Red Pitaya anyone?
Heater.
Posts: 21,230
I only just discovered the Red Pitaya.
2 channels analog input at 125MS/s 14 bit resolution. 2 channels of analog output with matching specs. A bunch of other interfaces including digital I/O, slower analog I/O, UART, USB, Ethernet. Runs Linux. Does not need any crappy Windows only application to use it. Open Source ready for hacking on.
Oh my God I want one! How on Earth did I miss this on KickStarter over a year ago? I might have to delay my oscilloscope purchase whilst I blow that budget on one. Sadly it's a bit late to get one in time for Christmas.
Does any one here have a Red Pitaya or have you played with one?
http://redpitaya.com/
2 channels analog input at 125MS/s 14 bit resolution. 2 channels of analog output with matching specs. A bunch of other interfaces including digital I/O, slower analog I/O, UART, USB, Ethernet. Runs Linux. Does not need any crappy Windows only application to use it. Open Source ready for hacking on.
Oh my God I want one! How on Earth did I miss this on KickStarter over a year ago? I might have to delay my oscilloscope purchase whilst I blow that budget on one. Sadly it's a bit late to get one in time for Christmas.
Does any one here have a Red Pitaya or have you played with one?
http://redpitaya.com/
Comments
Interesting device. OTG Port to plug into my new HP Stream 7.
Allied, (USA), has 189 in stock to ship.
http://www.alliedelec.com/search/productdetail.aspx?SKU=70357417#tab=specs
We could program Propellers from the Red Pitaya using a web based editor then use it to debug our creations. Neat!
I'm thinking that a Red Pitaya coupled with a tablet for display is enough of an oscilloscope for whatever I am likely to do that I could forgo the real scope altogether.
There is only one way to find out I guess...
I like their choice of more bits, to allow simpler IP scaling, and it means this makes a decent multimeter too.
Downside is the total price
multimeter? Hmm...up to a point, if you don't need to measure high voltages or you are OK to to start adding circuitry for input protection, range scaling, current/resistance measurement etc. A cheap multi-meter will beat the Pitaya at being a multi-meter hands down.
I think just the LC meter possibility is attractive though, it competes on price with many such meters plus offering a ton of other functionality.
More bits may give you a finer resolution, but at close to 50Mhz, you would be taking only 2 samples per cycle. may have a fairly ugly waveform as a result. This was one of the things that turned up in my analog capture experiments (wow!) a couple of years ago. But it is cheaper than a 1Gsps 100Mhz scope.
To bad someone can't rip a page out of the old Tek manual. They used ccd clocked to store analog samples at full speed then digitized the contents when the trigger condition was met. My 2430A does this.
My dilemma is that one can get a Rigol DS1054Z scope for about the same price. 1GS/s 50MHz band width and huge sample memory. Which it seems can be unlocked to get 100Mhz band width.
http://www.digilentinc.com/Products/Detail.cfm?NavPath=2,842,1018&Prod=ANALOG-DISCOVERY
Sort of similar yes.
But no. Analog discovery needs the WaveForms™ software to be useful. Old fashioned Windows only, closed source, binary executable application.
Not any use to users of other systems. And not something one wants to invest ones time in over the long haul.
Red Pitaya is a open source playground. Something you can build on.
Your unbridled criticism of all things windows and closed source keeps you from making any objective judgement about it. I reject your opinion entirely. I am moving to Linux, but I am not so closed minded that I would reject a quality product based on the os. At the user level, the world does not revolve around Linux. Get over it.
-Tor
I'm glad to see that Digilent have a Linux port of their USB scope software. I did not get to see that yesterday as out here in the forest the mobile internet connection is very bad (It's better today now that I have use of a laptop and 3G USB stick rather than my old phone).
I'm sure that the Didgilent USB scope is a good quality product. I'm also sure that if it meets ones needs one will be very happy with it.
To characterize my issues with closed source software as some how not objective and "closed minded" is a little bit insulting. There are plenty of sound logical, technical and economic reasons for wanting to avoid closed source solutions. Tor has described one of the important ones very well above. My negative gut reaction is born of many years of having to deal with the bad consequences of closed source solutions.
Feel free to reject my views. You will come to appreciate them in the future. Too true. However a big chunk of it revolves around Android on tabs and phones or Chrome OS. Another big chunk revolves around Apple. Cross platform and open source support is all the rage now a days. As an example see the great strides Parallax has made in recent years. I'm not totally sure I know what you mean there but I think my response is "no".
Now, all this is a tad off topic. Perhaps what I should have said in my last post is something more like:
Yes, at a superficial inspection the Digilent device looks similar. They both have fast analog input and output and some digital I/O.
However they are very different products. The Digilent is a USB oscilloscope/logic analyser that needs your PC. The Pitaya is a dual core ARM processor board running Linux together with an FPGA fabric, two channels of fast analog input, two channels of fast analog input, ethernet, USB, UART, and a bunch of other I/O. Topped of with some free and opensource software that makes it very useful out of the box which can be used with the platform of your choice.
They are chalk and cheese. Take your pick for the purposes you have in mind.