Tris
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| posted on 20/1/11 at 01:28 PM |
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Cheap scope on ebay - ARM DSO - Anyone used?
Hi All,
While looking for a cheap little oscilloscope this afternoon to help out sorting some sensors on the car, i came across this snazzy looking thing -
ļ¼2Msps sampling rateļ¼ARM DSO Nanoļ¼Pocket Oscilloscope on eBay (end time 12-Feb-11 04:17:24 GMT)
Has anyone used one before ?
Cheers
Tris
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MikeRJ
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| posted on 20/1/11 at 01:53 PM |
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Yes. It's a cute gadget at a very reasonable price that packs a lot of functionality into a small space, but it's usefulness depnds on
what you want to do with it.
The low sample rate (and analog bandwidth) wouldn't be a problem for most automotive based work, but the triggering options are limited and only
having a single channel can range from an annoyance to making it useless for many applications.
It's an open source project and the firmware is continuously being improved, but
you can only do so much with software. I'm a bit suspicious about the 2MS/s claim on the eBay advert, this has been discussed on the forum as
it's technically possible (just), but testing showed various triggering problems and I'm not aware of any official firmware that supports
this.
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Tris
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| posted on 20/1/11 at 02:12 PM |
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Hi Mike,
Thanks for that - It looks like those on ebay are the older V1 model of the DSO. Is it worth paying the extra and getting the newer v2 model ?
All i am really after it for is to do basic automotive jobs, so nothing majorly quick.
Cheers
Tris
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MikeRJ
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| posted on 20/1/11 at 02:18 PM |
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Tghe V2 has a tougher case and a few circuit improvements, but probably not worth the extra cost increase from the one you linked to as that is an
exceptionally good price.
Actually I've just seen the shipping costs; that's just on the cheap side of the going rate for the V1. I have just noticed that
Seeedstudio have a quad channel version in development
with a proper high speed front end. Obviously more expensive, and pre-orders only at the moment, but I'm very tempted.
[Edited on 20/1/11 by MikeRJ]
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Tris
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| posted on 20/1/11 at 02:24 PM |
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Cool - one making itself to me for a whopping £47 
V2's were double that price.
Cheers
Tris
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theduck
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| posted on 20/1/11 at 07:37 PM |
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Stupid question, but what do you use these for?
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MikeRJ
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| posted on 20/1/11 at 08:01 PM |
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An oscilloscope draws a graph of voltage with respect to time, so you can observe electrical waveforms such as injectors, or wheel speed sensors etc.
A multimeter is pretty much useless measuring such signals as it tells you only the average voltage.
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