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Andy Neil
03/03/12 06:12
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#186380 - You really, really need to get an oscilloscope!
Responding to: ???'s previous message
Raju M said:
I have no oscilloscope to check the response of TX & RX.

You really, really need to get an oscilloscope!!

Trying to do electronics without an oscilloscope is like trying to do carpentry without a saw!

when powered up, beep sound was coming from transmitter (so i am thinking that TX is working)

You should not be able to hear 40kHz as a "beep"!!

"ultrasonic" means beyond the range of hearing - so, if you can hear it, there's something wrong!

In the receiver section i am using audio amplifier

Again, "ultrasonic" means beyond the range of audio - are you sure this "audio" amplifier is correctly designed for 40kHz?

How can i check the response of the receiver circuit using multimeter.

You can't!

Multimeters are useless for any sort of rapidly-varying signal.

Raju M said:

Did you mean to link to these pages:

Note that they are pages, not images - so you cannot link them as images!

To link as images, you need to go to the page, and find the URL of the image itself; eg, in MS-IE, by right-clicking the image and choosing 'Properties'

And always use the 'Preview' to confirm that your post is correct before you post it!

List of 18 messages in thread
ultrasonic receiver problem      Raju M      03/03/12 05:40      
   You really, really need to get an oscilloscope!      Andy Neil      03/03/12 06:12      
      The joys of working blind        Kalpak Dabir      03/03/12 20:21      
   The same way ...      Joseph Hebert      03/04/12 08:07      
      How do you fry an egg with a sledge hammer?      Andy Neil      03/04/12 12:25      
         First?      Michael Karas      03/04/12 23:05      
            First, and always.      Joseph Hebert      03/07/12 21:29      
   If you cannot afford a scope...        Kai Klaas      03/05/12 06:38      
      This is a kind of dip meter      KONSTANTINOS L. ANGELIS      03/06/12 04:24      
      you are still in trouble      Erik Malund      03/06/12 07:31      
      On-line simulator      Joseph Hebert      03/06/12 10:26      
      You need to save up for a scope!      Andy Neil      03/07/12 00:33      
         Microcontroller      Per Westermark      03/07/12 00:51      
         re You need to save up for a scope!      Erik Malund      03/07/12 07:21      
            Yes, perhaps that's the solution      Richard Erlacher      03/07/12 08:56      
            %$#@! -- it happened again!      Richard Erlacher      03/07/12 08:56      
   Multimeters can't troubleshoot everything      Andy Neil      03/23/12 15:41      
      Yes, and you need ...      Richard Erlacher      03/24/12 08:35      

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