satya sir i  working on the VTOL dual copter project     but i cant find the firmware for the same i m useing KKV2.1

Search for and download 'kkmulticopterflashtool'. It has all kinds of firmwares including that for dual copter. I successfully flashed the monocopter firmware on my kk1 board.

thanks satya sir

what are the different types of flight control board for building quadcopter with GPS
available?
starting from the least budget to the highest...

which is the good budget control board with GPS you suggest.
thanking you for your time.
john

with gps the cheapest is multiwii

Thanks nitesh
you havent specified which muilti wii board there are many some come in combos
do they open source and help on this forum??
incase of trouble?
john

i have a doubt regarding battery , i have 16000mah with 15C. 6s,22.2v,
and i am using this for an octa coptor , the max amph of motor is 40A,
as u said for 16000 mah with 15C= 16x15 =240, where has we require 40x8= 320
my question is will it be a problem if so what is the problem ,will the battery get more heat ,or motors will not perform full efficiency, pls ans wer my question

which motor which frame which battery which esc are you using ?

Quote from: pandu chilakala on September 05, 2014, 04:02:01 PM
my question is will it be a problem if so what is the problem ,will the battery get more heat ,or motors will not perform full efficiency, pls ans wer my question

When battery drains beyond its limit, there is chance to damage it permanently. It might also affect flight characteristics as motors wont get enough power to compensate gains. Generally people use hexas and octas for heavy lift payload and considering this fact you need atleast 16k 20C battery to meet your setup requirements.

sir,i just build my quadcopter and i have done 4-5 test flights.But durning last test flight my quadcopter crashed and one cell of my "3S 5000mAh 35C" lipo battery was completely dead.Would you please guide me to compensate my voltage loss.It will be very helpful if you can guide me to choose battery to connect it to my damaged one.

Now you can remove the damaged cell and use the pack as 5000mAh 2S.

Which make and batch is your battery pack ?
If you plan to add a similar 5000mAh cell to make  3S pack again, you have to get a cell of same characteristics, may be from another pack of same capacity, same brand and model.
Getting 5000mAh single cell is hard you may get 2S pack and take one cell from it though

For those who have not noticed new firmware of RC911 released. please find below rc911 v1.6 rev4 for KK2 only


Revision 4:
-----------

* Channel mapping with support for AUX2, AUX3 and AUX4 features.
* Flight timer (displayed on the SAFE screen) runs while armed and throttle is above idle.
* A setup menu is displayed after a factory reset and whenever user profile #1 is reset. This menu is also accessible from the KK2 main menu (select "Initial Setup").
* New motor layout: V-Tail Hunter.
* LVA beep length is now limited to 1/4 second.
* RX signal handling improved. For slow booting receivers status texts like "No aileron input" will be displayed until valid RX signals are detected.
* The LVA setting is now checked upon arming from the Quick Tuning screen. This makes the KK2 LED flash if the LVA value is set too low.
* Added a second Receiver Test screen for displaying AUX2, AUX3 and AUX4 input values.
* On the Receiver Test screen, the throttle text now says "Idle" when the throttle actually IS idle. This makes the lower throttle endpoint adjustment easier.
* On the Receiver Test screen the aileron, elevator, rudder, aux2 and aux3 texts now say "Center" when these channels are centered precisely.
* The status text on the SAFE screen will now be highlighted (and flashing) when attention is needed. This also applies to the Quick Tuning screen.
* New status message: "Check throttle level" will be displayed when the throttle stick is above idle position (preventing arming).
* New status message: "RX signal was lost" will be displayed on the SAFE screen if an RX output failure occurred during flight. This will also trigger the Lost Model Alarm.
* Added a second screen to Gimbal Settings. The gimbal home position parameters are set from this new screen and they can be utilized by mapping the KK2 AUX input to AUX4.
* ESC calibration now has more on-screen (usage) information.
* When roll and pitch are linked only one set of PI parameters are displayed for "Ail+Ele".
* SL Mixed mode is now activated when the (Lost Model) Alarm function is selected. Acro mode was used earlier.
* Alarm status is now shown on the SAFE screen.
* Sanity error screen improved/optimized.
* The beep that was produced every time the AUX switch changed position will now be skipped if the flight mode stays unchanged.
* Removed code for "hidden" button (PREV) on the Show Motor Layout screen.
* Miscellaneous GUI changes and code optimizations.
* Bug fixed: Button(s) held down during start-up will no longer trigger the menu or change user profile.
* Bug fixed: Setting the Minimum Throttle value to 20 (maximum) will no longer produce a "One or more settings are out of limits" warning.
* Bug fixed: AUX switch settings appeared to be unaffected by a profile reset (when visiting the AUX Switch Setup screen before the SAFE screen).
* Bug fixed: The User Profile screen had a problem with selection highlighting after importing profile data.
http://www.rcgroups.com/forums/showthread.php?t=2340156

