New Real-Time Plotting App for Teensy and Arduino

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StanfordEE

Well-known member
Dear Fellow Teensy Fans, Educators, Nerds, et al.,

Under the banner of "VoidLoop, Inc." we have finally launched a fast (!) real-time plotting app for Mac and PC with an extensive open-source library optimized for Teensy 4.X but compatible with Arduino (more soon). While appreciated, the Arduino Serial Plotter is severely limited, so I was inspired to explore alternatives more than ten years ago. Finally, teaming up with a great app developer, we have built out way more than my original vision.

It gives full control over multiple traces, with "scope-like" functions such as persistence, color-grading, peak-hold, spectrogram and more. X-Y and polar plots, as well as "strip-chart" modes are all supported.

I'm trying to get registered on this forum as VoidLoop (not sure how long that takes), but for now this will do. Please take a look.


Thanks,
Greg

P.S. Very much under construction. Soon to have teaching materials from my Stanford classes and over the coming months launching a series of cool, inexpensive hardware educational tools based around Teensy 4.1, all with open source goodies!

https://www.voidloop.com/
 
Angelo said:
You forgot to mention: not free, cost 50$
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Well, the Teensy 4.1 is not free either. It is no crime to ask a modest amount for the fruits of a lot of labor. Forthcoming hardware products will be modestly priced with open-source code.

Thanks,
Greg
 
I have no problem with this. It is totally normal to ask money for your wok.
It was only to be clear that you were "advertizing" your product, wich I am not sure it is allowed on this forum.
 
I did not find any prohibitions in the rules I could find, and this was simply meant to be an "announcement." I assume the forum administrator will let me know if it is an issue.
 
StanfordEE said:
Very much under construction. Soon to have teaching materials from my Stanford classes and over the coming months launching a series of cool, inexpensive hardware educational tools based around Teensy 4.1, all with open source goodies!
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Nice tool. Have to think about. Right now I have been using an old version of telemetry viewer. If interested here is the link: http://www.farrellf.com/TelemetryViewer/

Always good to have options. Have to dig into it a bit more.

Thanks for posting.
 
StanfordEE said:
I assume the forum administrator will let me know if it is an issue.
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Well, speaking as the forum admin, we have an unwritten rule (which could also be called a common sense rule) that community perception and reaction matters for promotion of commercial products, and for a variety of topics that veer from using Teensy.

We're a community of real people. That's the most important thing to remember.

We also have a pretty good history of tolerating somewhat (or very) off-topic stuff for a while.

Personally I think this software looks interesting. Not sure if I'd pay $50. But looks like only Windows and MacOS. No Linux version?
 
Paul - no intent to break rules nor irritate anyone. Please take this down if you or the community find it offensive. I would appreciate clear guidance, since not all of us will intuit the "unwritten rules."

Not everyone would pay $50 of course, but there seems to be an expectation that "software is free" - which inhibits what we are trying to do, which is a professional and evolving app that (finally) supports Mac and Windows. Mac is so often the choice in education and in my view has been very much neglected for technical apps.

Linux is possible, but not in the current roadmap, which has us focusing on hardware over the coming months. A stand-alone version that operates a RPi as a "kiosk-mode" display driver has been successfully tested and will come along this year.

In terms of "using Teensy" - we optimized around Teensy 4.1 and our hardware offerings are 100% based on Teensy 4.1. Very soon, we will release an open-source DMA parallel sampling library for data acquisition - with tutorials. Easily handles fast ADC's.

Anyway zero intent to break any rules nor irritate anyone. Again, please feel free to take this down. You are the boss.
 
mjs513 said:
Nice tool. Have to think about. Right now I have been using an old version of telemetry viewer. If interested here is the link: http://www.farrellf.com/TelemetryViewer/

Always good to have options. Have to dig into it a bit more.

Thanks for posting.
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Thanks - very cool app. I had not heard of it. We will take a look. Right off the top though, it does not support Mac, which is a prime driver for us, since technical apps on the Mac are few and far between, often just hacks and ports. We wanted to actually make it look and feel more like a Mac app and then bring that to the Windows folks... :)
 
Here is our overview and "quick-start" video using a Teensy 4.1 (the ADC DMA library used is Pedvide's, of course). As a side note, the on-board Teensy 4.1 ADC's - based on careful testing - are not good above 800kSPS. Apparently internally-generated harmonics make the 1MSPS option unusable for precise signal processing (work-around ideas welcomed!). Hoping this is of some interest.

 
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