Group order

[萨克森气势]

Is anybody interested to get on this?

http://www.seeedstudio.com/depot/dso-nano-v2-p-681.html?cPath=174

I read good reviews and think it could help me and probably you a lot too.

I would buy one but if somebody want to have it too maybe we can place a group order and ask Seeed for discount.

If you know any other products like this please share your knowledge so we can find the best for our needs.

It's not an urgent request, so please take your time to think about it.

~Lutz

[hao jiang]

Hi Lutz,

I am no expert in DSO, but 200kHz bandwidth is kind of a turn down, and the probe in the picture just doesn't look good.

A initial check on taobao shows there are 3 tier's of DSOs,

1. Similar to this nano, named DSO201 cost around 380rmb +-30rmb , 200k bandwidth, decent probe, should be exact same hardware like nano.
http://item.taobao.com/item.htm?id=10780777575&initiative_id=itemz_20120329

2. Similar to DSO quad of seeed studio, cost around 950rmb +-30rmb, around 2~5M bandwidth, 2 channels
http://item.taobao.com/item.htm?id=10781533805&initiative_id=staobaoz_20120329

3. Not portable low end, 2krmb+- 400rmb, 20M~100M bandwidth, not portable

I would certainly to have something like option 2, but i guess option 1 is good enough still as i don't think i will often go over 200khz

Regards
Edward

[Min Lin Hsieh]

I'm going to Shenzhen next week and will visit SeeedStudio, I can bring your order back to Shanghai so you can save for the shipping ;-)

[萨克森气势]

Thanks Edward & Min Lin,

I will check the taobao links as soon as I am at home. I am not sticking on the SeedStudio one....but I think on taobao the first link is the same than theirs but V1....the one from Seeedstudio is V2 now.

Yep, the probes are not looking very reliable but frankly...for what I need it it should be ok.

The point is that I want a small, portable one since my workspace is not that big and sometimes I need to move from there to my computer desk...not good with a bulky scope.

Anyway, who would like to order one too, either the Taobao one or the Seeedstudio one so in case we could ask Min Lin to bring it from Shenzhen.

~Lutz

2012/3/29 Min Lin Hsieh <mlh...@gmail.com>

[ourst...@gmail.com]

Lutz

 

these really have low bandwidth + the warnings on the Seeed page show quite a few more limitations.

 

I am a big fan of both Seeed & DangerousPrototypes but not for this device. Unless you have some very particular needs, I would go with a commercial device, for a bit more if you go second hand and not too much more for a Rigol etc.

 

Even at DangerousPrototypes (which is where teh DSO came from) forums, there is some fairly negative comments and the thing I really notice is that they do not promote it at all - maybe there was some issue with the partner (I forgot the other site) that they created this with.

 

See http://dangerousprototypes.com/forum/viewtopic.php?t=2959&p=29145 for one example.

 

Spencer

 

2012/3/29 萨克森气势 <sachse...@gmail.com>

[Kirk Lau]

Personally i would pick an USB Scope over this.
As many people already pointed out, 200KHz is rather slow.
(actually i have question, when it said "Analog bandwidth" how did
they define that, the Nyquist frequency? the sampling rate? or
actually give a reasonable display of a smooth curve with a 10x
sampling rate [as in, each period of the 200kHz signal with at least
10 points. or sampling at 2M at least]?)

the probe is fine... for low frequency like that.

but IMO, unless i want the portability, i probably won't pick this
one. (say...for example... showing of how the light intensity
actually varying as the sine wave of the AC current at 60/50Hz ... IN
A RESTAURANT WHILE HAVING ROMANTIC DINNER!)..

on the other hand, it is indeed very cool to tell people i have an
oscilloscope in my pocket! so i might consider that actually... :D

there are quite a few USB scope that are around this price range which
"MIGHT" give better performance.
(and just did a search on taobao. a china brand FULL SIZE real scope
can be as low as 1300rmb... Hmmmmmmmm)

that's my 2 cents opinion on this.

