To do this you need a set of directional antennas. They can be rather large even at short wave lengths. If you are determined to do it a set of ferrite rod antennas might be made to work. That is what are used in pocket radios so they are quite small.
Regards. Max. K 4 O D S. Email: [EMAIL PROTECTED] Transistor site http://www.funwithtransistors.net Vacuum tube site: http://www.funwithtubes.net Music site: http://www.maxsmusicplace.com To subscribe to the fun with tubes group send an email to, [EMAIL PROTECTED] ----- Original Message ----- From: "Lenny McHugh" <[EMAIL PROTECTED]> To: <[email protected]> Sent: Sunday, November 25, 2007 5:01 PM Subject: Re: [BlindHandyMan] radio direction finding project > How about the very low tech bell? I know of one person who clips a very > small cowbell on the dog when he is not working. Or to get a little higher > tech a remote control alarm of some type. I don't think that the radio > receivers would work. The receivers would be too close together to > accurately identify the direction. > ----- Original Message ----- > From: "David Sexton" <[EMAIL PROTECTED]> > To: <[email protected]> > Sent: Sunday, November 25, 2007 5:49 PM > Subject: [BlindHandyMan] radio direction finding project > > > I'm working on a project for a friend. She wants to be able to train dogs > off leash and she has to be able to know where the dog is. > My idea is a belt with eight tactile feedback units spaced equally around > a > belt and A radio transmitter for the dog to wear. > Some sort of direction finding antanna. > Maybe each of the eight units could be receivers and a micro processor > could > determine which one is receiving the stronger signal. > Any ideas at all? > How could I go about developing something like this. What are good sources > for parts, etc. > David > > > [Non-text portions of this message have been removed] > > > > To listen to the show archives go to link > http://acbradio.org/handyman.html > or > ftp://ftp.acbradio.org/acbradio-archives/handyman/ > > The Pod Cast address for the Blind Handy Man Show is. > http://www.acbradio.org/news/xml/podcast.php?pgm=saturday > > Visit The Blind Handy Man Files Page To Review Contributions From Various > List Members At The Following address: > http://www.jaws-users.com/handyman/ > > Visit the archives page at the following address > http://www.mail-archive.com/[email protected]/ > > If you would like to join the Blind Computing list, then visit the > following > address for more information: > http://jaws-users.com/mailman/listinfo/blind-computing_jaws-users.com > > For a complete list of email commands pertaining to the Blind Handy Man > list > just send a blank message to: > [EMAIL PROTECTED] > Yahoo! Groups Links > > > > > > > To listen to the show archives go to link > http://acbradio.org/handyman.html > or > ftp://ftp.acbradio.org/acbradio-archives/handyman/ > > The Pod Cast address for the Blind Handy Man Show is. > http://www.acbradio.org/news/xml/podcast.php?pgm=saturday > > Visit The Blind Handy Man Files Page To Review Contributions From Various > List Members At The Following address: > http://www.jaws-users.com/handyman/ > > Visit the archives page at the following address > http://www.mail-archive.com/[email protected]/ > > If you would like to join the Blind Computing list, then visit the > following address for more information: > http://jaws-users.com/mailman/listinfo/blind-computing_jaws-users.com > > For a complete list of email commands pertaining to the Blind Handy Man > list just send a blank message to: > [EMAIL PROTECTED] > Yahoo! Groups Links > > > > > > > -- > No virus found in this incoming message. > Checked by AVG Free Edition. > Version: 7.5.503 / Virus Database: 269.16.7/1151 - Release Date: > 11/25/2007 4:24 PM > >
