  Utilizei a vers&atilde;o 1.10 dispon&iacute;vel nos reposit&oacute;rios do debian (sid ou squeeze). Baixei o arquivo tar.gz, descompactei e executei o comando</p>
<pre>
./configure --prefix=/usr</pre>
<p>Como depend&ecirc;ncia, precisei instalar o pacote libhx-dev e libssl-dev (do Lenny mesmo).  Ap&oacute;s isto, foi s&oacute; executar <strong>make; make install</strong>.  A partir da&iacute; n&atilde;o ocorreu mais erro de segfault.  Acredito que este problema foi encontrado por poucas pessoas, pois n&atilde;o encontrei nenhuma solu&ccedil;&atilde;o na Internet, somente as reclama&ccedil;&otilde;es do erro.  Fica a&iacute;, portanto, uma solu&ccedil;&atilde;o para este problema.</p>
<p>&nbsp;</p>
<p><strong>Corre&ccedil;&atilde;o em 05/09/2009:</strong></p>
<ul>
<li>&Eacute; necess&aacute;rio a vers&atilde;o 2.2 da libHX. A vers&atilde;o do lenny &eacute; a 1.18. A&nbsp;vers&atilde;o 2.2 est&aacute; dispon&iacute;vel na p&aacute;gina do projeto libHX no Sourceforge. Basta baixar o source da vers&atilde;o 2.2 e compilar sem problemas.</li>
<li>Tamb&eacute;m &eacute; necess&aacute;rio o pacote libpam0g-dev, mas este est&aacute; no reposit&oacute;rio padr&atilde;o do Debian.</li>
</ul>



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		<title>Restringir a pesquisa do Samba/Winbind em domínios locais</title>
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		<comments>http://www.gersondiesel.com.br/2009/05/11/restringir-a-pesquisa-do-sambawinbind-em-dominios-locais/#comments</comments>
		<pubDate>Mon, 11 May 2009 23:24:36 +0000</pubDate>
		<dc:creator>Gerson Diesel</dc:creator>
		
