LibrePilot Forum
General Category => General Discussion => Topic started by: Daxo on May 24, 2016, 06:33:44 am
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Just saw this CC3D v2 with bec, looks promissing: http://www.banggood.com/CC3D_V2_0-CC3D-V2_0-Flight-Controller-with-5V12V-BEC-for-FPV-Racer-Multicopters-p-1055780.html?p=O521051806009201506W
Thinking to order one to check it out, what do you guyz think?
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Interesting combination.
It's hard to tell some things from rendered images instead of photos but it looks like two of the mounting screws may be connected to battery power. Not a problem with nylon standoffs and screws anyway, just a personal preference. The TBS Powercube actually uses the standoffs to transfer battery power between the boards.
The only other thing that comes to mind is I'd have liked it to have had pads or connectors for the other two servo out channels so they could be used for buzzers, etc.
Since they're inexpensive I just ordered one to look at.
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Just ordered one as well, the 5v and 12 v bec and nicely placed signal pads are worth checking out, mostly I fly quadcopters and this seams very practical to me.
Tho, I do agree it would be nice to have all 6 signal pads.
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I wonder could those VCC pads support 2x ESC's.
On my micro with 4inch BN propellers my 1806 spend around 8 Amp tops per motor, not sure are those traces wide enough to power 2 motors at the opposite side of the Battery In+2 motors direct + - solder side.
That's tops 16 Amps going true the board VCC traces at full throttle, and that would probably go down to 11-12 Amps if i use regular curved tip propellers.
Wish they would had a bit bigger images of the circuit, if this thing could serve as power distribution for the esc's as well on a micro, it certainly would make every gram of weight worth a while.
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Hm... ofc I already started thinking to design 'Ironman suite' PCB that would adopt the FC board in some neat little micro frame but a second later, why bother.
I'm not an EE and would certainly appreciate more knowledgeable folks opinion, is there any possible issues with grounding back loop to the FC circuitry?
I guess it could be only a matter of nothing more than bridging the opposite VCC + and - separately with say light 16AWG wires to add ESC power routing 'feature' as well?
Would something like this work?
(https://forum.librepilot.org/index.php?action=dlattach;topic=1687.0;attach=3166;image)
(https://forum.librepilot.org/index.php?action=dlattach;topic=1687.0;attach=3164;image)
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Officially I'm also not an EE, but even though those traces seem to start out nice and fat, it's still a pretty small amount of copper and the negative one seems to get pretty thin half way trough.
Soldering some nice properly thick wires to the back should work as long as you can get the solder to stick to those vias, which will probably come with solder mask on them.
I wouldn't worry about creating any ground loops by doing so. I'd be more concerned with the proximity of switching regulators to the MPU sensor chip (still, it'll probably be just fine...)
However, one thing I really do like about this board is how they've put vias on all the pads, that will have a wire solderd to them, so if the wire gets pulled, it is less likely to take the trace of the PCB because it's anchored to the base material.
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That's a very good point Nitro,
Guess I was assuming that those are the Through-Holes, I used the same principle to get that benefit of having a place where the solder could stick better and ofc possibility to transfer the connection of the pad to the other side.
We'll find out which one is it when it arrives, cross fingers :)
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Very interesting FC. I always have problems with PDB placement. This looks like my problem solver. Has anyone held this "innovation" in hands already?
Anyway being influenced by a total hysteria around this, I have ordered a couple of those. 8)
(Have you ever thought about an assumption that all of us, hobby people, are just shopaholics with a hobby excuse? ;D)
-K.
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No not yet, I ordered one to look at on the 24th right after Daxo posted the link. The shortest one of my Banggood China orders has taken is a week, most take around two weeks. Very small packages tend to arrive quicker so I usually place multiple small orders instead of large ones.
I'm not a shopaholic, I need all this stuff :)
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Just checked my package, it should be here in a few days now.
Can't wait to check it out!:D
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Finally decided to switch to new Frsky receivers, certainly not cheap but seams to be the smallest and lightest Sbus-Cppm full range receiver and no need to de-pin it for slim profile.
I didn't even know about it till i saw it today on my buddy's quad, it's brill! :)
(https://forum.librepilot.org/index.php?action=dlattach;topic=1687.0;attach=3226;image)
I got it here, since I'm from Europe i didn't want to risk getting the wrong fw flashed for my EU Taranis. This is by far the best store in EU for this stuff imho.
http://rclife.co.uk/Frsky-RC/Frsky-Receivers/Frsky-XSR
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The CC3D v2 arrived so thought to share first few observations.
