[dan.k]

What is the accepted input voltage for the CC3D? OPWiki docs indicates 4-15v on the middle servo pin, but my dead CC3D indicates that is not true. It worked well at 5v, but it seems 12v killed it.

[f5soh]

Original CC3D (3years old) can work at 15V.
Clones using different voltage regulator do blue smoke, indeed.

If you power with 12V remember your rc receiver, gps or Osd get also 12v...

[dan.k]

Thank you for the quick response. Google results for "CC3D input voltage" are only relevant for the original and old (non-clone) CC3D.
I am writing to make sure that other's Google queries lead to this information: new (likely cloned) CC3D's ONLY accept 5v.

[f5soh]

Not just +5v but 2S battery should work fine.

As an example, current Revo clones uses a regulator that allow 10V input as max ratings.

[dan.k]

I will keep that in mind. Thank you for your quick response, I am sure others will benefit from the information.

[f5soh]

Welcome here

[Brassman]

I have the 5 volt bec connected to the reciever, mainly too have the unused cc3d outputs availeble for the future, does it matter or is it better to have the bec directly on the cc3d? thanks

[NicholasDavid]

Yes typically the 5v power plug is plugged right in to the flight controller and in turn the FC should pass through power for the Rx rceciever

[Brassman]

okay but Im planning on using the spare 2 outputs in the future, one for buzzer and one for the fpv camera auto tilt servo. the buzzer is urgent and I will try to connect it before next flight. the camera tilt can wait but Im eventualy gonna install it. I guess I could just put the positive connector from the bec into one of the esc connector middle slot and solder the ground to the same esc ground Cable. then I would not have to sacrifice an output for the bec. whats the downside of connecting the bec directly to the reciever? any known issues?

[Brassman]

ohh yeah I have yet Another question, I read in the wiki that the original OP cc3d supports 4.8 to 15 volts. I know that the clones often do not support more than 10 volts but I have the option to select 6 volts om my bec, should I use 6 volts instead of 5....4.8 volts are very Close to the minimal voltage supported and I was thinking that the reliability of the cc3d might increase with 6 volts. what do you guys Think??

[TheOtherCliff]

The input voltage (usually 5v) is regulated down to 3.3v on the board.  You need a little head room above 3.3v on the input voltage for the regulator to work.  5V works fine.  Anything more than that, up to 10v will also work fine, but the regulator will produce more heat so test for that.

Whatever voltage you feed it (5v, 7v, etc.) will be the same voltage you get out of it.  Receiver port, servo connectors (ESCs), MainPort, FlexiPort, SonarPort all are directly connected together and share a common ground and common V+.

So a main concern is whether everything you plug in can take the higher voltage too.

[Brassman]

thanks alot Cliff, then I just keep it at 5v unless I add something that will benefit from 6v. I doubt the small servo for camera tilt need 6volts.