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Red Pitaya Anatomy 101

Andrew Back
Open source (hardware and software!) advocate, Treasurer and Director of the Free and Open Source Silicon Foundation, organiser of Wuthering Bytes technology festival and founder of the Open Source Hardware User Group.


July 4, 2014 17:57

Really excited about the PID application being developed for the Red Pitaya.

This blog link shows some of the evaluation tests: see "Speeding up the Light"

The basic control loop image (from the blog) is
[attachment=0:31j83l50]DesignSpark Red Pitaya PID.png[/attachment:31j83l50]

Everything is in the PC or the Red Pitaya except the real world interface i.e. just add your power amp/ output device and your input sensing shown in the blue area.

This would have been so useful for establishing and testing some control loops I have worked on, but now I'll be able to add this new tool free of charge by a simple download.

This is clearly just the beginning for very powerful open source tool.

Soon I will have in addition to the scope, spectrum analyser, signal generator a nice new PID controller and LCR meter.
Plus I can see many exciting applications will develop that without the Red Pitaya I would not have invested in the specialist tools required for. For example:
Measuring magnetic materials properties,
Transfer function analysers
and one specialist application tool that is well suited to the Red Pitaya an electro-chemistry system such as Cyclic Voltammetry and the many waveform variants.

Now to do some searching and reading of the other exciting Red Pitaya developments. Let us all know what other Red Pitaya developments you find.

0 Votes

May 28, 2014 06:42

Thanks Andrew for this interesting article, you make it very inviting to start investigating programming the Red Pitaya.

You also prompted me to revisit the Bazaar and it was well worth the visit, I found new applications there:

Frequency Response Analyzer (0.91-13013)
Characterization of the system dynamics by measuring the magnitude of the output
as a function of frequency, in comparison to the input.

PID Controller & Oscilloscope (0.91-13014)
A 2x2 MIMO PID controller with integrated two channel time domain signal visualization system.

CalScope (0.91-1)
Oscilloscope upgraded with DC offset Calibration and trace Download

Plus on the development list I found an LCR Meter is 'coming soon'.

Of the above the new CalScope addresses my main issue with the original Oscilloscope program, in that I could not download the captured waveform view. This is now addressed.

This rapid development of an improved program and the new applications show the power of Red Pitaya combined with the open source arrangement.
I look forward to getting more powerful 'free tools' such as the LCR meter in the future.

0 Votes

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