Hello all!
I am new on this forum and a newbie in RC stuff.
Just built a quadcopter from scratch but it seems to have a lot of problems, not flying properly, cant even level, motors not working with same speed.
My setup is:
1. 2.4G FlySky FS-CT6B 6-Channel Transmitter + Receiver (R6B)
2. KK2.1 Multi-rotor LCD Flight Control Board With 6050MPU and Atmel 644PA
3. 1400KV/1800KV Brushless Motor + 30A ESC Speed Controller + 1045R Counter Rotating Propeller Set
4. F450-V2 4-Axis Multicopter Frame with PCB Board
5. QK LIPO 2200mah 11.1V 20C/40C
6. B3AC charger
7. SF Propeller 10*4.5 SF/10*4.5

These are the things I bought and assembled. All went well, until I tried to fly it.
1. It is not balancing
2. Not even flying properly
3. Flew and hit me instead (cuts and wounds included)
4. Hit the wall
5. When I checked without the propellers I found that all the motors are not even rotating properly with same exact speed.
6. Sometimes the throttle is 30% but 2 & 4 motors are working but 1 & 3 are not rotating with proper speed, as I open the throttle more to around 60% motor no.1 gains full speed but 3 is still idle. Only when I hit the throttle full motor no.3 starts and also with less speed and after 30 secs it stops working although the others are working with full speed. I pull throttle down and again do it, the same thing happens but the motors slow down after a minute and the 3rd motor finally stops at full throttle.
I can't figure out what the problem is, if any of you experts could help me I will be highly obliged.
Thank you.

sourajit some pics or video might help but as you mentioned above it seems your ESC are not clibrated properly. they must start in sync all together so check kk2.1 manual for calibrating ESCs. once you do this check if this problem still persists or not. wear goggles and keep distance.

GIVEN INFORMATION IS GOOD BUT WHERE I CAN BUY THESE ITEMS CHEAP AND BEST ESPECIALLY TRANSISTER, IT THE COSTLIEST ITAM IN MAKING RC AND THEN BATTERY.

I bought from two websites.
Hactroniks.com
Quadkopters.com
Both provide these items quite cheap only.
And Dharmik man, I will post a video and pictures of my problems later today.

@khalsa
Hi....Regarding the usage of battery. If it is a lipo normally manufacturer gives with 3.5V for each cell. However if you will charge  it will go upto 4.2V. So the usage period of each cell is from 4.2V to 3.5V. So 3.5V is the safe voltage where you can regain to your battery utility. If any cell drop beyond 3.5V make sure you will charge immediately if it is  beyond 3.0V then your battery is in critical situation. This happens because of the reason If Your system is pulling more current than the supply. For example in your case 5000 mah 3s 35c, so max current provided by battery is 5x35=175A. If your system is pulling more than this then there is a chance of swelling of your battery and slowly damage after 3-4 flights. Although you can regain the same battery to life if you are putting the battery in balance charging mode(which is always recommended & always charge with 1c discharge rate) for long time after flight. Make sure you must attach one battery beeper with Battery during flight which will help you during flight. If the beeper starts beeping then make sure you have to land your vehicle which in turn protects your battery from damaging.
Thanks 

Nice effort Bro ... Really helpful . I appreciate your effort n hours spend for this .

Thanks for sharing such a useful information here. Ofcourse it will be helpful for my future projects.
I have some questions that what MCU board should be used to develop the multirotor?
Also what type of motors should be used and what should be their I-V specifications?

If ur motors are running at different speeds then it is an indication that ur esc are not calibrated.do it and ur problem will be resolved for sure.u can check the procedure for the same on YouTube.

Heat Shrink Tubing

Here is the full video of heat shrink tubing 40mm done on the aluminium square tube. Special thanks to Manish for providing tubes.

Final frame. 16x16 aluminium tube with heat shrinking. and custom designed xtreme v2 frame. will post full topic later

Same GF cutting from my old CNC machine?

Hi
Anyone help me my first time I am going to bullit my zmr250 quad but some doubt

Zmr250 frame
Dys1806 2300 mottor
Afro 12a opto ESC
Naze32 rav5
Marek pdb v5 low woltag alarm
Frsky d4r2 receiver
Turnigy 9xr pro
Frsky djt module
1300mah nano tech lipo
Anyone help me how can connect receiver to naze32 and ESC also

Naze 32 rav5 Bord  it s not work to directly.. It s only use after firmware flash ...?