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James C (peabody124)
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Linear Gaussian Quadratic Control System
For the last year when I've had time, I have been developing an entirely new control scheme (at least as far as I know for the open source community) for multi rotors that replaces PID by expanding upon  Tau Labs System Identification  (see the mathematical...

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TauOSD + VTX +Tau Labs 
After the amount of fun I had putting a VTX on Brushed Sparky, it got me asking what else would benefit from integration? In the background, I've also been plodding away at a few various revisions of TauOSD. This was inspired by BrainFPV resurrecting and vastly improving the OSD code. The video overlay of that was working fairly nicely, so adding a VTX directly on board seemed like a fun idea

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+Tau Labs  #sparky2  flying path navigation to fly the TL logo with autonomous takeoff and landing. #taulinkmodule  was used for control and to acquire the in flight logs. Python was used for log processing and to generate the video overlays. 

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Tau Labs and CyPhy "Level Up"
It was exciting to see another player adopting +Tau Labs  at their core with the announcement of the CyPhy LVL 1 kickstarter. This is a really neat drone project that removes the need for a gimbal while flying by being able to navigate around and remain leve...

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BLHeli OneShot Quantitative testing
I previously did some tests with KISS ESCs comparing the performance with OneShot to normal PWM modes showing Tau Labs implementation has a nice low latency from sensor update to output pulse, as well as the fact that OneShot results in better system perfor...

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BrushedSparky v0.2
BrushedSparky version 0.2 arrived a few days ago.  Improvements There are a number of improvements over the previous revision . A bigger motor mount hole allows for stronger mounts. Using a 1.2 mm PCB shaves a bit of weight off.  Changed the 5V step up regu...

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BrushedSparky: Sparky2 + Microquads
I am now really into microquads for a number of reasons. They are much cheaper and relatively easier to build than full sized ones. They are great for testing things indoors while being quite safe. They make FPVing around a small space an adventure. Finally...

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BrushedSparky: Sparky2 + Microquads
I am now really into microquads for a number of reasons. They are much cheaper and relatively easier to build than full sized ones. They are great for testing things indoors while being quite safe. They make FPVing around a small space an adventure. Finally...

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OneShot125: Quantitative Testing
There has been a lot of talk about OneShot125 mode for ESCs and how much better you can tune your quadcopter with it. Briefly, this is a mode that uses a pulse width of 125-250 µs instead of the typical 1000-2000ms. This shorter pulse width allows a higher ...

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More log analysis
I was testing position hold with the new 14 state INS the other day with Sparky2 on Seeing Spark . The new filter is working great. I ran autotune and 6 point calibration and engaged position hold and it held beautifully still. The new estimation of the z-a...
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