How to use Ultrasonic Transducer Transmitter Receiver

Using Arduino General Electronics
1

Hi
I am new to Arduino and electronics. I am currently playing with the Arduino Duemilanove. Want to use the Ultrasonic Transducer, Transmitter/Receiver CAT.NO: AU5550 to determine distance of object to switch on a a led when object is within a specified range.

Can any one help with some sample code?
Thank you kindly.
Cinco5

2

Cinco5:
Want to use the Ultrasonic Transducer, Transmitter/Receiver CAT.NO: AU5550

What catalogue? We can't read minds very well here.
Do you have a link?

3

Have you got a driver schematic?
Designing a driver and receiver from scratch is not a beginner's project.
Have you got a 'scope?

4

What he said ^.

I think I found them - Jaycar AU5550. They're a pair of closed transducers, and as AWOL points out, they need 40kHz transmitter and receiver circuitry, not just code. The closed type transducers aren't particularly sensitive, either. I have pair of those exact transducers from Jaycar sitting here, but have never got around to building circuits to try them, and just went with a HC-SR04 module for a recent project.

You'd do far better to consider the common HC-SR04 module, or a Maxbotix module. You can get HC-SR04 modules from eBay very cheaply, or a quick search is sure to turn up a source for the Maxbotix modules.
With those types, you really do only need code. :slight_smile:

Edit: If you're in Australia, here's a nice cheap HC-SR04:-
1PCS HC-SR04 Ultrasonic Module Distance Measuring Transducer Sensor NewT

5

Thank you kindly OldSteve. You have the correct link.

6

I will buy and try the one you have indicated. So the two I bought is of no use then.

7

I'm afraid so - don't worry, you're not the first to make that mistake, and I doubt you'll be the last.

They're tricky beasts to design for - to make the transmitter work, you have to make it shout (you'll notice it is rated up to 140 V) to get the best range, but the received echo may well be a few microvolts.

8

If you really want to check out a design for those transducers, and don't mind buying a back-copy of an old magazine, the Feb 2000 edition of 'Silicon Chip' magazine has a circuit - "Ultrasonic Parking Radar".
(Suitable for up to about 1 metre only.)

Here's the 'teaser':- Ultrasonic Parking Radar

And you can order the back-issue on this page, but it's between $9 and $10 depending on where you live:- http://www.siliconchip.com.au/Shop/2
(All the more reason to buy a nice, cheap HC-SR04.)

9

Brilliant thanks. I guess now pain no gain.