		<category><![CDATA[Linux]]></category>

		<category><![CDATA[Centos]]></category>

		<category><![CDATA[Samba]]></category>

		<guid isPermaLink="false">http://www.gersondiesel.com.br/?p=159</guid>
		<description><![CDATA[Quando se utiliza o Samba/Winbind para autenticar usuários no AD em ambientes com uma floresta muito grande, a pesquisa pode demorar muito tempo, causando lentidão no serviço e reclamação por parte dos usuários.
Encontrei este cenário na empresa onde trabalho: Quando um usuário quer acessar uma pasta compartilhada em um servidor samba, este servidor procura as [...]]]></description>
			<content:encoded><![CDATA[<p>Quando se utiliza o Samba/Winbind para autenticar usuários no AD em ambientes com uma floresta muito grande, a pesquisa pode demorar muito tempo, causando lentidão no serviço e reclamação por parte dos usuários.</p>
<p>Encontrei este cenário na empresa onde trabalho: Quando um usuário quer acessar uma pasta compartilhada em um servidor samba, este servidor procura as credenciais deste usuário em todos os AD&#8217;s que possuem relação de confiança na rede inteira, ao invés de procurar somente no servidor AD do domínio que o usuário está cadastrado. Algumas vezes leva mais de um minuto para o usuário acessar o serviço de rede, causando frustração.</p>
<p>Obs.: O comando <strong><code>wbinfo -m</code></strong> lista todos os domínios que possuem relação de confiança na rede.</p>
<p>Quando utilizado o comando <strong><code>wbinfo -u</code></strong> para listar os usuários, aparece uma lista de todos os usuários de todos os domínios da rede. O mesmo acontece para listar os grupos (<strong><code>wbinfo -u</code></strong>).</p>
<p>O desejado é que o winbind busque as credenciais do usuário somente no AD do domínio no qual ele está cadastrado.</p>
<p>Procurei duas possíveis formas de corrigir o problema:</p>
<ol>
<li>Colocar o AD do domínio do usuário como primeiro na lista de pesquisa</li>
<li>Restringir o domínio de busca.</li>
</ol>
<p>A primeira opção não trouxe nenhum resultado satisfatório na web, nem nos arquivos de configuração do samba.</p>
<p>Contudo, uma opção no smb.conf chamava a atenção: a opção <strong><code>allow trusted domains</code></strong>. Segundo o man do smb.conf, esta opção serve para restringir a busca pelo usuário somente no domínio onde o serviço está rodando. Por padrão, esta opção é marcada como <strong>yes</strong>. Contudo, quando configurado para <strong>no</strong>, nada acontecia, e o comando <strong><code>wbinfo -m</code></strong> continuava listando todos os domínios.</p>
<p>Fazendo mais buscas, encontrei em alguns fórums que a opção <strong>allow trusted domains</strong> não fazia efeito em algumas versões do Samba.</p>
<p>O servidor da empresa possui instalado a distribuição Centos 5, com a versão 3.0.23 do Samba. Não gosto de utilizar pacotes fora do repositório oficial da distribuição, para não &#8220;quebrar&#8221; a distribuição e provocar algum &#8220;conflito&#8221; de pacotes.</p>
<p>Tive duas opções: baixar o fonte do samba e compilar ou então procurar algum repositório com binários do samba atualizados para o Centos 5.</p>
<p>Por uma felicidade, encontrei o repositório <a href="http://ftp.sernet.de/pub/samba/tested/centos/5/repodata/" target="_blank">SerNet Samba</a>, com binários atualizados do Samba, na versão 3.2.28.</p>
<p>Inseri o repositório na configuração do yum, removi a versão atual do Samba (importante), e instalei a versão do SerNet com suas dependências.</p>
<p>Após iniciar o serviço Samba e Winbind, o comando <strong><code>wbinfo -m </code></strong>passou a listar somente o domínio no qual o servidor estava instalado e configurado, e os comandos <strong><code>wbinfo -u </code></strong><code>e</code><strong><code> </code></strong><strong><code>wbinfo -g </code></strong>retornavam somente os usuários e grupos do domínio local. Os problemas de lentidão acabaram!</p>
<p><strong>Conclusão</strong></p>
<p>Se alguma opção em algum arquivo de configuração não funciona, procure a versão mais atual do programa. Para facilitar a vida do técnico, procure repositórios com pacotes já compilados para sua distribuição, e deixe os gerenciadores tipo Yum e Apt-get fazer o trabalho de resolver e baixar as dependências.</p>



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		<title>Análise do preço cobrado pelo SMS</title>
		<link>http://www.gersondiesel.com.br/2009/04/17/analise-do-preco-cobrado-pelo-sms/</link>
		<comments>http://www.gersondiesel.com.br/2009/04/17/analise-do-preco-cobrado-pelo-sms/#comments</comments>
		<pubDate>Fri, 17 Apr 2009 12:52:20 +0000</pubDate>
		<dc:creator>Gerson Diesel</dc:creator>
		
		<category><![CDATA[Geral]]></category>

		<category><![CDATA[Celular]]></category>

		<category><![CDATA[Dados]]></category>

		<category><![CDATA[SMS]]></category>

		<category><![CDATA[Valor]]></category>

		<guid isPermaLink="false">http://www.gersondiesel.com.br/?p=156</guid>
		<description><![CDATA[Um dia desses eu estive pensando a respeito do valor cobrado pela mensagem SMS nos celulares, e resolvi fazer uma compara&#231;&#227;o com o valor cobrado por um plano de pacote de dados.
Ap&#243;s fazer os c&#225;lculos, chegamos &#224; conclus&#227;o que o valor de R$0,30 cobrado por uma mensagem de SMS &#233; um absurdo!  Eu posso [...]]]></description>
			<content:encoded><![CDATA[<p>Um dia desses eu estive pensando a respeito do valor cobrado pela mensagem SMS nos celulares, e resolvi fazer uma compara&ccedil;&atilde;o com o valor cobrado por um plano de pacote de dados.</p>
<p>Ap&oacute;s fazer os c&aacute;lculos, chegamos &agrave; conclus&atilde;o que o valor de R$0,30 cobrado por uma mensagem de SMS &eacute; um absurdo!  Eu posso estar viajando na maionese, e se algu&eacute;m quiser opinar a respeito e provar o contr&aacute;rio, por favor, sinta-se &agrave; vontade.</p>
<p><strong>Vamos aos c&aacute;lculos:</strong>  Cada mensagem de SMS suporta 160 caracteres, o que equivale a 160 bytes. Tendo:  160bytes = R$0,30, quando custa 1megabyte de SMS?  Fazendo uma regra de 3 simples,</p>
<p>&nbsp;</p>
<pre>
0,30 - 160 bytes -&gt;&nbsp;1 mensagem de SMS equivale a 160 Bytes
  x  -  1.048.576 bytes -&gt; equivalente a 1 megabyte 

