MultiWii

mr.rc-cam wrote:Data sheets that were published *before* 2010 will have some basic information about Mode 2.

Thanks, I see that now in the preliminary datasheet - ultra low noise with reduced bandwidth (150Hz from normal 1200Hz), very interesting indeed.

I have a couple of questions - what does that line above do?


and what is Mode 2?
According to BMA180 datasheet it says - Not recommened.

Aaaarrggh, those quad-grabbing magnetic trees!
I know them...

Looks like there is a problem with the sixth wire/connector which is DTR signal, it resets the processor to start the bootloader. That's exactly what you do manually but the timing is critical. Check you wiring/pin/socket/etc., cannot give more specific advice since I don't know which FTDI adapter y...

works normally so is the NK if I cut the NK in the middle? can solve the problem? What type of Nunchuk? There are gazillion of different nunchuk boards. How do you power it? Some can take 5V fine, some need no more than 3.3V. I'm afraid that сutting it in the middle will just create more problems s...

First time software runs dynThrPID is assigned value of 0, then it is read from the EEPROM (hint: look into EEPROM.pde)

Yes and no. Yes, after the 3205 mod you have to connect standalone Nunchuk in parallel like shown on the picture. And no, you have to power 3205 (and probably Nunchuk also) with no more that 3.5-3.6 volts. Powering it like on the picture with 5 volts from Arduino will mess up the output data badly. ...

yay! so you're basically half way thru already. I actually had to change the setting for the LPF filter from 256HZ to 10HZ, otherwise my quad was very unstable, I guess because the gyro was picking up some vibrations from unbalanced props/motors thru the frame, and I didn't have a good dampening foa...

Start with just the gyro, do not connect Nunchuk yet and make a gyro work first.
Make sure you follow all the steps for the ITG3205 modification as I describe it in my blog post.

One idea I can come up with would be to utilize such a feature of some modern accelerometers (for instance BMA180) as capability to detect a shock situation up to 16 g. In that case shock alert interrupt signal can be used to shutdown the motors immediately. That of course would require some researc...

Well, looking at the picture that shouldn't be much of an issue then, seems to be enough airflow around sensors... don't know what else to suggest. You can check the drift by connecting it to GUI and just leave it running for a few minutes watching the graphs/values. Also you can just put your finge...

Well, I really don't know what to suggest because I think the reason why the copter did not respond to stick input is still unknown... right? I doubt it was a main loop that crashed, microprocessors a usually very robust and keep ticking until the power is lost, but if the power was lost then PWM on...

but I'm not really sure what do you mean - my approach to what problem?

My guess would be temperature drift. What sensors do you use and where are they on those pictures? I can't really tell from the pictures what is where...

Guys, sorry, I didn't mean to sound negative. We are all DIY-ers and all love our hobby and all like to tinker with the stuff. We just do some things differently either from our own experience or from experience of others, and we share that experience in the forums, that's what the forums are for. I...

That is your Option and LIABILITY. http://www.youtube.com/watch?v=k7Ita1mFMB4 That's exactly right, and that's why looking at how some people do a soldering job and knowing what is inside a 10 dollar motor with windings all over the place touching each other and rubbing against sharp casing of a mo...

You dont use a separate UBEC do you? Nope, I don't, just don't see a need when a whole electronics including receiver, MWC, bluetooth, and whatever else, hardly pull 200mA total at max, I do not have any high current digital servos like on a single rotor heli that can spike up to several amps and w...

fuses? another point of failure? watching you quad tumbles down helplessly because of a gust of a wind that caused an overdraw current spike in accelerated motor which will be harmless for controller but will blow the fuse? have you ever seen the fuses on any helicopters? they do not glide really we...

I agree with captaingeek and copterrichie, but would suggest another solution that works for me. Set the minimum throttle to a such value that motors will run with a minimum possible speed (in my case it is 1100). In that case when you block the props with something like grass, your fingers, or any ...

First, I'm using an old lappy with Win XP so I can play in the shed and not run into the house every minute, but the GUI keeps locking up on it and I have to re-boot to get the lappy to work again does this no matter how long I wait after selecting COMPORT and then waiting to press Start. Every tim...

100kHz - 692 uSec 400kHz - 616 uSec I'd hate to tell you that those numbers are a little bit off. There is no way that reading 23 bytes will take such a short time. Let's do some math: at 100kHz one bit takes exactly 1/100000 = 10us, so one byte with start, ack, and stop bits will take about 100us....

That wheel is even older:
http://www.rcgroups.com/forums/showthread.php?t=964184

http://www.arduino.cc/cgi-bin/yabb2/YaB ... 1231185714