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Search: Posts Made By: danvel
Showing results 1 to 25 of 262
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Forum: Multi Rotor Helicopters
12-07-2008, 11:39 AM
Replies: 3,266
Views: 358,675
Posted By danvel

RE: Building a DraganFlyer - need to mix speedcontrollers - HELP

I'm fine, thank you guys for asking.
I'm not very active in this forum right now because I got tired of flying my quadrotor and wanted to try new things.
In fact, I took the "brains" out of it...
Forum: Multi Rotor Helicopters
12-06-2008, 05:35 PM
Replies: 3,266
Views: 358,675
Posted By danvel

RE: Building a DraganFlyer - need to mix speedcontrollers - HELP

Yes, it's cool and terrible at the same time.
It looks to me as a weapon to send somewhere to kill everybody around.
The beauty of the technology shows its sadest face when it's used to kill.
...
Forum: Multi Rotor Helicopters
11-03-2007, 12:05 PM
Replies: 3,266
Views: 358,675
Posted By danvel

RE: Building a DraganFlyer - need to mix speedcontrollers - HELP

Hi again, my friends. I've designed a new strange flying craft using the same electronics as the 4rotor copter. I call it "TUBOPTER" because it's shaped as a tube. You can have a look at it at:
...
Forum: Multi Rotor Helicopters
11-03-2007, 11:59 AM
Replies: 2
Views: 2,278
Posted By danvel

TUBOPTER

I think this idea is original. If someone has seen something like this before please tell me. I call it "TUBOPTER".
The heart of it is a "counterotating" brushless motor beatifully handcrafted by...
Forum: Multi Rotor Helicopters
06-23-2007, 04:49 PM
Replies: 3,266
Views: 358,675
Posted By danvel

RE: Building a DraganFlyer - need to mix speedcontrollers - HELP

Yes, the response time depends on the ESC but the motor has a physical limit as well. The maximum acceleration is proportional to the peak power available and inversely proportional to the prop...
Forum: Multi Rotor Helicopters
06-20-2007, 02:23 PM
Replies: 3,266
Views: 358,675
Posted By danvel

RE: Building a DraganFlyer - need to mix speedcontrollers - HELP

Hi, anthrax.
I use rev2210 motors with kv=1060. These are perfect for my 450g cuatricopter with 2s lipos as they lift it at a low throttle level.
But talking about stability, I get an average of...
Forum: Multi Rotor Helicopters
06-09-2007, 05:09 AM
Replies: 3,266
Views: 358,675
Posted By danvel

RE: Building a DraganFlyer - need to mix speedcontrollers - HELP

Do you mean to switch everything on and off? I never used one. Just good quality DEAN connectors. I've seen people install car-type fuses in their planes so they just put the fuse to switch on and...
Forum: Multi Rotor Helicopters
06-08-2007, 11:49 AM
Replies: 3,266
Views: 358,675
Posted By danvel

RE: Building a DraganFlyer - need to mix speedcontrollers - HELP

Be careful with that assumption. It's only true while a human is piloting and trying to keep the thing horizontal. For stand-alone hover, you can discard a real turn for being "too" slow. That's...
Forum: Multi Rotor Helicopters
06-06-2007, 03:12 PM
Replies: 3,266
Views: 358,675
Posted By danvel

RE: Building a DraganFlyer - need to mix speedcontrollers - HELP

Congratulations, Merijn.
Just some hints about your software bug:
1.- Make sure it's a real bug and not noise from the radio receiver. Try another receiver, re-route the antenna, etc...
2.- Do...
Forum: Multi Rotor Helicopters
02-23-2007, 04:52 PM
Replies: 3,266
Views: 358,675
Posted By danvel

RE: Building a DraganFlyer - need to mix speedcontrollers - HELP

I used the MMA7260QR2 from freescale (free sample). It has all three axis, works fine and is small and lightweight but you may have problems soldering the extremely small pads of the package. With...
Forum: Multi Rotor Helicopters
02-16-2007, 04:07 PM
Replies: 3,266
Views: 358,675
Posted By danvel

RE: Building a DraganFlyer - need to mix speedcontrollers - HELP

That's an interesting approach, ADI. However I'm not convinced that the resolution with interrupts is poorer because the overhead (wasted time) from interrupt request to service should be always the...
Forum: Multi Rotor Helicopters
02-10-2007, 04:50 PM
Replies: 3,266
Views: 358,675
Posted By danvel

RE: Building a DraganFlyer - need to mix speedcontrollers - HELP

Congratulations, merijnwijnen. If this is your first microcontroller and analog electronics project I must say that your progress is amazing.
Best luck.
Forum: Multi Rotor Helicopters
01-27-2007, 03:37 PM
Replies: 3,266
Views: 358,675
Posted By danvel