-Kirk

2012/3/29 ourst...@gmail.com <ourst...@gmail.com>:

[zano...@gmail.com]

Yes
I agree that 200KHz of analog bandwith is useless.
It means that it only can show about 20-40kHz signal, with many detail info lost.

On Thu, 29 Mar 2012 15:39:01 +0800
hao jiang <edwa...@gmail.com> wrote:

> Hi Lutz,
>
> I am no expert in DSO, but 200kHz bandwidth is kind of a turn down,
> and the probe in the picture just doesn't look good.
>
> A initial check on taobao shows there are 3 tier's of DSOs,
>
> 1. Similar to this nano, named DSO201 cost around 380rmb +-30rmb ,
> 200k bandwidth, decent probe, should be exact same hardware like nano.
> http://item.taobao.com/item.htm?id=10780777575&initiative_id=itemz_20120329
>
> 2. Similar to DSO quad of seeed studio, cost around 950rmb +-30rmb,
> around 2~5M bandwidth, 2 channels
> http://item.taobao.com/item.htm?id=10781533805&initiative_id=staobaoz_20120329
>
> 3. Not portable low end, 2krmb+- 400rmb, 20M~100M bandwidth, not
> portable
>
> I would certainly to have something like option 2, but i guess option
> 1 is good enough still as i don't think i will often go over 200khz
>
> Regards
> Edward
>

> On Thu, Mar 29, 2012 at 12:33 PM, ���ɭ���� <sachse...@gmail.com>

> wrote:
>
> > Is anybody interested to get on this?
> > http://www.seeedstudio.com/depot/dso-nano-v2-p-681.html?cPath=174
> > I read good reviews and think it could help me and probably you a
> > lot too.
> >
> > I would buy one but if somebody want to have it too maybe we can
> > place a group order and ask Seeed for discount.
> >
> > If you know any other products like this please share your
> > knowledge so we can find the best for our needs.
> > It's not an urgent request, so please take your time to think about
> > it.
> >
> > ~Lutz
> >

--
Zano.zhao <Zano...@gmail.com>

[Paul Adams]

since we're on the same topic-ish, i'm looking at buying a standard
signal generator for the space and not sure to pay the extra for 5mhz or
get the 2mhz, are the features in these fine? i'm trying not to go
highend since there are way too many buttons but not sure if this will
be useful since it's on the low end of the space:

http://www.uni-trend.com/UTG9005C.html - 5mhz or 2mhz
http://www.uni-trend.com/UTG9002C.html

On Thu Mar 29 16:53:22 2012, Zano...@gmail.com wrote:
>
> Yes
> I agree that 200KHz of analog bandwith is useless.
> It means that it only can show about 20-40kHz signal, with many detail
> info lost.
>
>
> On Thu, 29 Mar 2012 15:39:01 +0800
> hao jiang<edwa...@gmail.com> wrote:
>
>>
>> Hi Lutz,
>>
>> I am no expert in DSO, but 200kHz bandwidth is kind of a turn down,
>> and the probe in the picture just doesn't look good.
>>
>> A initial check on taobao shows there are 3 tier's of DSOs,
>>
>> 1. Similar to this nano, named DSO201 cost around 380rmb +-30rmb ,
>> 200k bandwidth, decent probe, should be exact same hardware like nano.
>> http://item.taobao.com/item.htm?id=10780777575&initiative_id=itemz_20120329
>>
>> 2. Similar to DSO quad of seeed studio, cost around 950rmb +-30rmb,
>> around 2~5M bandwidth, 2 channels
>> http://item.taobao.com/item.htm?id=10781533805&initiative_id=staobaoz_20120329
>>
>> 3. Not portable low end, 2krmb+- 400rmb, 20M~100M bandwidth, not
>> portable
>>
>> I would certainly to have something like option 2, but i guess option
>> 1 is good enough still as i don't think i will often go over 200khz
>>
>> Regards
>> Edward
>>

>> On Thu, Mar 29, 2012 at 12:33 PM, 萨克森气势<sachse...@gmail.com>

[萨克森气势]

Well, that's good that we talk about that.

