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.
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.
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.
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?
I know they are probably pretty cheap’n nasty, but for that price, they are pretty much disposable.
the eBay link asks me to sign in…
http://www.ti.com/product/CD4053B
They are quite cheap
[RogerClark – Thu Dec 14, 2017 11:07 am] –
Andy,the eBay link asks me to sign in…
Ooops. 
Fixed.
[RogerClark – Thu Dec 14, 2017 11:13 am] –
Btw. In tha video the analog input seems to be done with a 4053http://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
http://www.seekic.com/circuit_diagram/B … TRACE.html
Now who fancies designing an 8 channel pig-o-scope ? 
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
however, with only 20k ram i’d guess there’d be limits on what can be stored and transmitted
the other issue would be keeping sync between different BP or MM, as if it is possible to sync things up we could literally have multiple MM/BP sampling from different channels and feeding them back to the host
a scheme i’m thinking of using similar schemes like NTP (network time protocol) to sync the RTC across multiple BP / MM, then we can possibility issue capture at time command so that at that same instance the multiple BP / MM start capturing, store that in that limited 20k ram and later the host poll each MM/BP to ‘collect’ the results
not too sure if such a scheme is even feasible as even 1ms misalignment and if we sample at 1msps would be 1000 samples off
just some thoughts :/
