I Have build V3.1 rotator and for fix a bug of elevation i had to reflashing firmware of arduino pro mini ( a chinese version).
I had almost solved the elevation encoder problem but … I burned something.
It went like this
I programmed a new arduino pro mini with the updated firmware, I put it in place of the pro mini sparkfun and magically everything worked perfectly, the azimuth and the elevation worked correctly and both encoders worked very well.
Then, in the next ignition of the rotor, the LDO regulator exploded, I think it happened, because probably it was a Chinese clone.
So I tried to update the pro micro original but I could not because it probably no longer load the bootloader and with my FTDI 232 or arduino one I could not do it.
However, once put back on the pcb, the board does not seem to work anymore, probably damaged by the previous Chinese pro-Arduino when it is burned.
In fact, testing point 2 as from wiki pre flight no longer arrive 5v while the 12v of point 1 yes.
Now then proceeding to the tests I’m sure that SMD FUSE F1 is burned too (as in the picture)
So … I had solved by reprogramming the pro mini (maybe chinese) and then I damaged everything. I am really sorry and I am very sorry to have damaged this masterpiece.
At this point, since I do not have enough skills in electronics and I do not have the necessary equipment to desolder and replace the burned components.
According to YOU what could be burned in addition to FUSE F1 in SMD?
Not having many skills on SMD components, I have problems with fixing it
Massimiliano - IZ5RZR