The board seems to be of higher quality than usual CC3D offerings and comes in 2mm thick board and uses Micro usb port which is very nice!
Correction: Seems to be 2oz copper board.
(https://forum.librepilot.org/index.php?action=dlattach;topic=1687.0;attach=3308;image)
unfortunately, the solder pads use Vias instead through holes I was hoping for, wont be a problem tho..
(https://forum.librepilot.org/index.php?action=dlattach;topic=1687.0;attach=3310;image)
On my surprise the package came with plastic mounting hardware which is a really nice touch for the price.
(https://forum.librepilot.org/index.php?action=dlattach;topic=1687.0;attach=3312;image)
Actual FC board weight:
(https://forum.librepilot.org/index.php?action=dlattach;topic=1687.0;attach=3314;image)
Flashed with latest LibrePilot 1509 FW, the board seams to work as intended.
GCS downloaded from https://librepilot.atlassian.net/wiki/display/LPDOC/Downloads
(https://forum.librepilot.org/index.php?action=dlattach;topic=1687.0;attach=3316;image)
Only thing to do now is to build the quad and check how it behaves in flight and are the Bec's working per spec.
Update coming soon...
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Hi folks!
Got mine and have a question, what for there is this tx pad next to battery pad? The only idea I have is that for transmitter signal wire as there is a similar pad for on the other side for camera... If it is so, they should have added an OSD to this board :)
Thanks.
-K.
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I stand corrected, just measured both pads, the ground is shared with the power so it seams, the middle pads don't serve as power and might as well serve as signal.
Will check that when I get back to the build.
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Just so the info will be here for future reference, the SBL jumper on this board isn't really labeled well. Someone over at RCG asked so I traced it out and made a picture.
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Good to know, thanks for the tip H :)
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We're is the - pad in the 5v and 12v
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This is the first I saw this thread. It looks to me like it doesn't have any hardware for battery voltage/current monitoring. Is that right? It's a shame if so. It seems like an obvious and simple thing to add, but I guess they didn't add it since the original CC3D doesn't have a C/V port.
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No, it's just a stock cc3d with only 4 servo outs wired and with a couple of BECs on the back.
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We're is the - pad in the 5v and 12v
The ground( - ), is shared between all power related pads on the board.
This basically means, for either of two, 5 or 12V pad, for grounding( - ) you can use any of the pads marked as ' - '.
Hope it helps.
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This is the first I saw this thread. It looks to me like it doesn't have any hardware for battery voltage/current monitoring. Is that right? It's a shame if so. It seems like an obvious and simple thing to add, but I guess they didn't add it since the original CC3D doesn't have a C/V port.
Yea, thought the same thing really.
The board has plenty of space to go around and they could at least, place two smd resistors for voltage dividing and add tiny pad for telem.
That would be a very cool thing to have on board yet it costs nearly nothing production wise.
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I also have these board on my G160 ready to fly, the day I got it I flashed it with 15.09 but didn't go thru the transmitter wizard cause I didn't have my receiver yet. now that I have everything good to go and plug it in so I can configure thru transmitter wizard, all of the sudden LibrePilot GCS stop working, what gives? I don't get it, its working just fine 4 days ago.
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Hi Folks!
I have built a couple of 210 based on this board and I got a small question. I need to setup a search buzzer and usually I would use one of the outputs, but this board has only 4. I know that receiver port can take PPM as input and at the same time output channels 7-10 to the rest of the pins. But wiki says: For a Multirotor, please use the PPM_PIN8+OneShot described bellow, this allow PWMSync and OneShot. Is this just a kind suggestion or this is "must use" for multirotor?
Thanks,
-K.
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you can do this:
buzzer signal to receiver port pin8 (last pin). This is channel 10!
in Librepilot hardware: PPM+Outputs+NoOneShot
hope its helping
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OneShot is a "must use" for multirotor.
Another solution is use the FlexiPort as PPM input (allow OneShot) and ReceiverPort as Outputs.
Here is the receiver pinout:
https://librepilot.atlassian.net/wiki/display/LPDOC/CC+Hardware+Configuration#CCHardwareConfiguration-ReceiverPort
(https://librepilot.atlassian.net/wiki/download/attachments/2818090/CC3D_PPM_flexi.png)
(https://forum.librepilot.org/index.php?action=dlattach;topic=1687.0;attach=3694)
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Thanks for the answer!
