CC3D current requirements

[NorcoT]

Hey all, so iv recently added some RGB LEDs to my CC3D running cleanflight. So far the bench tests are fine but i thought id come for some advice.

So the LED strip with 6 LEDs are connected to the same 5+ and GND rail as my CC3D is powered from, both of which are supplied by a 5v BEC capable of supplying 1A.

From literature it seems that each LED can draw a maximum of about 50mA, so for 6 LEDs the max current draw should be 300mA.

What im wondering is what the supply current requirements for powering the CC3D are? Im guessing they are going to be less than 700mA in which case im fine using the one BEC to supply power to both LEDs and the FC.

Anyone else checked this before?

[NorcoT]

Also my speksat is connected to thw CC3D serial and from what i can find that draws a further 30mA so that leaves 670mA for the FC.. Surely thats more than enough plus some?

[Paul01]

I wouldn';t recommend running LEDs from your CC3D as it could cause a brown out which would cause your quad to fall from the sky. Put the LEDs on a second bec, again I wouldn';t use the bec on one of your ESCs.

[atomiclama]

Just measured mine at 50mA

[NorcoT]

Just measured mine at 50mA

Thanks atomiclama, very good to know!

I wouldn';t recommend running LEDs from your CC3D as it could cause a brown out which would cause your quad to fall from the sky. Put the LEDs on a second bec, again I wouldn';t use the bec on one of your ESCs.

The way it is set up currently is that I have an old ESC which im using as a BEC (so its not actually connected to or powering any motors). This is connected to the CC3D through spare motor pins on the FC (Motor 6). Currently my LEDs are connected to the Motor 5 pins on the FC.

From my understanding the 5+ and GND pins on the the FC Motor Pins are on common rails, so this should mean that the LEDs are drawing power from the BEC and not actually ';through the CC3D';?

Failing that I will connect the LED 5+ and GND directly to the BEC, but I plan to use the single BEC as I';m short on space, hence why I want to check the current draw is acceptable. My thoughts were that this would effectively be the same as it is setup now as the 5+ and GND on the CC3D motor pins are on common rail?

[atomiclama]

From my understanding the 5+ and GND pins on the the FC Motor Pins are on common rails, so this should mean that the LEDs are drawing power from the BEC and not actually ';through the CC3D';?

Correct