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<html> <head> <title>RFID-Bulletin Board: Help!, Mr. Ho at 1/22/2002 05:28</title> <!-- Anfang Header --><!-- Ende Header --> </head> <BODY BGCOLOR="#fffcf4"><!-- Anfang BeitragsseitenKopf --><!-- Ende BeitragsseitenKopf --><!-- AnfangBanner --><!-- EndeBanner --> <blockquote> <center> <h1>Help!</h1> </center><!-- Anfang BeitragsNavigationsLeisteOben --><!-- AnfangLinie --><center><p><HR></p></center><!-- EndeLinie --><center><P><B>[ <a href="../index.htm">RFID-Bulletin Board</a> ]</B></P></center><!-- AnfangLinie --><center><p><HR></p></center><!-- EndeLinie --><!-- Ende BeitragsNavigationsLeisteOben --><p>Written by <a href="mailto:ah_lung@sinaman.com">Mr. Ho</a> at 22 Jan 2002 05:28:50:<p>I have a RFID module from my professor that is an taiwan OEM product.<br>I have to make an interface to the module and a PALM/Visor handheld. But I found some problems:<br>1. The module is form neotec semiconductors Ltd. (www.neotec.com.tw). But on the module I found no RFID ICs form this company (it should be NT8801).Is it possible to receive ID tags without IC?<br>2. Even without the IC, once I present the tag card on the receiver, I found the signal drop from ground to -8V at the RS232 output pin, is it reasonable? ( I know RS232 o/p should be +/- 15V??)<br>3. I also measured the anttena and the waveform from the coil two side are different ( one is modulated sine wave and the other is a square wave with pitch at the corner). Is it the correct pattern for common practice? If not, How can I measure the waveform correctly?<p>Thanks for any help from you.<p>Ho.<br><br><br><!-- AnfangLinie --><center><p><HR></p></center><!-- EndeLinie --><form method=POST action="../wwwforum.cgi?formular"><input type=hidden name="followup" value="530"><input type=hidden name="origname" value="Mr. Ho"><input type=hidden name="origemail" value="ah_lung@sinaman.com"><input type=hidden name="origsubject" value="Help!"><input type=hidden name="origdate" value="22 Jan 2002 05:28:50"><input type=hidden name="subject" value="Re: Help!"><input type="submit" name="abschicken" value="Write an answer"> <br><!-- AnfangLinie --><center><p><HR></p></center><!-- EndeLinie --><p><a name="followups"><B>List of answers:</B></a><br><ul><!--insert: 530--></ul><!--end: 530--><!-- Anfang BeitragsNavigationsLeisteUnten --><!-- AnfangLinie --><center><p><HR></p></center><!-- EndeLinie --><center><P><B>[ <a href="../index.htm">RFID-Bulletin Board</a> ]</B></P></center><!-- AnfangLinie --><center><p><HR></p></center><!-- EndeLinie --><!-- Ende BeitragsNavigationsLeisteUnten --></blockquote> <!-- Anfang BeitragsseitenFuss --><!-- Ende BeitragsseitenFuss --></body></html>⌨️ 快捷键说明
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