[Fwd: Re: SV: [sdiy] scope recommendations wanted (or even "wtb: scope in england")]

[Seb Francis]

I think this was meant for the list not me ...

-------- Original Message --------
Subject: 	Re: SV: [sdiy] scope recommendations wanted (or even "wtb: 
scope in england")
Date: 	Thu, 22 Sep 2005 11:31:35 +0200
From: 	Michael Atzert <michael.atzert at gmail.com>
Reply-To: 	michael.atzert at gmail.com
To: 	Seb Francis <seb at burnit.co.uk>
References: 	<8c.2fa8ac64.3061aa7f at aol.com> <4330669E.9000508 at burnit.co.uk>



Seb Francis schrieb:

>
> WeAreAs1 at aol.com wrote:
>
>> Unfortunately, soundcard-based scopes will only measure AC signals.  
>> This is because all soundcards are AC-coupled at the inputs (with 
>> coupling capacitors, which block all incoming DC).
>>  
>>
>
> Of course this is something that can be fixed by modifying the 
> soundcard and adding a small external circuit..
> http://www.qsl.net/om3cph/sb/dcwithsb.htm
>
> In any case when using a soundcard you should at least have an 
> external buffer circuit since the impedance of a soundcard is very low 
> compared to a scope and will tend to influence what you are trying to 
> measure.
>
> Seb
>
>
>
If you don't want to "edit" your Soundcard by soldering, the botscope 
could be interesting: www.elby-designs.com

I did not try it, but it looks pretty interesting.

Otherwise you have to pay loads of money for a real oscilloscope...

regards

michael

PS:


You can find a real nice freeware software-scope here: 
http://digilander.libero.it/hsoft/  (Beside of the fact that the page is 
in italian language, the prog is english) *ggg*

--
http://www.digital-horizon.de
Große deutschsprachige Synth-DIY-Link-Datenbank
Intelligente Suche auch nach gebräuchlichen Abkürzungen (Poti, EQ)