Upgraded Furibee X140
By Snorkl FPV on Jul 10, 2018
I used a 20x20 stack plate to mount VTX on top and RX on the bottom. There are 6 servo connector pins protruding from the FC where the stock VTX used to plug into. Since there is a lot of space in this frame I did not bother desoldering or cutting them but used longer nylon standoffs instead.
The drone uses F.Port on UART 1.
Gearbest used to sell the frame seperately but seems to have stopped doing so.
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I see you've used the SPC maker 20x20 F3 FC and 20A 4in1 ESC.
I am looking at using the same pair (just ordered from Banggood but not yet arrived) for a project of my own (replacing F4 FC and individual ESCs - saves a lot of weight). I am a bit concerned about the wiring of ESC to FC.
Info on Banggood site says power, gnd + the 4x ESC signal lines all come via a (supplied) 6 pin loom between the two. However, found a youtube video of someone who fried the FC doing that. Then looking at some FC pictures, seems to imply the +V connection of the FC is for +5V, but also others that the ESC actually puts VBAT (ie 12V with 3s) on that connection.
That would certainly kill the FC if it was expecting 5V and got 12V.
On the other hand, if the ESC genuinely puts out 5V, not 12V, then VBAT monitoring would not be possible on the FC (because it doesn't see VBAT).
Don't want to make an expensive mistake, so wondering how you wired it?
The FC is specified for 2 - 4S input voltage (so 17V max) and gets power either from the 4in1 ESC via a 6-pin cable from the 4in1 ESC (which I used) or directly from the battery. I do not know what caused the FC on the video to fry but I run this combo on 3 quads on 4S without any problem so far. There is a layout diagram on SPCMaker's website.
https://www.spcmaker.com/spcmaker-vx86-1-ominibus-f3-flight-controller-integrated-with-osd-module-p0058.html
Thanks for that, it is what I hoped to hear. What slightly worried me was (a) the youtube video and (b) I had a feeling I had somewhere seen a drawing marked +5v not VBAT for that pin. Made me wonder if there were two versions of the FC.
I also see you are using an R-XSR as I am also intending, but with F. Port as opposed to SBUS / S. Port. I assume you got the uninverted S. Port from the pad on the R-XSR, as opposed to the S. Port connector pin?
I changed the R-XSR to an XM+ a few months ago. I think I used F.Port as I do on all my telemetry enabled quads but I do not remember exactly how I did it. I think you are right, I probably used the tiny uninverted pad on the R-XSR. What I do remember is that telemetry worked flawlessly on this quad but since it is just a basher quad I put the R-XSR in another quad and ran with an XM+.