- I do not want a scope for USB because I want to be able to use it without a computer

- bandwidth...how much do I need for my robot/electronic projects? I doubt that I want to measure the 2.4GHz waves of my Wi-Fi...but who knows :-)

- pocket size is a very big PLUS....for the romantic dinner exactly the right accessory ;-)

Some more input (good or bad) is welcome.

BUUUUT, nobody answered my question regarding to the group order hahaha... Well, I guess we can talk about this when we found the right device ;-)

~Lutz

2012/3/29 Kirk Lau <kirk...@gmail.com>

[Paul Adams]

sean from the canadian hackerspace got a portable one that does some
insane amount of stuff, i think shyu introduced him to it, english and
chinese.. around double the cost though if i remember

On Thu Mar 29 17:03:01 2012, 萨克森气势 wrote:
> Well, that's good that we talk about that.
>
> - I do not want a scope for USB because I want to be able to use it
> without a computer
> - bandwidth...how much do I need for my robot/electronic projects? I
> doubt that I want to measure the 2.4GHz waves of my Wi-Fi...but who
> knows :-)
> - pocket size is a very big PLUS....for the romantic dinner exactly
> the right accessory ;-)
>
> Some more input (good or bad) is welcome.
>
> BUUUUT, nobody answered my question regarding to the group order
> hahaha... Well, I guess we can talk about this when we found the right
> device ;-)
>
> ~Lutz
>
>

> 2012/3/29 Kirk Lau <kirk...@gmail.com <mailto:kirk...@gmail.com>>

>
> Personally i would pick an USB Scope over this.
> As many people already pointed out, 200KHz is rather slow.
> (actually i have question, when it said "Analog bandwidth" how did
> they define that, the Nyquist frequency? the sampling rate? or
> actually give a reasonable display of a smooth curve with a 10x
> sampling rate [as in, each period of the 200kHz signal with at least
> 10 points. or sampling at 2M at least]?)
>
> the probe is fine... for low frequency like that.
>
> but IMO, unless i want the portability, i probably won't pick this
> one. (say...for example... showing of how the light intensity
> actually varying as the sine wave of the AC current at 60/50Hz ... IN
> A RESTAURANT WHILE HAVING ROMANTIC DINNER!)..
>
> on the other hand, it is indeed very cool to tell people i have an
> oscilloscope in my pocket! so i might consider that actually... :D
>
> there are quite a few USB scope that are around this price range which
> "MIGHT" give better performance.
> (and just did a search on taobao. a china brand FULL SIZE real scope
> can be as low as 1300rmb... Hmmmmmmmm)
>
> that's my 2 cents opinion on this.
>
> -Kirk
>
>

> 2012/3/29 ourst...@gmail.com <mailto:ourst...@gmail.com>
> <ourst...@gmail.com <mailto:ourst...@gmail.com>>:

> > Lutz
> >
> > these really have low bandwidth + the warnings on the Seeed page
> show quite
> > a few more limitations.
> >
> > I am a big fan of both Seeed & DangerousPrototypes but not for
> this device.
> > Unless you have some very particular needs, I would go with a
> commercial
> > device, for a bit more if you go second hand and not too much
> more for a
> > Rigol etc.
> >
> > Even at DangerousPrototypes (which is where teh DSO came from)
> forums, there
> > is some fairly negative comments and the thing I really notice
> is that they
> > do not promote it at all - maybe there was some issue with the
> partner (I
> > forgot the other site) that they created this with.
> >
> > See
> http://dangerousprototypes.com/forum/viewtopic.php?t=2959&p=29145
> <http://dangerousprototypes.com/forum/viewtopic.php?t=2959&p=29145> for
> > one example.
> >
> > Spencer
> >
> >
> >
> > 2012/3/29 萨克森气势 <sachse...@gmail.com

