LOST MODLE detector RADAR STYLE!!?!?THIS ONE IS FOR U ENGINERS OUT THERE.....

[rumplestilskin]

HELLO . i ws driving in my car when my radar detector went off near a store ( the door sensors set it off) when it hit me . i have available to me for a reasonable price these exact same sensors. http://209.114.244.106/sonaindex.html it looks like the voltage is correct and every thing looks doable to me . i figure i can hook up a 9 volt battery up to these things and place it some where on the top of the wing or aney where on the exterior. and it will work until un pluged. and now here comes the good part .........to find the downed model we just hook up our avrage evey day radar detector ( automotive type ) to a battery and folow the signal until it gets stronger and head in that dieection until u find it.... soooo what do u think ? let me know ......
i will be purchacing 1 of thse things for testing ,weight etc. etc.

[Mr.RC-CAM]

The link you gave was to some ultrasonic devices. They are acoustical (sound) and are not expected to trigger an automotive radar detector. Also they are using high audio frequencies (>50Khz) which are very directional and easily attenuated by the environment.

RC-CAM

[rumplestilskin]

so i guess the next question is where can i get the good ones and do u think this idea has potential

[Miami Mike]

I gave your idea quite a bit of thought, but finally concluded that it would be hard to beat a simple noisemaker. If you can hear your lost model then you ought to be able to find it.

[rumplestilskin]

whell i thought about that to .... i was thinking about a post i read last night that fcc rules make it illegal for said device to create harmfull interferance blah blah. so when the idea hit me about this . it looked like a way to stick it to the fcc. and find your model at the same time..plus it is cheep and utilizes someting most of us have in our cars . i will continue pondering the benefits. considering the posts and ideas of my fello modelers

[rumplestilskin]

btw i love the caption below your avitar......cause u live in florida.. i get it lol lol

[jeffs555]

http://www.autodoorsystems.com/MicrowaveSensor/presenced14-1.htm

This is the type of door opener device that sets off your radar detector. Note the weight of 2 lbs.

[Superweirdash]

it looked like a way to stick it to the fcc. and find your model at the same time..
I've always wanted to show the FCC who's boss... :confused:

[rumplestilskin]

ummm....all i would need is the sensor part..not the case or the fancy matal stuff..

[rumplestilskin]

take a look at this guys.


X-Band Radar: 10.5 - 10.55 GHz
Dating from the 1950s, X-band radar is the easiest to detect because of its lower frequency and higher power output. Depending on terrain, temperature and humidity, X-band radar can be detected from a distance of 2 to 4 miles, X-band signals: Garage door openers, microwave intrusion alarms, microwave towers, and other high-tech equipment can fool a radar detector into giving off an X-band alert.


YES THATS 2-4 MILES.......and did u read the part about garage door openers..(i hope theay mean the remote portion...)

[jeffs555]

I think you need to forget about using a radar detector to find your lost model. X-band signals are very directional, and do not penetrate buildings or trees well at all. X-band is basically line of sight, if you can't see your model, the likelyhood is you wouldn't detect it with X-band. The reason supermarkets trigger your detector are because they have transmitters pointed outward so they can detect people coming in, and the doors generally face the street. Yes you can detect a radar gun pointed at you from 2-4 miles away, but only in direct line of sight. If there are trees or hills in between, then the signal won't be detected. If the gun is not pointed in your general direction, you won't detect it at all unless the beam bounces off another car or some other metal object. Also, I have never seen a garage door opener that works in the X-Band. The vast majority operate between 300 and 400mhz.

[rumplestilskin]

oh well sounded like fun

[Chamkeeper]

WOW, I worked for the company that builds those sensors for a few years, about 15 years ago!!. But, the D14-1 is Ultrasonic. A D7 is X-Band Radar, about 10.25 GHz, they also made a K24, (K-something) that operated on K band radar, about 24 Ghz, IIRC.

You can probably get the little radar heads from the company cheap, (I'll look for a link), but the receive diode will be bad. A D7 is mounted in a big cast aluminum chassis, not needed, a good sized circuit board is in there too as well as a heavy cast waveguide antenna. All you really need is the head with the transmit diode, and regulated 8vdc, to set your radar detector off. Pulsing the signal to go off every half 5 seconds for 1 second would save a lot of battery. I think you will be unhappy with the directional ability of your radar deyector. The K-Band unit is pretty darn small tranmits and a weak enough level, especially without the antenna, to slip past FCC regs.

Do not expect to see this signal for miles. MAYBE, 1/2 a mile if conditions are good and your radar detector is a good unit. The power out is just not there.

[Miami Mike]

To learn more, try a search for "gunplexer" (http://www.google.com/search?sourceid=navclient&ie=UTF-8&q=gunnplexer).

[Chamkeeper]

I was trying sooooooo hard to remember that name....old age I guess. Yes, a Gunn diode does the transmitting.

Thanks, Mike!

[richard tunstal]

can't remember the numbers but gunn diodes need about 7 volts to oscillate and slurp a
a fair bit of current.
i remember a magazine cover "microwaves from a mustard tin"
this used a free running cavity(aka mustard tin) oscillator
at about 5ghz.using a uhf(shf?) transistor
but 150mhz to 220mhz works well enough
(but 433 has smaller aerials)

[Chamkeeper]

Yes ours used 8vdc, and would draw a pretty good bit if current, I am thinking 50mA at least.

[kenbene]

check this out http://www.timit.com/

[Miami Mike]

That's just a fancy stopwatch with "Radar" in its name. It doesn't have anything to do with real radar.

[kfong]

Yes, it's funny what people try to pass on as some new fangled gizmo. What a hoot. Timing a ball to get the speed, how novel ;)

Kin

http://www.embeddedtronics.com/

[kfong]

You know the low tech sound approach works, but why not make it more sophisticated and light off a smoke trail provided they are safe enough not to catch things on fire. This will give a visible smoke that would be useful in thick dense brush and can be seen for quite a distance on a calm day.

Kin

http://www.embeddedtronics.com/

[richard tunstal]

i mentioned in post 16" microwaves from a mustard-tin"
i've just seen in thread"wanted to clock my planes..........."
that the radar gun is based on a free-running(?) transistor bean-can oscillator
at ~2.4 ghz............food for experiment???????????
but one of the consumer electronic modules (eg video senders etc)on this frequency
would probably yield more fruit!

[Luap]

Timing a ball to get the speed, how novel
I wish I was as smart as these three people.
They used a disimulated scanner in a mobile phone to measure the speed and probable finishing point of a roulette ball at the Ritz casino. They made 2million Euro - and what I heard is they were just set free including the gain as the Casino (and no casino at this moment) has rules forbidding such acts.
So any ideas how one could go about getting the speed of a ball?
http://www.online-casinos-czar.com/online-casino-news/2004-3/22/online-casinos-casino-news-2004-3-22_6.htm

[Jim Ridgway]

How about a noisemaker that will beep every so often instead of a constant sound? Would the battery last longer in this set up?

[rumplestilskin]

ummm so maby is is do able....??????

[Mr.RC-CAM]

How about a noisemaker that will beep every so often instead of a constant sound? Would the battery last longer in this set up?
That is one of the tricks that LoMA uses. Details: http://www.rcgroups.com/forums/showthread.php?t=278905&highlight=loma

RC-CAM