DS212 Open Source Oscilloscope.

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ahull
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DS212 Open Source Oscilloscope.

Post by ahull » Thu Dec 14, 2017 7:05 am

Yet another STM32 based oscilloscope.



It uses the STM32F303VCT6 - skip to around https://youtu.be/lxxS6rvrk3o?t=280 for more details.

Comes in at around $90 - > https://www.ebay.com/sch/i.html?_odkw=d ... e&_sacat=0

Probably too late to ask Santa for one shipped from China this Consumermass, but you might find one local to you, if you are willing to pay a little more.
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RogerClark
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Re: DS212 Open Source Oscilloscope.

Post by RogerClark » Thu Dec 14, 2017 8:57 am

It looks nice, but...

For that price (looks like its over $100 USD on eBay), you can probably get a much better USB oscilloscope to hook up to a PC

It claims 10M samples per sec, so that's at best a 5Mhz bandwidth.

I can appreciate that its handy to have a portable oscilloscope, but there are multimeters with scope like features that have higher bandwith for the same price or even sometimes cheaper.

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Re: DS212 Open Source Oscilloscope.

Post by ahull » Thu Dec 14, 2017 9:28 am

I agree there are other options, and better bandwidth at that price point.

The look and feel of the thing, its portability, robustness, open source nature and features make me feel there will be a market for it.

Personally for that money I would probably look at picking up a "real" second hand scope, but then again I'm not looking for a portable device. I'm also the sort of person who would get as much fun from fixing up an old scope as I would from a shiny new toy like this.
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Re: DS212 Open Source Oscilloscope.

Post by RogerClark » Thu Dec 14, 2017 9:52 am

You can build a Pig-O-Scope for $10, I think thats much more fun and almost as practical as a test tool !

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Re: DS212 Open Source Oscilloscope.

Post by ahull » Thu Dec 14, 2017 10:07 am

If someone came up with a decent analog front end for the pig-o-scope at pocket money prices it would be great.

It is getting to the stage that a mass produced pig-o-scope level scope could easily be churned out by the usual suspects in China for not much more than the ubiquitous DM830B multimeter. Throw in the functionality of one of those atmega based "component testers", a frequency/waveform generator, maybe a precision voltage source and selection of cheap probes and you can stick an entire electonics lab in a suitcase for well under the price of the DS212.

BTW I should avoid going on ebay.. latest impulse purchase.. -> http://www.ebay.co.uk/itm/4mm-Multimete ... 2660777770?

Image

I know they are probably pretty cheap'n nasty, but for that price, they are pretty much disposable.
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Re: DS212 Open Source Oscilloscope.

Post by RogerClark » Thu Dec 14, 2017 11:07 am

Andy,

the eBay link asks me to sign in...

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Re: DS212 Open Source Oscilloscope.

Post by RogerClark » Thu Dec 14, 2017 11:13 am

Btw. In tha video the analog input seems to be done with a 4053

http://www.ti.com/product/CD4053B

They are quite cheap

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Re: DS212 Open Source Oscilloscope.

Post by ahull » Thu Dec 14, 2017 11:30 am

RogerClark wrote:
Thu Dec 14, 2017 11:07 am
Andy,

the eBay link asks me to sign in...
Ooops. :oops: Fixed.
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Re: DS212 Open Source Oscilloscope.

Post by ahull » Thu Dec 14, 2017 11:32 am

RogerClark wrote:
Thu Dec 14, 2017 11:13 am
Btw. In tha video the analog input seems to be done with a 4053

http://www.ti.com/product/CD4053B

They are quite cheap
Yes, they seem to be quite a popular choice for this kind of application.

Something related/similar using a 4052

Image

http://www.seekic.com/circuit_diagram/B ... TRACE.html

Now who fancies designing an 8 channel pig-o-scope ? :D
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Re: DS212 Open Source Oscilloscope.

Post by RogerClark » Thu Dec 14, 2017 8:04 pm

Synchronising the multiplexer with the DMA ADC , to switch inputs at the right time, would be “interesting”.
Perhaps DMA some bits of one of the timers to some GPIO pins..

However, range selection via the multiplexer would be more useful.

If the Ds212is truely open source, perhaps their input schematic is posted somewhere, so we could see how they are using the multiplexers

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