Category: Blackbox
-
This is why YOU SHOULD use only 8 channels in Betaflight!
When two weeks ago I said that you should only 8 channels when using FrSky SBUS I meant it and you just had to take my word for it. Today a small proof how Betaflight 3.5 feedforward component looks on the Blackbox with 16 channels and 8 channels. Of course, in both cases, RC smoothing…
-
Crossbow LRS: this one did not went well…
Sometimes you win, sometimes you lose. This time I’ve lost. Not by much, but always. During testing of my DIY LoRa RC link, radio caught a glitch during a flip few meters above a ground. It was not even a failsafe situation. Link recovered a few milliseconds later, but it was too late and quadcopter…
-
Gyroscope and filtering video tutorial – Episode 4
In this episode of “Gyroscope and filtering” I show you how to configure notch filters using Betaflight Configurator and INAV Configurator software. Previous episodes: Episode #1 Episode #2 Episode #3
-
If not HC-SR04 then what? US-100 maybe….
A week ago I wrote that HC-SR04 ultrasonic rangefinder is crap and it is still true. Only around 1m useful range and very jumpy behavior above are at least problematic… There is a better solution. US-100 ultrasonic rangefinder. Comparing to HC-SR04, it has at least twice the useful range. My preliminary tests gave solid readout…
-
HC-SR04 is crap and there is nothing you can do about it…
Only few days ago I mentioned that I started to reintroduce sonar support to INAV. When DigitalEntity told me that popular HC-SR04 is crap I did not belived him. I expected that “official” 4m range on a noise-machine aka quadcopter is unrealistic, but data I recorded today clearly shows: HC-SR04 is crap and is absolutely…
-
Flight Controller Soft Mount – is it worth it?
Is it worth to soft mount flight controller? Are gyro pads I recommended here better than rubber standoffs? I feel that they are better, but I do not have any solid data to prove it. So I can only tell, that I find them better and that is all. But, I can answer the question…
-
Gyroscope and filtering video tutorial – Episode 3
In this episode I talk about: How to analyze Blackbox log for gyro noise How to find frequencies for gyro and Dterm notch filters in INAV, Cleanflight and Betaflight
-
Yaw unstable at full throttle
Last weekend I’ve experienced quite serious problem with Reptile X4R 220 racing quadcopter: on full throttle quad was loosing stability. At first, it was starting to drift yaw to the right. Then, if throttle was not lowered, roll and pitch was also becoming unstable and quad was doing crazy things in the air. I do…
-
How to measure gyro noise frequency with Blackbox
Cleanflight / Betaflight / INAV lowpass filter tuning can be a hard thing to do if you have not idea what is noise frequency you want to cancel. Sure, you can blind test or read tutorials. But what if I tell you, you can measure it quite precisely using only Blackbox logs? Or measure rotation…