Oscilloscope software

senderj · 13th June 2006, 04:10 AM

There are some oscilloscope software that turns a PC (with sound card) into a scope. But I am wondering how it measures the ripple of a HT PSU that can be up to +/-200V. Can it be fed into the sound card?!? Even a 12V filament PS is questionable. Anybody can share their experience with such software?

http://www.electronics-lab.com/downloads/pc/index.html

rpapps · 13th June 2006, 05:28 AM

Hi Senderj
I have something which would help you with this.
If you want it, please email me.
Cheers
Rob

preiter · 13th June 2006, 07:03 PM

The oscilloscope programs which do not use external hardware are using your PC sound card for input.

The input voltage range on the input is very limited (<1v usually, I believe) and would need to be attenuated with an external circuit.

Also they usually only get up to 20k bandwidth.

Bazukaz · 13th June 2006, 07:09 PM

You can divide the +-200V voltage with , lets say , 100K : 250 Ohms resistor divider(400 : 1).
However , the sound card scope is not good. It has a limited frequency response.It won't show DC. Square and triangle wave is not shown correclty as well.

Regards,
Lukas.

excetara2 · 14th June 2006, 07:28 AM

That is a pretty cool little piece of software. How much does it cost?

senderj · 14th June 2006, 02:49 PM

Rob,

How can I send email to you?

rpapps · 15th June 2006, 01:02 AM

Click on my name and you'll be taken to my profile page. From there you can email me. Be sure to include your email adress so I can send to you. I would have posted it but it's too large for the forum.
Cheers
Rob

senderj · 15th June 2006, 02:45 PM

Rob,

Couldn't success. Got this message "Sorry! That user has specified that they do not wish to receive emails through this board. If you still wish to send an email to this user, please contact the administrator and they may be able to help."

Tried with my own name, still the same.

Any idea?

rpapps · 16th June 2006, 01:07 AM

Hi Senderj
Funnily enough, I get the same message about you.
Is there a problem with the system?
Try rpappsATtpgDOTcomDOTau.
Cheers
Rob

AndrewT · 16th June 2006, 04:41 PM

Hi,
you have all got your Email switched off.

The Email logo appears at the bottom of any message you post when Email is switched on.

BTW it's working I just checked mine. It arrived in under 30seconds.

13th June 2006, 04:10 AM	#1
senderj diyAudio Member Join Date: Feb 2006 Location: Hong Kong	Oscilloscope software There are some oscilloscope software that turns a PC (with sound card) into a scope. But I am wondering how it measures the ripple of a HT PSU that can be up to +/-200V. Can it be fed into the sound card?!? Even a 12V filament PS is questionable. Anybody can share their experience with such software? http://www.electronics-lab.com/downloads/pc/index.html

16th June 2006, 04:41 PM	#10
AndrewT diyAudio Member Join Date: Jul 2004 Location: Scottish Borders	Hi, you have all got your Email switched off. The Email logo appears at the bottom of any message you post when Email is switched on. BTW it's working I just checked mine. It arrived in under 30seconds. __________________ regards Andrew T.

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13th June 2006, 05:28 AM	#2
rpapps diyAudio Member Join Date: Jul 2004 Location: nowhere of interest	Hi Senderj I have something which would help you with this. If you want it, please email me. Cheers Rob

13th June 2006, 07:03 PM	#3
preiter diyAudio Member Join Date: May 2006	The oscilloscope programs which do not use external hardware are using your PC sound card for input. The input voltage range on the input is very limited (<1v usually, I believe) and would need to be attenuated with an external circuit. Also they usually only get up to 20k bandwidth.

13th June 2006, 07:09 PM	#4
Bazukaz diyAudio Member Join Date: Nov 2005 Location: Vilnius	You can divide the +-200V voltage with , lets say , 100K : 250 Ohms resistor divider(400 : 1). However , the sound card scope is not good. It has a limited frequency response.It won't show DC. Square and triangle wave is not shown correclty as well. Regards, Lukas.

14th June 2006, 07:28 AM	#5
excetara2 diyAudio Member Join Date: Jun 2006	That is a pretty cool little piece of software. How much does it cost?

14th June 2006, 02:49 PM	#6
senderj diyAudio Member Join Date: Feb 2006 Location: Hong Kong	Rob, How can I send email to you?

15th June 2006, 01:02 AM	#7
rpapps diyAudio Member Join Date: Jul 2004 Location: nowhere of interest	Click on my name and you'll be taken to my profile page. From there you can email me. Be sure to include your email adress so I can send to you. I would have posted it but it's too large for the forum. Cheers Rob

15th June 2006, 02:45 PM	#8
senderj diyAudio Member Join Date: Feb 2006 Location: Hong Kong	Rob, Couldn't success. Got this message "Sorry! That user has specified that they do not wish to receive emails through this board. If you still wish to send an email to this user, please contact the administrator and they may be able to help." Tried with my own name, still the same. Any idea?

16th June 2006, 01:07 AM	#9
rpapps diyAudio Member Join Date: Jul 2004 Location: nowhere of interest	Hi Senderj Funnily enough, I get the same message about you. Is there a problem with the system? Try rpappsATtpgDOTcomDOTau. Cheers Rob

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