> <mailto:sachse...@gmail.com>>

> >>
> >> Thanks Edward & Min Lin,
> >>
> >> I will check the taobao links as soon as I am at home. I am not
> sticking
> >> on the SeedStudio one....but I think on taobao the first link
> is the same
> >> than theirs but V1....the one from Seeedstudio is V2 now.
> >>
> >> Yep, the probes are not looking very reliable but frankly...for
> what I
> >> need it it should be ok.
> >>
> >> The point is that I want a small, portable one since my
> workspace is not
> >> that big and sometimes I need to move from there to my computer
> desk...not
> >> good with a bulky scope.
> >>
> >> Anyway, who would like to order one too, either the Taobao one
> or the
> >> Seeedstudio one so in case we could ask Min Lin to bring it
> from Shenzhen.
> >>
> >> ~Lutz
> >>
> >>
> >>
> >> 2012/3/29 Min Lin Hsieh <mlh...@gmail.com

> <mailto:mlh...@gmail.com>>

[Kirk Lau]

actually.. Lutz,
what are u planning to use for..

2012/3/29 Paul Adams <niha...@gmail.com>:

[Jonas S Karlsson (☯大鱼)]

Well. I guess one gets what one pay for, so for paying less like $49 usd for atxmega http://www.gabotronics.com/development-boards/xmega-xprotolab.htm

M maybe that's worth it...

[何琪辰]

前两天刚买了一个，这个东西的能力真的很有限。。。
只能测直流信号，信号的直流分量大一点，就看不出波形了。。。
看视频感觉这种示波器好点
http://item.taobao.com/item.htm?id=13022376003

[Kirk Lau]

Hey!! this one looks good..
100MSa/s,
even assume 10 point per wave, it still give you 10MHz.
8 bit resolution is a bit of let down... but... oh well.. can't ask
for too much for a hand held one..

[萨克森气势]

Well, all in Chinese there but I trust Kirk ;-)

lets see what still comes up 

~Lutz

2012/3/29 Kirk Lau <kirk...@gmail.com>

Hey!! this one looks good..

[Kirk Lau]

direct google translate copy and paste of the "spec"

Oscilloscope performance
Bandwidth (-3dB) 25MHz
Sampling rate of the largest real-time sample rate: 100MSa / S
Channel 1
Coupling AC, DC
Rise time of <17.5 nS,
Input impedance 1MΩ, ≤ 20pF
Maximum input voltage 1x CAT III 300 VAC, 10x, 100x CAT III 600 VAC,
Vertical resolution 8bit
Vertical sensitivity 50mV/div-20V/div Note 1
Horizontal resolution 10nS/div
Level the sensitivity 10nS/div -5S/div Note 2
Record length 0.1K / channel
Automatic trigger mode, rising edge, falling edge

Multimeter performance
Full scale reading of 6000 counts
Enter the maximum input voltage of 600 Vrms CAT II, CAT III, 300 Vrms of
Conduction measurement 600Ω profile measurements, is less than 25Ω buzzer alarm
Measurement Diode test circuit open circuit or diode drop greater than
2V, the LCD will display the overload test voltage drop is less than
0.25V, the alarm buzzer.
Capacitance measurement 6.000nF-6mF 7 files
Resistance measurement 600.0Ω-60.00MΩ 6 files
Voltage measurement 6V-600V 3 files

2012/3/30 萨克森气势 <sachse...@gmail.com>:

[hao jiang]

Great tool he qichen has posted, for me it has only 2 draw backs:

1. Size, amost 20cm long, not as portable as the other choices.
2. Not coloured display... not cool enough to show off the girls at a fine dine table, if you take it out in the restaurant, people would mistake you for a technician fixing the table light.

But, there is always no perfect choice right? given a fixed price, there is always gonna be some trade off.


Anyone has any experience with the DSO203 (AKA DSO quad)?
http://item.taobao.com/item.htm?id=9655742431&ref=http%3A%2F%2Fsearch8.taobao.com%2Fsearch%3Fq%3DDSO203%26commend%3Dall%26ssid%3Ds5-e%26pid%3Dmm_14507416_2297358_8935934&ali_trackid=2:mm_14507416_2297358_8935934,0:1333072666_3z4_928855502

Sample rate up to 72Msa/s, 2 channels.

Reviews needed.

Regards
Edward

[Ricky Ng-Adam]

+cc: Sean

Hey Sean, what's the portable oscilloscope you bought again? Are you happy with it?

