One fully completed and tested 32 bits ARM flight controller come with all interface cables with connector.
This new released UavxArm32F4 V4 is probably the smallest full-house F4 board utilize SPI
out there and has been flown on regular 600 scale hexacopters down to nano quads.
For brushed motor with 1/2S setup, a optional added on daughter board is available and
support for up to 6 brushed motors.
* Dimension 30mm X 30mm
* Weight 5.5 Grams
* STM32F405RG CPU
* MPU6500 IMU
* MS5611 Barometer
* HMC5983 Magnetometer
* 32Mb FLASH Memory for logs.
More Project technical detail are available here