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'[PICLIST] =%5BPIC%5D%3A Speedtrap warning device u'
2001\11\03@111409 by APRS Mobiel

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2001\11\03@121357 by M. Adam Davis

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What is it that you plan on doing with the GPS?  How is the GPS supposed
to warn you of a speedtrap?

-Adam

APRS Mobiel wrote:

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2001\11\03@140152 by Nick Ray

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The system uses a database of known speed trap locations and alerts you when
the GPS position nears one of them. There are one or 2 commercial systems
availiable here in the UK, but I don't know accurate their data is.

Useless for mobile traps though..

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2001\11\03@154326 by Russell McMahon

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> What is it that you plan on doing with the GPS?  How is the GPS supposed
> to warn you of a speedtrap?

One method is to use GPS to derive speed across ground (taking account also
for elevation) and ensure that your velocity vector never exceeds the local
speed limit. You could also map speed limit boundaries to determine the
appropriate change points.

Generally intelligent application of a speedometer, brain and eyes works
well enough already. It's a cheap solution (as most systems are already
equipped with all the components) and it can provide an almost 100% success
rate against speeding, let alone speeding tickets. From what I've heard it's
FAR more successful at achieving a lack of speeding tickets than the results
reported by people using RADAR / LIDAR detectors.



   RM :-)

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2001\11\04@015941 by artstar

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In other words, what you're saying is "drive slow". What needs to be
realised here, without getting into an argument about who's right and
who's wrong, is that people will go over the speed limit - be it a
little or a lot.

So, for those who want such a device, help them out for the sake of what
this PIClist is about, rather than preaching about what is deemed
appropriate motorist behaviour. Fair enough?

Adios,
LarZ

---------------  TAMA - The Strongest Name in Drums  ---------------

{Original Message removed}

2001\11\04@114156 by APRS Mobiel

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Dear Adam,

Thanks for reply.
The idea is using a PIC and extra RAM to store all
known speedtrap GPS locations into RAM.
(here in NL around 2000)

When driving on the road toward the known location/GPS
coordinates, the warning device sounds his alarm.

Personaly think could be very simple pice of device
with just 1 PIC, piezo and some LED blink.

Bertus.


--- "M. Adam Davis" <spam_OUTadampicTakeThisOuTspamUBASICS.COM> wrote:
{Quote hidden}

=====
------------- http://clik.to/aprsmobiel ----------------
TRACKERS, GPS ONTVANGERS, APRS TRANCEIVER en ZELFBOUW.
>>>>>>>>>HEEFT U VRAGEN OF (BOUW)PROBLEMEN ?<<<<<<<<<<<<
  AMATEUR BOUWKITS, BESTELLEN EN PRIJZEN STAAN OP:
   http://www.geocities.com/aprsmobiel/PRIJS.HTM
 Please also visit my Kreidler and Zuendapp pagina at:
-------------- http://clik.to/zundapp ------------------

__________________________________________________
Do You Yahoo!?
Find a job, post your resume.
http://careers.yahoo.com

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