Do you have any pointers to websites? I could have really used a simple
scope that could measure 200Hz today...trying to figure out whether or
not a zero crossing detector is really working with only a DMM isn't
easy.

*sigh* to have an employer to buy me nice toys...

Josh :)

"Gennette, Bruce" wrote:
>
> If you don't need DC you can use an op amp as a feed to a PC sound card with
> the correct levels - there are lots of virtual oscilloscope programs
> available and most hobby electronics companies have a cheap design available
> for home construction.
>
> If you do need just very basic DC you can use a few comparitors into various
> AC generators in front of the sound card pre amp -
> 1] Several oscillators - 0V gives a low tone, 3V gives an intermediate and 5
> V a high tone (audible as well as visible on the PC screen.
> 2] A low amplitude, highish frequency tone (appears as a thick line on
> oscilloscope program) can be mixed with the output of preset amplifiers (The
> line is level shifted).
>
> The first is often best for PICs, especially if you monitor the audio, you
> can quickly get to recognize Lo, Hi, rail-to-rail pulses, rail-to-mid
> pulses, etc.
>
> Bye.
>
> -----Original Message-----
> From: Dave Dribin [mailto:dave-ml@DRIBIN.ORG]
> Sent: 05 December 2001 07:14
> To: PICLIST@MITVMA.MIT.EDU
> Subject: [BUY]: Cheap, beginner's scope
>
> Hello,
>
> I'm looking at getting an oscilloscope for myself, but I don't want to
> spend a ton.  Plus, I won't be using it that much.  I'd file it under
> the "nice to have" category.  I doubt I will be doing any high speed
> circuits or anything.  I'll probably use it mostly on digital logical
> and computer peripheral interfaces (PS/2, etc.).  Could anyone
> recommend a good beginners scope around the $300-$500 range?  I don't
> mind looking at used stuff on eBay, but I don't know enough to not get
> screwed.
>
> Bitscope looked interesting, too.  Has anyone had experiences with it?
>
>   http://www.bitscope.com/
>
> Thanks,
>
> -Dave
>
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