Looking for a Doppler Radar to connect to stamp
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Hi everyone,
Does anyone know of a Doppler radar that is fairly simple to connect to
a BS2 (or any stamp in the BS2 family)? I will be using it to measure
the speed of a car (10-75 MPH). Accuracy to within several MPH is
sufficient. Cheaper is preferable. Thanks in advance for any info.
-Alex
Does anyone know of a Doppler radar that is fairly simple to connect to
a BS2 (or any stamp in the BS2 family)? I will be using it to measure
the speed of a car (10-75 MPH). Accuracy to within several MPH is
sufficient. Cheaper is preferable. Thanks in advance for any info.
-Alex
Comments
port. Or, You could use a pitching speed gun. It may be cheaper.
Original Message
From: "Alex Sulkowski" <asulkowski@a...>
To: <basicstamps@yahoogroups.com>
Sent: Friday, January 23, 2004 12:00 PM
Subject: [noparse][[/noparse]basicstamps] Looking for a Doppler Radar to connect to stamp
> Hi everyone,
> Does anyone know of a Doppler radar that is fairly simple to connect to
> a BS2 (or any stamp in the BS2 family)? I will be using it to measure
> the speed of a car (10-75 MPH). Accuracy to within several MPH is
> sufficient. Cheaper is preferable. Thanks in advance for any info.
>
> -Alex
>
>
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Original Message
From: "Geoffrey Lewis" <geoffreylewis@c...>
To: <basicstamps@yahoogroups.com>
Sent: Friday, January 23, 2004 1:06 PM
Subject: Re: [noparse][[/noparse]basicstamps] Looking for a Doppler Radar to connect to stamp
> I have used the Jugs Cordless Radar Gun with Port. It's about This has a
> port. Or, You could use a pitching speed gun. It may be cheaper.
>
>
Original Message
> From: "Alex Sulkowski" <asulkowski@a...>
> To: <basicstamps@yahoogroups.com>
> Sent: Friday, January 23, 2004 12:00 PM
> Subject: [noparse][[/noparse]basicstamps] Looking for a Doppler Radar to connect to stamp
>
>
> > Hi everyone,
> > Does anyone know of a Doppler radar that is fairly simple to connect to
> > a BS2 (or any stamp in the BS2 family)? I will be using it to measure
> > the speed of a car (10-75 MPH). Accuracy to within several MPH is
> > sufficient. Cheaper is preferable. Thanks in advance for any info.
> >
> > -Alex
> >
> >
> > To UNSUBSCRIBE, just send mail to:
> > basicstamps-unsubscribe@yahoogroups.com
> > from the same email address that you subscribed. Text in the Subject
and
> Body of the message will be ignored.
> >
> >
> > Yahoo! Groups Links
> >
> > To visit your group on the web, go to:
> > http://groups.yahoo.com/group/basicstamps/
> >
> > To unsubscribe from this group, send an email to:
> > basicstamps-unsubscribe@yahoogroups.com
> >
> > Your use of Yahoo! Groups is subject to:
> > http://docs.yahoo.com/info/terms/
> >
> >
>
>
> To UNSUBSCRIBE, just send mail to:
> basicstamps-unsubscribe@yahoogroups.com
> from the same email address that you subscribed. Text in the Subject and
Body of the message will be ignored.
>
>
> Yahoo! Groups Links
>
> To visit your group on the web, go to:
> http://groups.yahoo.com/group/basicstamps/
>
> To unsubscribe from this group, send an email to:
> basicstamps-unsubscribe@yahoogroups.com
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>
>
doppler radar manufactured by SIEMENS. I have found it at
www.conrad.com (search for radar) cost about 40 euros.
I would be delighted if you could manage to use this sensor and give
me some information about.
Michael
I used the KMY24 on a 12 bit ADC to measure the intensity of RAIN. I
never got wet anymore, so it was a great succes :-).
Fact is that you have two oscillating outputs on the KMY24 which vary
when objects move towards the sensor or away from it. Essential is
the fase shift between the outputs, "+" when moving towards and "-"
when moving away. So you can measure direction of movement from the
fase of the signals and speed from frequency.
I have not been doing very much with this little RADAR thing but I
might start again in the near future.
So,
Let's keep in touch!
Regards,
Klaus
--- In basicstamps@yahoogroups.com, "magzi3" <magzi@p...> wrote:
> I think that a suitable sensor is SIEMENS' KMY24. It is exactly a
> doppler radar manufactured by SIEMENS. I have found it at
> www.conrad.com (search for radar) cost about 40 euros.
> I would be delighted if you could manage to use this sensor and
give
> me some information about.
>
> Michael
similar).
When I travel around on the open sea in my sailing boat (alone), I
sometimes have to sleep. In daylight it's no problem to sleep, but
at night it could be hard to see my little boat.
