Hi

I wired 4 Diatone Mamba LED sw401 strips to the Mamba FC F7 at each corner as indicated in the Mamba wiring diagram. I checked the soldering, made sure that the 5v was with the 5v pad, ground to ground and signal to signal in on each LED strip. Plugged in the 4s Lipo.
But no lights, nada. 

LED lights is on with beta flight. I also configure the 4 strips. I tried the  small button on the FC. It is supposed to change the lights. But nothing, nada, no ligt.

Do any of you has any idea?

Thanks

Fizou

How did you configured the LED? Remember that all the LED will flash the same way. So you are only addressing 4 leds and not 16 leds.

The LED strips should work without the need to use Beta Flight. There are some videos that show them just soldered to the FC and working when you plug in a Lipo..
Could it be that I was using the SW401 LED instead of the SW601 LED as in the Mamba diagram? Is there a difference other than the number of small LED on the strips?

Thanks

Fizou

I have the same FC and also wired 4 of the Mamba flashbangs to the LED pads on the corner of the FC. Using those corner LED pads allows you to only control the LEDs using the button on the FC. It's kind of stupid but I confirmed that with Diatone themselves. You'll notice there's another set of LED pads on the FC marked "BF LED" - that can be controlled via Betaflight.

Now as to why your LEDs do not turn on I'm not sure. You have tried pressing the button?

(01-Feb-2020, 07:08 AM)the.ronin Wrote: I have the same FC and also wired 4 of the Mamba flashbangs to the LED pads on the corner of the FC.  Using those corner LED pads allows you to only control the LEDs using the button on the FC.  It's kind of stupid but I confirmed that with Diatone themselves.  You'll notice there's another set of LED pads on the FC marked "BF LED" - that can be controlled via Betaflight.

Now as to why your LEDs do not turn on I'm not sure.  You have tried pressing the button?

Hi,

Yes I have used  the small button, the one below the boot one. No luck. I was just wondering if I used the right kind of LED strip;  I used the one called SW401. The ones attached to the 4 corners on the Mamba FC wiring diagram are SW601. I ordered a set of 601 from Banggood, will wait two weeks. Any how thwe weather here in BC is kind of "humid"  so no flying yet.
Thanks

Fizou

The SW601 is just the 6-LED version of the SW401. Both contain WS2812B serial programmable RGB LEDs and work in exactly the same way by passing on an instruction to the next LED in the chain (if another exists). So if the 4-LED SW401 strips aren't working then neither will the 6-LED SW601 strips.

Assuming you definitely wired them up correctly then it sounds like there may be a fault with the onboard LED controller on your Mamba FC.

Thanks, I will check the wiring gain... I already checked it 4 or 5 times........... another time wont hurt.
I emailed Diatone, their answer was that the large pads were for the ESC and the small pads for the LEDs only. No idea what they were talking about, all the soldering pads are the same size to me.

Fizou

Yea mine was quite literally plug and play. In fact, I was a bit annoyed that there was actually no way to turn them off with the button so much so that I just uninstalled them lol.

Hi again

My mistake.... There are indeed 2 sets of soldering pads on each end of the LED strip. some "large ones" on the edge of the strip and some very small round ones a small distance from the large ones
I used the small ones and it is working. Got do the three other arms now.

Thanks

Fizou

That's good news that you now have them working Sometimes it just comes down to the simplest of mistakes for the frustration to kick in.

For anyone else who comes across this thread with the same/similar issue, Whirly Bloke has a great video which shows them in action and how to connect them up...

Thanks , I did see this one. The thing is these LED strips are lmist -lug and play, no need to solder the wires on the strips.

Fizounet

This thread just solved my same problem! Thank you.  I have the same FC and Flashbang SW401 with ESC pads on very small circle pads further inside the LED board.  I soldered the independent LED pads on the FC to the ESC pads of the LED boards and nothing worked.  

I read this thread and fired up the soldering iron and wallaw!   The LEDS came on once VBAT was applied and controlled with the odd-onboard FC LED button found just below the FC Boot button.

I do see a separate pad near the computer plugin for LED and assume this is the BF pad allowing for further configuration.  I'll have to test that when I get bored!

Till then - thank you for your post!

I just had a similar case with my Mamba f722 app flight controller.
Turns out there are 3 pads on the board and you need to connect two of them to get either Mamba or Betaflight controlled LEDs.
By default none of them are shorted!