RE: Building a DraganFlyer - need to mix speedcontrollers - HELP

Yes, I'm one of those who sample at 50Hz syncronised to incomming PPM radio signal and I low pass filter the gyros at a cutoff frequency of about 13Hz. Believe me; that's fast enough for a "normal...
Forum: Multi Rotor Helicopters
09-24-2006, 03:47 AM
Replies: 3,266
Views: 358,675
Posted By danvel

RE: Building a DraganFlyer - need to mix speedcontrollers - HELP

I've seen some laser range finders that use a linear array of detectors instead of a single one (like a camera CCD chip but 1 dimension) and they calculate the distance by triangulation. I've also...
Forum: Multi Rotor Helicopters
09-19-2006, 04:29 AM
Replies: 3,266
Views: 358,675
Posted By danvel

RE: Building a DraganFlyer - need to mix speedcontrollers - HELP

When you say 300' (=7,62m !) do you mean reflecting on a normal wall surface (like bricks or white paint)? Or you used a specific reflector or mirror. The diference is huge!. That's why I think we...
Forum: Multi Rotor Helicopters
09-18-2006, 11:17 AM
Replies: 3,266
Views: 358,675
Posted By danvel

RE: Building a DraganFlyer - need to mix speedcontrollers - HELP

Yes, the cause may be some combination of what you point out, but the fact is that I couldn't make it work properly. Infrared could also be used, but reflective sensors with IR leds usually "see" not...
Forum: Multi Rotor Helicopters
09-18-2006, 06:55 AM
Replies: 3,266
Views: 358,675
Posted By danvel

RE: Building a DraganFlyer - need to mix speedcontrollers - HELP

1.- Thanks for your comment. I'm glad you liked it. In fact, I had a rotating head with ultrasonic proximity sensors working during that test (it is difficult to see in the video due to poor image...
Forum: Multi Rotor Helicopters
09-17-2006, 02:09 PM
Replies: 3,266
Views: 358,675
Posted By danvel

RE: Building a DraganFlyer - need to mix speedcontrollers - HELP

1.- I managed to keep altittude within about 1 m with the barometer. Watch this video (fully autonomous flight).
http://video.google.es/videoplay?docid=-1863998539181271810&q=cuatricopter

2.-...
Forum: Multi Rotor Helicopters
09-17-2006, 10:01 AM
Replies: 3,266
Views: 358,675
Posted By danvel

RE: Building a DraganFlyer - need to mix speedcontrollers - HELP

I used the MPXAZ4100A6U (about 15$ at digikey).
Forum: Multi Rotor Helicopters
09-16-2006, 04:38 AM
Replies: 3,266
Views: 358,675
Posted By danvel

RE: Building a DraganFlyer - need to mix speedcontrollers - HELP

Hi, thorn. You are right about the throttle steps; they're some kind of a hassle. When you try to keep a constant alttitude you'll surely find yourself switching between two steps.
However, I don't...
Forum: Multi Rotor Helicopters
07-16-2006, 02:18 PM
Replies: 3,266
Views: 358,675
Posted By danvel

RE: Building a DraganFlyer - need to mix speedcontrollers - HELP

Nice to see you active again tve. And, yes, I still use the rev2210 DIY brushless motors from aircraft world with Phoenix-10 ESCs.
Forum: Multi Rotor Helicopters
07-08-2006, 05:55 AM
Replies: 3,266
Views: 358,675
Posted By danvel

RE: Building a DraganFlyer - need to mix speedcontrollers - HELP

Very nice board, Bizart. What is its size and weight?

To all:
Have you ever realised that it normally takes 4 active elements to achieve all degrees of freedom (throttle,pitch,roll, yaw) in...
Forum: Multi Rotor Helicopters
07-05-2006, 01:24 AM
Replies: 3,266
Views: 358,675
Posted By danvel

RE: Building a DraganFlyer - need to mix speedcontrollers - HELP

Wow. These German guys have guts!.
Now we know that loops are possible, but I don't trust my fingers and eyes so as to try it with my cuatricopter.
Forum: Multi Rotor Helicopters
06-30-2006, 11:27 AM
Replies: 3,266
Views: 358,675
Posted By danvel

RE: Building a DraganFlyer - need to mix speedcontrollers - HELP

Bizart: It's incredible that you can glue the broken props like that! What glue do you use?

-Some videos I had not shared yet uploaded to the new google video service:

My longest autonomous...
Forum: Multi Rotor Helicopters
06-24-2006, 04:14 AM
Replies: 3,266
Views: 358,675
Posted By danvel

RE: Building a DraganFlyer - need to mix speedcontrollers - HELP

Yes, I've been side tracked too. And we're expecting a baby that will be born next august. I believe that she'll be a powerful side-tracker too;).
My rotheli is finished and it flies, but man, the...
Showing results 1 to 25 of 262
 
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