By double Mosfet, do you mean the one I've posted the pictures on May 19th?
I have the latest one I built installed in a 9x radio that I have just upgraded with an Ar9x board. This one has only one Mosfet transistor for both motherboard and RF power.
There is no final design as I have been for now the only one testing and using this. Andrewju did also test in the beginning and actually designed his own board. He posted a picture a few oosts above.
I didn't post further details because of the lack of interest from the community in this project until now.
![Sad :(](./images/smilies/icon_e_sad.gif)
It is hard to see people blowing up their radios when they have a solution here.
I have different designs working in several of my radios and all work. My other Ar9x board for example doesn't have the Mosfet on the charging circuit. I just modded the radio's backboard to accept switching the ground of the charging circuit instead of the positive. The Ar9x board does not originally use the charging circuit as it has the USB connector placed where the charging plug used to be.. It also uses the charging connection to the main board to bring the telemetry from the external RF Module..
I think that for the 9xtreme this latest circuit with one MOSFET for both main board power and RF module power will work fine. But of course it needs testing. It would also work well with a stock 9x mainboard.
For the Ar9x board I would probably stick with the design with separate mosfets for the mainboard and RF module power, as I had to mod the Ar9x to accept this design. I didn't really like having to do that when I have something that works fine without doing it.. But hey, we are testing right?
With this latest design I still didn't reverse the polarity on the Ar9x board, but I did with a stock 9x radio, and all worked.
Will post the eagle files (if I didn't already) for the one with the single mosfet so you can build a board and try it.
Sorry that this is not a finished project. It would already be if more people would have participated..
João
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