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DPRG: BOUNCE dprglist@dprg.org: Non-member submission from ["slugmusk ." <slugmusk@hotmail.com>]

Subject: DPRG: BOUNCE dprglist@dprg.org: Non-member submission from ["slugmusk ." <slugmusk@hotmail.com>]
From: Jim Brown brownjim at airmail.net
Date: Fri Sep 17 15:26:55 CDT 1999

>Date: Fri, 17 Sep 1999 14:09:33 -0500
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>Subject: BOUNCE dprglist at dprg.org:    Non-member submission from
["slugmusk ." <slugmusk at hotmail.com>]   
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>From: "slugmusk ." <slugmusk at hotmail.com>
>To: dprglist at dprg.org
>Subject: Re: DPRG: Multiplexing sonars
>Date: Fri, 17 Sep 1999 14:08:57 CDT
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>
>Ed Koffeman said something to the effect of:
>
>>Reed relays are fairly small.
>
>The high voltage needed for the transducer should not be a problem going 
>through a reed relay, but the lead to the tranducer is usually shielded 
>coax. Would this shielding need to be maintained through the relays?
>
>>It would still be cheaper than multiple sonar boards, and they
>>probably don't operate very reliably at the same time anyway.
>
>Cheaper, better powerconservation and good point about simultaneous 
>operation...
>
>I envision a subsystem in which a PIC or BS2 is dedicated to ranging. 
>Perhaps it would output a serial $00 to serve as a synch character, the 
>select a transducer, get a range, output a distance byte via serial and loop 
>to another transducer. Once all the transducers had been used, loop the 
>whole process. The host would grab the bytes and put them in the appropriate 
>slots on a situation map.
>
>Sinply changing the software could make it a multichannel proximity alarm 
>that could perhaps replace a similar bank/ring of IR proximity sensors.
>
>I suppose that there would need to be some compensation for the propogation 
>time of the relay...
>
>Stuff like this makes me wanna tear back into my bot today!!
>
>Robert
>
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