SpeedyBee F405 Mini Flight Controller Stack board 3-6S 20x20mm Built-in Bluetooth with 35A BLHeli_S 4in1 ESC Board Support Wireless Tuning

love speedybee, Its a bit hard to solder since it's a mini board but i was able to manage, definitely should've gotten a normal size stack specially since this was my first time building but i was able to manage, just get a practice board or take your time and get a good soldering iron and flux! DO NOT underestimate having flux and a good soldering iron that gets to the right temp.i also love that speedybee has a wifi module on them so you don't need to use a USB and wirelessly connect to the their app that's basically betaflight

This is my go-to stack. It's reliable, hardy and space saving. I've run it on heavier 5in quads too, just upped the cap to a 50v to help with any spikes that might happen on high throttle. But for my 3 and 4in this is what I reach for a new build.

I put this in my geprc baby croc 5" and paired with some 2105.5 2650kv hglrc specters and the thing rips. Didn't expect to get 100mph with a 1500mah 4s either..

That was a big unfortunate setback especially when I was building a quad for a client of mine, & right when they received the quad it was great UNTIL, they turned it on, & attempted to go into beta flight.So, I got it replaced. Now all is well, still though it made my life a whole lot harder, & also upset a good client of mine.

This controller is great

Great stack with bluetooth features. Makes it easy to change settings without dragging a computer along.

Flight controller had no gyro out of the box, tried flashing it , same I will no longer be ordering fov parts from here, that's wrong, speedybee knows about this, and yet will not replace it wrong wrong, not happy Amazon.

I've heard so many good things about this so I gave it a try. For some odd reason the fc would not power at all via the ESC harness - only unless I plugged it in via USB. I repair drones/flight controllers as a side gig and have never had this happen. Hopefully the replacement will work ok.EDIT: Replacement worked, but was super fiddly and would either not power the fc properly or spin certain motors. I found it was due to the wiring harness. I don't know what's wrong with it, but it took a lot of unplugging and replugging the harness to get everything to work finally. It seems secure but I'm a little worried that one crash will cause problems again.