Re: Ultrasonic Sensor

Dibyendu wrote:

Hi,

I am trying to build an ultrasonic sensor module to detect and measure
the distance of an object, and got some problem :-)

Problem:
1. Not sure whether the transmitter send sound or not.
2. Not sure, Receiver work properly or not.
3. Circuit and code was not tested.

The configuration of my board is:

a) AT89C52. Microcontroller.
b) XTL freq. 11.0592 mhz.
b) 40 KHz ultrasonic transmitter and receiver.

Is the transmitter and receiver a pair of devices or just a single TX/RX
unit?

If they are a pair you may need to check that you are using the transmitter
for transmitting and the receiver for receiving.

You should also try and do one bit at a time. This link:-

http://www.eetasia.com/ARTICLES/2002MAR/2002MAR08_RFD_DA_AN.PDF

may help you. If you build just the interface portions you should be able to
see if they are working by scoping around the pins.

Once you have working TX and RX circuits you can then add the micro and
software and work on what ails those.

--
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Paul E. Bennett ....................<email://peb@xxxxxxxxxxxxxxxxxx>
Forth based HIDECS Consultancy .....<http://www.amleth.demon.co.uk/>
Mob: +44 (0)7811-639972
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