How to Build Sonar detector

That depends on how much of it you want to do. Virtually all stages of such
a device can be purchased as subsystems or kits.

At its core, ultrasonic ranging is simply creating a sound pulse at a
frequency beyond that which humans can hear, and waiting for some sort of
echo. It really is that *easy*.

As the saying goes, the devil is in the details, and this is where kits and
subsystems come in.

Creating an ultrasonic pulse and being able to pick up its echo is a bit
complex on the analog electronics aspect, but the digital stuff is easy.

Hello Kit,




You did not indicate if the medium is earth, water or air? This will
effect the type of transducer used and the power behind it.



Only you could answer a question about your building skills.


I am only guessing, but below is where I would start.

Your project is complicated, this may be why webpages are minimal.  It
is one project that has always fascinated me. If you make it follow up
with a webpage. Let me know your link. Several ideas can spin off this
one.

For the original designer like yourself projects like this are always
much more expensive and time intensive than anticipated.

Don't re-invent the wheel, Modify It!

*****
Home Depot  - 50 Ft.. Sonic Laser Tape  $29.95

Sonic laser tape with laser targeting to accurately locate measurement
end point. 50 Ft. range, 1 In. resolution. Accurate and fast - a great
estimating tool. Menu driven, with intuitive function selection -
units, memory and mode. Sonic wave and Laser Targeting technology
accurately indicates distance with the touch of a button.

http://www.homedepot.com/prel80/HDUS/EN_US/shop_cart/pg_print_product.jsp?CNTTYPE=PROD_META&CNTKEY=shop_cart/pg_print_product.jsp&BV_SessionID=@@@@0795030385.1142271779@@@@&BV_EngineID=ccdcaddhffhhmdkcgelceffdfgidgjm.0&MID ˜76&prod_id7078
*****

I being a garage hobbyist should mention that if you are in the USA
"Big Lots" discount stores currently have 25' sonic tapes in my local
store for 8 dollars that might be worth studying and for components.


In the end it is cheaper to buy this Sonar Detector already built.(-;

Especially if it is for fishing!


RS Theremin

    * * *
Christopher

Temecula CA.USA
http://www.oldtemecula.com

Go here http://www.robot-electronics.co.uk/htm/srf08tech.shtml  to read an
excellent technical description, including schematics, for a sonar ranger.

Dave

Christopher wrote:

http://www.homedepot.com/prel80/HDUS/EN_US/shop_cart/pg_print_product.jsp?CNTTYPE=PROD_META&CNTKEY=shop_cart/pg_print_product.jsp&BV_SessionID=@@@@0795030385.1142271779@@@@&BV_EngineID=ccdcaddhffhhmdkcgelceffdfgidgjm.0&MID ˜76&prod_id7078

I build one from scratch, with some new technics, take a look here,
and dont forget to take a look at the magic piece of foam
http://oase.uci.kun.nl/~mientki/pic/projects/rapid_prototyping/rapid_prototyping_us_ranger.html

Stef Mientki

Hi

I remember coming across a project to hack an old Polaroid camera into a
SONAR.( I got one here in Australia for $15 off ebay) Do a Google search for
"hacking a polaroid sonar camera", I got 25000 hits. Seattle Robotics group
has an article too, I think, from memory. This particular version does draw
a fair bit of current from what others have said.

The transducers themselves can be bought very inexpensively from electronics
stores now if you don't want to hack a Polaroid camera..

Cheers

|-]

Dale