James Cotton
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  • Houston, TX
  • United States
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About Me:
OP Dev
Please tell us a bit about your UAV interest
I like them, they are fun

James Cotton's Blog

BrushedSparky v0.2

Posted on March 25, 2015 at 4:00pm 3 Comments

This is an update on the BrushedSparky that I posted about a month ago.

I got…

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BrushedSparky - TauLabs integrated frame FPV brushed microquadcopter

Posted on February 28, 2015 at 5:27pm 5 Comments

 

OsoGrande got me into brushed microquadcopters recently. Sparky2 has some buffered outputs so at first I was just slapping it on frames and jury rigging things together. Very quickly, I wanted something more elegant.…

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OneShot125 latency testing

Posted on February 1, 2015 at 9:00am 6 Comments

I thought you guys might find this interesting. Support for OneShot ESCs was recently written for Tau Labs (http://taulabs.org) and it seems like most of the claims that it is good are largely subjective (which is…

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Tau Labs Altitude control loop architecture and INS tuning

Posted on March 14, 2014 at 9:30pm 15 Comments

So for the last week or two I have been looking a bit at the performance of the Tau Labs altitude control and INS filter we have and the altitude control loop.

 

One issue I was suffering from is that the velocity estimate would be biased because of variations in the accelerometer bias. I switched to using a 16 state version of the INS written by Dale Schinstock that included an estimate of the bias terms for…

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