Red Pitaya

This is where we talk about testing, measuring and repairing things. Sometimes we have to repair the equipment we use to test, measure and repair other things. It's an endless cycle of fixing the broken things we need to fix other broken things.
lsburden
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Location: Wimberley, TX

Red Pitaya

Post by lsburden »

Anybody heard of the Red Pitaya?

https://www.redpitaya.com/
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mediatechnology
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Re: Red Pitaya

Post by mediatechnology »

Thank you for posting that!

I hadn't heard of it and need to do a deep-dive. Looks really cool.
https://ka-electronics.com

Apple-flavored Ivermectin is delicious.
billshurv
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Re: Red Pitaya

Post by billshurv »

Somewhat offputting that all the software runs on a browser. But then again a full Virtins multi-intrument suite is around $500
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mediatechnology
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Re: Red Pitaya

Post by mediatechnology »

WRT it running in a browser I like the platform independence that offers.
Seems to also suggest that the computational load is in the Red Pitaya.
With it serving up web pages is it fair to call it a measurement server?

Couldn't find links to a US distributor.
Not sure I could afford it any way.
https://ka-electronics.com

Apple-flavored Ivermectin is delicious.
billshurv
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Re: Red Pitaya

Post by billshurv »

They appear to ship direct from Slovenia.
lsburden
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Joined: Tue Oct 23, 2018 2:24 pm
Location: Wimberley, TX

Re: Red Pitaya

Post by lsburden »

Available at Mouser in various packages ranging from $240 to $720.
https://www.mouser.com/Embedded-Solutio ... ya&FS=True

Its really interesting. There are some youtube videos. There are already several applications available (scope, spectrum analyzer, frequency response, etc.) but I would like to see an FFT application and possibly a distortion analyzer.

Anyways, really cool. I like the open source model. I have recently started using kicad and learning freecad.
Gold
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Re: Red Pitaya

Post by Gold »

That looks great. I’ll have to look at it in more detail. It’s great that it will run on anything.
billshurv
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Re: Red Pitaya

Post by billshurv »

There are certainly applications for higher sampling rate than a standard sound card will do.

The analog discovery board https://store.digilentinc.com/analog-di ... ro-bundle/ is a lot cheaper and still does a lot. I need an impedance analyser for my vinyl playings and was considering this to automate a boring manual task.
Gold
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Re: Red Pitaya

Post by Gold »

I'm unsure about how the bit depth relates to noise floor. When looking at an Oscilloscope I look at vertical scale resolution to figure out noise floor. This doesn't give a spec on the Oscilloscope page. How do you figure that out?

The input and output voltage range is quite small. Would you need to build an external box to measure line level audio?
lsburden
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Re: Red Pitaya

Post by lsburden »

Gold wrote: Thu Feb 21, 2019 1:20 pm I'm unsure about how the bit depth relates to noise floor. When looking at an Oscilloscope I look at vertical scale resolution to figure out noise floor. This doesn't give a spec on the Oscilloscope page. How do you figure that out?

The input and output voltage range is quite small. Would you need to build an external box to measure line level audio?
I'm not an expert in digital audio conversion so I can't answer your question with any certainty. I have some experience with ADC's and DAC's but still only have a shaky understanding.
Maybe this can help(?) - https://en.wikipedia.org/wiki/Audio_bit_depth.

Yes. I would expect to have to build an external box.
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