X-Racer F303 Board, LEDs in Cleanflight

[AndWho]

Just checking voltage on the Vbatt mod... OK for 3s and/or 4s input?

The LEDs are another issue.  Am i correct in assuming that pin29(PA8) on the processor puts out data at 3.3v and the LED strip (WS2812) works on a data input of around 5v, kinda like sonar?  In that case, a couple of diodes and a 10k resistor should couple data and both get the voltage they like while sharing the same 5v power supply...

Thanks for your help, I love to build... but this damn programming thing...

Im working on feasability study for the Xracer project, looking at mods, size and weight...  I hope to come up with a "bulletproof" FC

Blue Skies, Brother
-kenny

It is the standard VBAT circuitry, used on all FC's. Good for 6S. (6x4.2/11 = 2.3V)

As said, the classic way of connecting WS2812 to a 3.3V signal is to lower supply voltage with one diod in series. Can't see how two diodes and a resistor would be connected. A non-inverting transistor stage would be fine.
/A

[hackn3y]

Hi,
Just did the VBAT and LED_STRIP mods on one X-racer F303. Works fine, not sure the mod is flight worthy even though I secured most of the add-ons with some small CA-drops... Liquid tape all over it would probably help.
I also added a 5V regulator and soldered a beeper directly to the Fc. Mounting holes are not at the std 30.5mm spacing, had to adjust them slightly, now they are bit oval. Had to order a Spektrum satellite connector separately and solder in. Quite a lot things missing in the basic design and a lot of work to get it where I want it.

Checkout it out:


More pictures here (too large for this forum):
https://dl.dropboxusercontent.com/u/1108...C_0433.JPG
https://dl.dropboxusercontent.com/u/1108...C_0435.JPG
https://dl.dropboxusercontent.com/u/1108...0Stuff.jpg
/A

Is the max voltage going to the Vbat pin 3.3V? Is there a reason I should use different resistors that would give me a voltage closer 3.3V compared to the 1K and 10K or will it make a difference?

[AndWho]

Yes, max input voltage to the chip is 3.3V. (Absolute max before things start to smell is really VDD+0.3V. Don't go there....)
The voltage divider can be anyway you want it. The 1K + 10K is the default 1/11 divider in CleanFlight Configurator. Change config to match what ever resistors you have selected.
/A

[Bandook]

Have these issues been resolved in the v2?

[CrashWorks]

Have these issues been resolved in the v2?

I don't have one on hand to test, so far they are only available for pre-order and have not been released yet.  The only difference I see so far is V2 has vbatt and RSSI pads on the bottom of the board.

[hackn3y]

They also added pins for LEDS, wish they would have done the board like this in the first place.

[Bandook]

Looking forward to a review on the v2 from Oscar .

[alanwangwang]

you can use SK9822 LED STRIP ,this led chip can be addressable and have data and clock , and it work 5V , then it can work with the X-Racer F303 using cleanflight