A new super small SPF3 board now in “Femto” size with a total weight of 2.2g: http://www.banggood.com/Emax-STM32F303-F3-Femto-Flight-Controller-with-Integrated-BECBuzzer-PadsVBatPDB-p-1101875.html
If the final weight is not impressive (you can find for example the FrFR3 at 2.6g), this kind of FC could be ideal for super compact micro brushless machine.
Brand name: Emax
Item name: Femto Micro F3 Flight Controller
2-6S LiPo battery
Integrated 5V/3A BEC
2.0 mm pin headers
80A Current tolerance (PDB)
Integrated Battery monitoring
Dedicated PPM receiver input
BLHeli Passthrough ready(connect BLheli suite)
Supports direct connection of 3.3v Spektrum Satellite receivers
Telemetry support (frsky telemetry, smartport, and HoTT telemetry)
MPU9250 accelerometer/gyro/compass (connected via SPI)
Dedicated Sbus and serial RX with 5v ,Spektrum 1024/2048, SBUS, XBUS, SumD and SumH RX with built-in inverter
Dedicated output for programmable LEDs – great for orientation, racing and night flying. (Currently mutually exclusive with the Transponder)
Use all the features all the time; e.g. Connect your USB + SmartPort + SBus + LED Strip + Battery Monitoring + 4 motors – all at the same time!
Use for Spektrum Satellite RX, Spektrum 1024/2048, SBUS, XBUS, SumD and SumH RX, etc.
?UART2/PPM – Serial RX or PPM RX + Telemetry
Use RX2 as PPM receiver. Use TX2 as telemetry output when using PPM.
The size is tiny. itÿs not just an FC. Itÿs also a PDB
This FC is designed for the micro femtoquad. Itÿs 20mm by 20mm and has no mounting holes.
Thus youÿll have to mount it using double sided tape.
Which honestly is a good thing because thatÿs an effective method of soft mounting a FC anyway.
The FC even has an LC filtered 5v regulator for your camera and VTx which is outstanding given itÿs size.
Itÿs also got LED and buzzer pads, VBat, and is capable of using 2-4s LiPo batteries.
This FC should be perfect for those sub 150mm sized micro quads (which donÿt produce much noise to begin with).
1 x Emax Femto Micro F3 Flight Controller