I have a Mateksys MicroBEC 12S.
I will check that. this forum is so rich that i miss some parts
I would highly encourage you to spend the money on the mateksys pro BEC. I had many issues with the smaller one and I think others on here have also. Since I changed all 3 of my boogies to the pro version I never have any weird anomolies. I also keep the BREmote RX board unplugged until after I connect the battery in case of a voltage spike to the RX board.
https://www.getfpv.com/mateksys-12s-pro-bec-9-55v-to-5v-8v-12v-5a.html
Basically you run the power into the BEC from the main power pad on the speed controller, one ground to the main negative pad on the speed controller, the second ground from the BEC goes to the small ground pad by the signal pad in the speed controller and the power out from the BEC up to the RX board. So the only thing going directly from the BEC to the RX board is the 5v power. The signal and ground come directly from the speed controller. Hopefully that makes sense and there is a few diagrams floating around, I know I posted on jdubs dual motor boogie topic if you search.
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I have ordered 2 BEC Pro . Not very expensive
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