Search found 11 matches

by Alterscape
Thu Nov 08, 2012 5:51 pm
Forum: General discussions
Topic: Indoor positing system
Replies: 8
Views: 2023

Re: Indoor positing system

All those cool "Quadcopter swarm flying in formation" videos are using marker-based optical motion capture. It's going to be expensive (minimum of several thousand dollars to get set up with something like Natural Point OptiTrack), and you'll need to set up your system in advance, but it's...
by Alterscape
Sun Aug 19, 2012 11:39 pm
Forum: Ideas
Topic: Multiwii & PS2 controller & xbee
Replies: 5
Views: 1461

Re: Multiwii & PS2 controller & xbee

No worries about the language! And I totally agree/respect your reasons for wanting to do this, for the record -- was just saying if you want to save money or time, this is not the way. I'm not sure what to do about your include problem, but good luck! I'm curious how this works out (and swamped wit...
by Alterscape
Sat Aug 18, 2012 5:08 am
Forum: Ideas
Topic: Multiwii & PS2 controller & xbee
Replies: 5
Views: 1461

Re: Multiwii & PS2 controller & xbee

Is it possible? Yes. Tommie has some custom firmware that's been used by Pyrofer to drive a regular RC transmitter with a PS2 controller (Tommie's also used it to get a lot of features out of a very cheap radio). It would be possible to modify that setup to use the xbee instead, and likewise modify ...
by Alterscape
Thu Aug 02, 2012 3:05 am
Forum: Pictures & Videos
Topic: Quadrotor Visuals
Replies: 3
Views: 1028

Re: Quadrotor Visuals

I work with optical motion capture solutions from Motion Analysis and OptiTrack in grad school. I have not used Vicon gear but I know the principle of operation is very similar. The system consists of at least three high-speed IR-sensitive cameras (most setups have 8+; we have 32 Motion Analysis Eag...
by Alterscape
Tue Jul 17, 2012 12:32 am
Forum: Software development
Topic: Severe security issue with ESC calibration
Replies: 20
Views: 1861

Re: Severe security issue with ESC calibration

Maybe the code there should be changed to include a comment to the tune of "DO NOT CALIBRATE YOUR ESCs WITH PROPS ATTACHED," optionally with a note that ESC calibration may cause the motors to spin up and that would be bad as we've seen. It's written in many places, but it's possible to mi...
by Alterscape
Sun Jul 01, 2012 10:05 pm
Forum: Software development
Topic: I2C error handling diffs between 2.0 and 120622?
Replies: 9
Views: 1388

Re: I2C error handling diffs between 2.0 and 120622?

I've only flown with the WMP and the L3G4200D, so I don't have that much breadth of experience to speak from. I will say, however, that the L3G4200D feels much more stable than the WMP gyro, on my micro-quad. The WMP tended to have a serious bias to yaw nose-right (clockwise) that I had to trim out;...
by Alterscape
Sun Jul 01, 2012 8:30 pm
Forum: Software development
Topic: I2C error handling diffs between 2.0 and 120622?
Replies: 9
Views: 1388

Re: I2C error handling diffs between 2.0 and 120622?

I think this was some combination of hardware error (possibly bad connection on SDA or SCL) and my own silliness. It's working now, on 0622. Defines as follows: #undef INTERNAL_I2C_PULLUPS #define L3G4200D #define ADXL345 #define ADXL345_ADDRESS 0x53 #define BMP085 #define HMC5883 #define ACC_ORIENT...
by Alterscape
Fri Jun 29, 2012 10:49 pm
Forum: Software development
Topic: I2C error handling diffs between 2.0 and 120622?
Replies: 9
Views: 1388

Re: I2C error handling diffs between 2.0 and 120622?

I'm more concerned about the blinking LED I2C comms error state -- that doesn't happen in 2.0, so long as the ADXL345 is not set up/defined. In 120622, even if I have #define ADXL345 commented out, I get the blinking LED for I2C errors if I have any I2C devices active (for instance, just the L3G4200...
by Alterscape
Fri Jun 29, 2012 9:46 pm
Forum: Software development
Topic: I2C error handling diffs between 2.0 and 120622?
Replies: 9
Views: 1388

I2C error handling diffs between 2.0 and 120622?

I am trying to run down a change in how I2C errors are handled between MWC 2.0 release and dev 120622. My IMU platform is an ebay-purchased 10dof IMU http://www.ebay.com/itm/10DOF-9-axis-sensor-module-L3G4200D-ADXL345-HMC5883L-BMP085- with the L3G4200D gyro, ADXL345 acc, HMC5883 mag, and BMP085 baro...
by Alterscape
Sun Mar 11, 2012 12:30 am
Forum: Getting Started - MultiWii config and setup
Topic: Powering with ESCs and FTDI Cable during setup?
Replies: 1
Views: 605

Powering with ESCs and FTDI Cable during setup?

I'm working on building my first MultiWii copter using a BobsQuads Super Simple Shield, an Arduino Pro Mini, and a Genuine WMP board. I do not have the matching Bluetooth adapter that blueskyrc sells; I do have a Sparkfun BlueSMiRF I could set up if I have to, but I'd rather not for now. I noticed t...
by Alterscape
Mon Feb 27, 2012 7:22 pm
Forum: Getting Started - MultiWii config and setup
Topic: 1.9 -- config.h for genuine WMP only?
Replies: 1
Views: 695

1.9 -- config.h for genuine WMP only?

Newbie to MultiWii, semi-experienced ATMega hacker, here. I need to uncomment the proper #define to enable communication with the Wii Motion Plus board, but it isn't clear to me from the comments which #define I should uncomment. None of them line up with the part number for the WMP's accelerometer ...