<div dir="ltr"><div>Why not use those little 433mhz data transmitters? They are $10 each, right? They have limited range, right? Hook to a 16f84 for $6. Seems that any PCB shop could make the PCB that held the ceramic resonator, 16f84 and the 433mhz transmitter in groups of 5 to 10 and we'd cut them apart at home. In other words, you'd order them 10 at a time from a place like <a href="http://pcbexpress.com">pcbexpress.com</a> If I were doing this (and I may), I'd use SMT so there were no pricklers sticking thru the board... would make a nice name tag to pin on your shirt. It would run off coin cells so it would be flat. TX would be randomized since there's no receiver on the badges. Maybe a push button for forcing a squawk.</div>
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<div>Wes<br><br></div>
<div class="gmail_quote">On Sun, Jul 13, 2008 at 11:05 AM, Bob Bruninga <<a href="mailto:bruninga@usna.edu">bruninga@usna.edu</a>> wrote:<br>
<blockquote class="gmail_quote" style="PADDING-LEFT: 1ex; MARGIN: 0px 0px 0px 0.8ex; BORDER-LEFT: #ccc 1px solid">> "The Texas Instrument HF Antenna Cookbook."<br>> The designs are for RFID at 13.56 MHz.<br><br>I seriously want to see the ARRL/Ham radio invest in RFID for ham radio ops. Embed the chip in the ARRL name tag.<br>
Then we can have gateways to APRS...<br><br>Put one at each venu or checkpoint or clubhouse, or whatever.<br>Range should be about 100 feet...<br><br>Bob,WB4APR<br><br><br><br>_______________________________________________<br>
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</blockquote></div><br><br clear="all"><br>-- <br>Wes<br>---<br>Where there's silence, there is no Hope. </div>