Arm DSO Nano and family
#1
Posted 02 November 2011 - 06:45 PM
Does anyone know who make them?
Anyone got experience with them?
So far my only other Cheep Chinese made product (superdpad 3) has been faithfully working, so I'm wondering if the dso nanos there worth buying.
EDIT: Sorry forgot to add a product link-
ARS Nano V2 Mini Pocket Osciliscope
"Maybe it's because you're a crap programmer"
#3
Posted 03 November 2011 - 03:36 AM
#4
Posted 03 November 2011 - 04:44 AM
I bought that scope at the beginning of 2011, but once I had in my hands, I realized it is much like "I wish but I can't".
Briefly some faults:
- I measured the actual bandwidth, and it's 2-3MHz: it means a typical SPI signal is yet distorted;
- the side buttons are not comfortable for a normal usage;
- the scope is too tiny, and you have many problems to handle it;
- the menu system is cumbersome: after two usages, you'll throw the scope out of the window;
- many bugs.
http://www.seeedstud...php?f=22&t=1944
For less than 100$ could be considerable, for 200$ it does not (IMHO).
For a decent scope to play with *duino, you should consider at least a 30MHz, two-channel scope. I guess you can find it for 300-400$. If you dig around the used scopes, you may find even for much less.
Hope it helps.
Cheers
#5
Posted 03 November 2011 - 09:39 AM
- I measured the actual bandwidth, and it's 2-3MHz: it means a typical SPI signal is yet distorted;
I'm not an expert on scopes (just a user ...), but doesn't that mean that the infos on http://iteadstudio.c...products_id=355 are very off? (It claims to have an analog bandwidth of 72Mhz and up to 72MS/s (well, it is odd that those numbers are the same) - that is an order of magnitude off ...)
-- H.L. Mencken, "What I Believe"
#6
Posted 03 November 2011 - 12:28 PM
#7
Posted 03 November 2011 - 12:34 PM
Stefan, take a look at the link I posted above in this thread. The Seeedstudio forum thread about the bandwidth is pretty long, but there are lots of funny things.I'm not an expert on scopes (just a user ...), but doesn't that mean that the infos on http://iteadstudio.c...products_id=355 are very off? (It claims to have an analog bandwidth of 72Mhz and up to 72MS/s (well, it is odd that those numbers are the same) - that is an order of magnitude off ...)
A logic analyzer is surely cheaper than a scope, but does not allow to perform lots of measurements.Don't forget that a logic analyser will be cheaper still. If you're just looking at the content rather than the quality of a digital signal such as SPI then it does a great job. I'm happy with my Scanalogic device and I know other like the Saleae.
As usual, until everything goes fine the LA is enough, when something is not working the scope is mandatory.
Cheers
#8
Posted 03 November 2011 - 01:14 PM
#9
Posted 04 November 2011 - 08:05 PM
"Maybe it's because you're a crap programmer"
#10
Posted 04 November 2011 - 09:11 PM
-- H.L. Mencken, "What I Believe"
#11
Posted 05 November 2011 - 07:53 AM
"Maybe it's because you're a crap programmer"
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