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Matek is upping their game and just released a new F4 micro FC. This is the most advanced and feature packed micro FC yet. It is presently the only nano board to feature the ICM-20602 gyro, which necessitated the rubber grommets. It is capable of both M3/M2 mounting screws and is smartaudio/camera control capable. There is a special full size PDB designed to mate with it. I found only one site presently selling it for $30, which is the same price as the Matek full size FC. I have two Matek F4 FCs and they work flawlessly, and this might be my new go-to nano board. Info and seller links below.
http://www.multirotorguide.com/news/matek-f405-mini-fc-and-fchub-a5-pdb/
http://www.myrcmart.com/matek-betaflight-flight-controller-f405mini-p-11716.html
http://www.mateksys.com/?portfolio=f405-mini
Comments
i like it but curious how logically the pins are laid out since they are spread out across both sides of the board.
There is actually some logic to the layout. The full size FC is similarly laid out. The bottom pads are designed to wire up to a PDB or ESC so you can clamshell the FC and hide the wires. The top pads wire up to a buzzer, RX, Cam, and VTX, stuff that normally is on the top side of the quad.