Search found 25 matches

by Astrobiologist
Sun Dec 15, 2019 10:40 pm
Forum: Bitcraze
Topic: 2.0 vs 2.1
Replies: 1
Views: 851

2.0 vs 2.1

What are the differences between the Crazyflie 2.0 and 2.1 models please? I am coming back to experimenting with my 2.0 after some time. Is there anything I can't do with it that I can do with the 2.1? Any incompatible decks for instance? Apologies if this has already been summarised somewhere (alth...
by Astrobiologist
Tue May 15, 2018 10:24 am
Forum: General discussions
Topic: Atmosphere and gravity modelling for CrazyFlie2
Replies: 5
Views: 1562

Re: Atmosphere and gravity modelling for CrazyFlie2

It is actually going to fly - but note the very high RPMs and oversize rotor blades: https://spaceflightnow.com/2018/05/14/helicopter-to-accompany-nasas-next-mars-rover-to-red-planet/ So I wonder how high a drone could go on Earth with similar adaptations? Maybe a drone launched from a balloon with ...
by Astrobiologist
Wed Feb 21, 2018 10:12 pm
Forum: General discussions
Topic: Craziest of Crazyflies - Spinning out of control
Replies: 12
Views: 7101

Re: Craziest of Crazyflies - Spinning out of control

I had the same problem and like the other posters, I traced it to a problem with the game controller I was using. In my case I was using a Vakoss PS3-type controller, and I had forgot to select "analog". So I imagine it was flying with some axes hard over.
by Astrobiologist
Sat Feb 10, 2018 1:00 pm
Forum: General discussions
Topic: Atmosphere and gravity modelling for CrazyFlie2
Replies: 5
Views: 1562

Atmosphere and gravity modelling for CrazyFlie2

Does the Crazyflie have an atmospheric model as part of its control algorithms? For instance, it has a barometer, so is ambient air pressure taken into account? If the air pressure is 1020mBar one day and 980 the next day, then presumably the propellers have to compensate by a factor of 980/1020 to ...
by Astrobiologist
Sat Feb 10, 2018 12:19 pm
Forum: General discussions
Topic: USB charging specs for CrazyFlie2... solar power...
Replies: 1
Views: 897

USB charging specs for CrazyFlie2... solar power...

A colleague of mine had some very off the wall ideas for drones, which got me thinking. I will break them down into a couple of threads. Right, first off, what are the charging parameters for the CrazyFlie2 to successfully charge over the USB port? I.e what voltage and current? Specifically, someone...
by Astrobiologist
Sat Feb 10, 2018 12:12 pm
Forum: General discussions
Topic: United kingdom
Replies: 1
Views: 990

Re: United kingdom

I have purchased spare parts and expansion decks from the unmannedtech website a couple of times with no trouble whatsoever. Shipping was quite prompt.
by Astrobiologist
Sat Feb 10, 2018 11:53 am
Forum: Developer Discussions
Topic: UART vs I2C vs SPI
Replies: 1
Views: 833

UART vs I2C vs SPI

I have been considering creating my own deck. Looking over some similar posts on the fora, there have been some reports of incompatibilities using both the I2C and SPI buses, so what would work best? I note also that there are two UARTs available. Which of these four options is on which pin please o...
by Astrobiologist
Sat Feb 10, 2018 10:23 am
Forum: Developer Discussions
Topic: OpenCV hover-assist
Replies: 34
Views: 10219

Re: OpenCV hover-assist

Many thanks for this. I checked the GitHub code quickly, but could I just ask: Why is the variable "W" set the way it is? I am assuming this is the X,Y coordinates of your LED square to detect. So why w=0.026/2.0 ? Were you tracking a particular altitude? Apologies if I have got the wrong end of the...
by Astrobiologist
Fri Jan 26, 2018 10:35 pm
Forum: Developer Discussions
Topic: Attaching LED's to CrazyFlie 2.0 and OpenCV
Replies: 3
Views: 1183

Re: Attaching LED's to CrazyFlie 2.0 and OpenCV

This has the potential to be an excellent first project for basic IO off the pins (turning GPIO pins on and off, by extension using them as input pins, etc) but I really can't make out the C at all. I suppose there's not much you can say except that I should study C hard.... I have coded for Arduino...