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A bit of topic,
anyone knows where I can find the Motor Scaling in the flight mode settings in system tab? Appreciated!
It was there before, tho it seams I can't find it now.
GCS 15.09
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I don't know what do you mean with Motor Scaling...
What GCS version where you find that in Settings > FlightModeSettings ?
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Hi Laurent,
I think the last time I used this was on Alpha release, before I switched to 15.09.
it was recommended to me to set the motor scaling to add and subtract.
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So this parameter is removed, default is scaling.
And Throttle curve can be set to 100% max instead of 90%
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Oh, I see. I was concerned but tbh, I just packed up the power train section and went for a test flight, there seams to be no difference what so ever in flight no matter how hard I pushed it:)
Thank you for the help mate, I feel more confident about my build now! Appreciated!
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Hi folks!
I have tried to setup PPM on flexi port and outputs+oneshot on receiver port and board would not even boot up with such configuration. With disabled+oneshot it did boot but would not read PPM from flexi. I am on 15.09 now. Does anyone use ppm on flexi port? I guess I should start a new topic about this problem, but at first I would like to take a chance here=)
Thanks,
-K.
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yes, me.
i use PPM on flexi.
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yes, me.
i use PPM on flexi.
Really, it does not boot at all with only green light on. Strange. I think I am going to try this with another board :)
Update: Tried it with another cc3d (the same v2) I have and results are similar. Could you please take a look on my cfg - it might be I am doing something wrong. Thanks in advance.
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Can you please share a screenshot of your Hardware tab and a picture of your CC3D wiring?
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No issue with your config file.
In some cases if you send PWM on PPM input pin the board do not boot.
Be sure the wiring is correct, or remove all wiring to check if board boot first.
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Folks,
I use taranis d4r II and I am sure it outputs ppm as it was connected to receiver pin8 a minute ago and flyable (shorted pin3 and pin4).
What I do is I replace receiver pin 8 with flexi pin 4 (+5 and gnd does not matter - have tried both as suspected power issue), setup board as in my previously attached uav and it does not boot up with battery connected. Strange. I think I am going to try to setup the same on a regular cc3d as I have one somewhere on shelves...
Thanks guys for your inclusion!
-K
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Be sure the PPM servo connector is on the right place.
If connected to the PWM Rssi, this lock the board or do an instant reboot if connected after running.
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Probably a dumb question but better to ask than be sorry later..
My beta prototype is inbound for final tests before the production unit for which I plan to go with RS2205's and with either Littlebee's or RacerStar escs for the build.
Does anyone by any chance had any experience with BLHeli_S fw and CC3D, Racestars support oneShot42 as well, does it work?
Any info is Highly Appreciated!
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Just wanted to add why the dilemma, Folks say they work equally smooth as littlebee , yet the racerstar are at 20% discount right now, at 10$, for 4 that's like 20$ left in my pocket :)
http://www.banggood.com/Racerstar-RS20A-20A-BLHELI_S-OPTO-2-4S-ESC-Support-Oneshot42-Multishot-for-FPV-Racing-p-1063904.html?p=O521051806009201506W
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OneShot42 or MultiShot are needed for fast loops.
You should only need OneShot125 and didn't notice any change using OneShot42.
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Other than these protocols, I shouldn't have any issues with BLHeli_S firmware right?
Huge Thank you Laurent for all the help!
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Found few threads about it, gonna order a set to check it out. :)
Will report back how it works.
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Finally got this V2 into my prototype, I find it very practical for this kinda stuff where you just want to build the model asap and begin crash testing, works perfect as any other cc3d flashed with LibrePilot! Love it! :D
Basic Beginner stock generic settings.
Quad Handling Test Flights;
https://www.youtube.com/watch?v=WKcxhE_vNxw
https://www.youtube.com/watch?v=Q6oYrLjPv4A
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Hey I've mine set up and I'm getting very bad lines in my camera feed what can I do both vtx(12v) and camera (5v are been powered from the board
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Video lines only when the motors are running at hover power or higher?
You could power the camera from a separate 5v battery for a test and then the Vtx from a separate 12v battery. These tests will help figure out where you need to add filtering.
Last test would be to move the vtx transmitter and antenna around to see if that helps.