Could a simple radar connected to a stamp operate a summer or
something to wake me up, if a boat is closing in on me? Or perhaps a
sensitive microphone in the water, connected to a stamp could hear
other boats and worn me. But a mic in saltwater is not a smart
solution comparing a simple radar connected to the stamp?
Stein
--- In basicstamps@yahoogroups.com, "klausdejong" <klausdejong@x>
wrote:
> Hi Michael,
>
> I used the KMY24 on a 12 bit ADC to measure the intensity of RAIN.
I
> never got wet anymore, so it was a great succes :-).
>
> Fact is that you have two oscillating outputs on the KMY24 which
vary
> when objects move towards the sensor or away from it. Essential is
> the fase shift between the outputs, "+" when moving towards and "-
"
> when moving away. So you can measure direction of movement from
the
> fase of the signals and speed from frequency.
>
> I have not been doing very much with this little RADAR thing but I
> might start again in the near future.
>
> So,
>
> Let's keep in touch!
>
> Regards,
>
> Klaus
>
>
>
> --- In basicstamps@yahoogroups.com, "magzi3" <magzi@p...> wrote:
> > I think that a suitable sensor is SIEMENS' KMY24. It is exactly
a
> > doppler radar manufactured by SIEMENS. I have found it at
> > www.conrad.com (search for radar) cost about 40 euros.
> > I would be delighted if you could manage to use this sensor and
> give
> > me some information about.
> >
> > Michael
I used the KMY24 on a 12 bit ADC to measure the intensity of RAIN. I
never got wet anymore, so it was a great succes :-).
Fact is that you have two oscillating outputs on the KMY24 which vary
when objects move towards the sensor or away from it. Essential is
the fase shift between the outputs, "+" when moving towards and "-"
when moving away. So you can measure direction of movement from the
fase of the signals and speed from frequency.
I have not been doing very much with this little RADAR thing but I
might start again in the near future.
So,
Let's keep in touch!
Regards,
Klaus
--- In basicstamps@yahoogroups.com, "magzi3" <magzi@p...> wrote:
> I think that a suitable sensor is SIEMENS' KMY24. It is exactly a
> doppler radar manufactured by SIEMENS. I have found it at
> www.conrad.com (search for radar) cost about 40 euros.
> I would be delighted if you could manage to use this sensor and
give
> me some information about.
>
> Michael
Worked great. Makes great spooky sounds. But getting speed (reliable info)
out of them can be tricky. I eventually acquired an old police radar. They
way that they do it, is to look for 5 consecutive identical speeds. Then
that is declared the real speed. The real police radar (old x band unit)
has only lied to me twice in several years of running it around town
(legally on amateur radio bands, I diddled the diode down to within the
legal band<G>). At those times, it was receiving massive reflections from
large trucks as I was starting off at a red light.
An old door opener should be obtainable from a flea market or hamfest very
cheaply. Then capacitively connect the output of the diode to a low noise
amplifier. A standard audio amplifier will work ok for your needs I
suspect. If you build an amplifier with over a gain of 100, build it in
separate pieces. Reason is with gains over 100, you can have problems with
feedback. So, I build my amplifiers in gain blocks of 100. As I remember,
two of those in series would give you more than enough sensitivity. Then
use a LM386 for an output stage.
I had problems with alternator noise in the truck, so ran it often from a
separate battery instead of the cigarette lighter. I built a differential
analog input to my first op amp amplifier, which worked reasonably well, but
not as well as a laser trimmed one from digikey. I still had some whine.
This is because direct conversion receivers (like this) are extremely
sensitive to power supply noise.
I can send you a schematic of what I built if you wish (email direct). PDF.
I just looked. It's buried somewhere too. Not where I expected to find it.
I have documentation for the police unit somewhere and can scan and pdf if
you want to email me direct. But will have to really hunt for that<G>.
The reason for the 5 identical speeds, is because each and every surface of
the item being measured reflects a wave which is counted. For something
like a baseball, the measurement is simpler.
Original Message
From: Alex Sulkowski [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=kPc-at0tRvUkWPNjCG4-c6chVCqYEvf1lbVsZ-snU_SSRt3eazdyr8OTk-wjd203BaTppBs_yaU7Lmq6cqBJQF651Qdy]asulkowski@a...[/url
Sent: Friday, January 23, 2004 12:00 PM
To: basicstamps@yahoogroups.com
Subject: [noparse][[/noparse]basicstamps] Looking for a Doppler Radar to connect to stamp
Hi everyone,
Does anyone know of a Doppler radar that is fairly simple to connect to a
BS2 (or any stamp in the BS2 family)? I will be using it to measure the
speed of a car (10-75 MPH). Accuracy to within several MPH is sufficient.
Cheaper is preferable. Thanks in advance for any info.
-Alex
To UNSUBSCRIBE, just send mail to:
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