2012/3/30 hao jiang <edwa...@gmail.com>

--
伍思力 | Ricky Ng-Adam | http://xinchejian.com | (+86) 186-2126-2521

[Ricky Ng-Adam]

Just realized that Sean forgot to "Reply all"... What was the brand and model number again Sean?

2012/3/30 Sean Boyce, Mr <sean....@mail.mcgill.ca>

Yes, I still rather like it! 25Mhz is a limitation and also only one channel... but otherwise it's great.

The battery lifetime, from what I can estimate, is somewhat longer than the salesperson stated (I'd say 3 to 4 hours, not 2).

My only complaint is that signals seem to be noisier than I'd expect... but I'm used to decent analog scopes. I typically switch to more accurate tools to measure DC voltage and capacitance, but the multimeter features work quite fine.

I did not test the trigger function, but a freind of mine informs me that it works, we used it to determine the baud rate of serial communications between some bios and a CPU on a device he was trying to root.

My favorite feature is the "calculate" button once you have stored data. It calculates a variety of stats on recorded signals, like frequency, duty cycle, max/min/average voltage, and other things I used to do by hand.

Long story short, perfect for low-frequency digital stuff like working with MCUs.

This reminds me, I'm teaching a new workshop "PWM for lighting control" Saturday! If you have an AVR programmer, I'd be happy to provide firmware and diagrams so you could teach the course too.

-Sean
________________________________________
From: Ricky Ng-Adam [rng...@gmail.com]
Sent: Thursday, March 29, 2012 11:31 PM
To: xinch...@googlegroups.com
Cc: Sean Boyce, Mr
Subject: Re: Group order

+cc: Sean

Hey Sean, what's the portable oscilloscope you bought again? Are you happy with it?

2012/3/30 hao jiang <edwa...@gmail.com<mailto:edwa...@gmail.com>>

Great tool he qichen has posted, for me it has only 2 draw backs:

1. Size, amost 20cm long, not as portable as the other choices.
2. Not coloured display... not cool enough to show off the girls at a fine dine table, if you take it out in the restaurant, people would mistake you for a technician fixing the table light.

But, there is always no perfect choice right? given a fixed price, there is always gonna be some trade off.


Anyone has any experience with the DSO203 (AKA DSO quad)?
http://item.taobao.com/item.htm?id=9655742431&ref=http%3A%2F%2Fsearch8.taobao.com%2Fsearch%3Fq%3DDSO203%26commend%3Dall%26ssid%3Ds5-e%26pid%3Dmm_14507416_2297358_8935934&ali_trackid=2:mm_14507416_2297358_8935934,0:1333072666_3z4_928855502

Sample rate up to 72Msa/s, 2 channels.

Reviews needed.

Regards
Edward

2012/3/30 萨克森气势 <sachse...@gmail.com<mailto:sachse...@gmail.com>>:

> Well, all in Chinese there but I trust Kirk ;-)
> lets see what still comes up
>
> ~Lutz
>
>

> 2012/3/29 Kirk Lau <kirk...@gmail.com<mailto:kirk...@gmail.com>>

[萨克森气势]

Thanks for following up with this. 

Sean, are you talking about that DSO Nano V2 ( http://www.seeedstudio.com/depot/dso-nano-v2-p-681.html?cPath=174 )?

If so then it's really not the worst choice for working with µC's.

Checking this whole discussion I am a bit confused now. Would the DSO Nano V2 be wasted money or a good tool to expand my measuring capabilities?

~Lutz

2012/4/24 Ricky Ng-Adam <rng...@gmail.com>

[EdwardRF]

Hey lutz,

I miss you very much.

The DSO we brought together is still functioning well, and I did even downloaded an open source logic analyzer firmware.

Let me know if you want to try it too.

Regards

Edward

[ourst...@gmail.com]

I also constantly miss Lutz.

He gave me some steppers and linear rods, bearing etc, which I have now re-used in 3 different projects.

I also keep bumping into Swarm robot parts in my parts boxes as well, so have many happy memories of Lutz.

Spencer

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