160x = 1.048.576 x 0,30
160x = 314.572,80
   x = 314.572,80 / 160
   x = 1.966,08</pre>
<p>&nbsp;</p>
<p>Ou seja, 1 megabyte de SMS custa o equivalente a R$1.966,5  Qual &eacute; o plano de pacote de dados que cobra um valor destes? Ser&aacute; que o valor de manuten&ccedil;&atilde;o dos equipamentos envolvidos em um processo de SMS &eacute; t&atilde;o alto?  Comparando ainda com um pacote de dados, um pacote 3G de 1Gb custa em torno de R$90,00. 1GB de SMS custa o absurdo valor de R$2.013.265,92 (isto mesmo, dois milh&otilde;es de reais).  Repito, se algu&eacute;m souber que estou equivocado, por favor deixe seu coment&aacute;rio.</p>
<p>Um abra&ccedil;o!</p>



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		<title>Carregador usb de celular nokia feito em casa</title>
		<link>http://www.gersondiesel.com.br/2009/04/01/carregador-usb-de-celular-nokia-feito-em-casa/</link>
		<comments>http://www.gersondiesel.com.br/2009/04/01/carregador-usb-de-celular-nokia-feito-em-casa/#comments</comments>
		<pubDate>Wed, 01 Apr 2009 17:14:00 +0000</pubDate>
		<dc:creator>Gerson Diesel</dc:creator>
		
		<category><![CDATA[Geral]]></category>

		<category><![CDATA[Carregador]]></category>

		<category><![CDATA[Celular]]></category>

		<category><![CDATA[Nokia]]></category>

		<guid isPermaLink="false">http://www.gersondiesel.com.br/2009/04/01/carregador-usb-de-celular-nokia-feito-em-casa/</guid>
		<description><![CDATA[Possuo um celular Nokia 5310 ExpressMusic, e uma das coisas que eu gostava nos celulares na Motorola que n&#227;o tem nos Nokia &#233; a possibilidade de carregar a bateria do celular plugando-o na USB do computador.  
Procurando por uma alternativa na Internet, encontrei alguns sites mostrando como fazer um carregador de bateria de celular [...]]]></description>
			<content:encoded><![CDATA[<p>Possuo um celular Nokia 5310 ExpressMusic, e uma das coisas que eu gostava nos celulares na Motorola que n&atilde;o tem nos Nokia &eacute; a possibilidade de carregar a bateria do celular plugando-o na USB do computador.  </p>
<p>Procurando por uma alternativa na Internet, encontrei alguns sites mostrando como fazer um carregador de bateria de celular Nokia atrav&eacute;s da USB do computador, pois ambos carregador e USB liberam a mesma voltagem e amperagem.  Um recarregador USB espec&iacute;fico e original da Nokia custa em torno de R$60,00. Achei muito caro e resolvi fazer um recarregador.  </p>
<p>Cabo usb eu j&aacute; tinha uns sobrando em casa. Me faltava um carregador Nokia para pegar o plugue que conecta no celular. Por sorte, um dia uma colega do trabalho trouxe um carregador que o sobrinho tinha arrebentado o cabo sem querer(!).</p>
<p>Como ela conseguiu comprar um carregador sobressalente de um colega, fiquei com o carregador arrebentado.  </p>
<p>N&atilde;o vou explicar como se faz o cabo, mas indico o site onde eu me guiei, com instru&ccedil;&otilde;es e imagens: <a href="http://www.mmcforums.net/forum/Home-Nokia-Usb-Charger-t14971.html">http://www.mmcforums.net/forum/Home-Nokia-Usb-Charger-t14971.html</a>  </p>
<p>Uma particularidade: o celular n&atilde;o avisa quando est&aacute; totalmente carregado, fica mostrando que est&aacute; carregando indefinidamente. Eu utilizo somente em caso de emerg&ecirc;ncia.</p>
<p>Obs.: N&atilde;o me responsabilizo por qualquer dano que possa causar no celular.</p>



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