One of my friends asked me to build a quad for him and I got a chance to work with Motolab Cyclone FC v1.2




All wiring and extra stuff is sold separately, like this JST-SH wire and 2 spare connectors. 

Specs:

• An on-board 600mA switching regulator for direct connection to lipos up to 4S, or up to 6S with power filtering.
  

• USB interface independent of UART channels.
  

• Three hardware UARTs. The UART 2 TxD signal is also pinned out to a connector.
  

• Reverse current protection on lipo and USB inputs for problem-free ESC calibration.
  

• Dedicated serial LED output with lipo voltage and GND.
  

• On-board buzzer driver with 5V and lipo voltage option.
  

• Built-in VBAT monitor with low-pass filter from lipo input.
  

• Built-in RSSI monitor with low-pass filter.
  

• Dedicated SAT receiver interface with 3.3v using JST connector for compatibility with Spektrum/LemonRC cables.
  

• Dedicated PPM and serial receiver interfaces with 5V power using 0.1" headers.
  

• Compatibility with receivers using Spektrum 1024/2048, SBUS, SumD and SumH receivers with built-in inverter.
  

• High-quality gold plated 4-layer printed circuit board.
  

• Connector arrangement for convenient access to serial interfaces, with PWM and other device connections on sturdy through-hole pin headers.
  

Firmware
The FC comes with betaflight 2.9 already pre-flashed, but since 2.9.1 was released recently I flashed it. The process is pretty straightforward, but make sure you shorten boot pads when plugging in (with tweezers or similar) :



Also make sure that your connection settings are properly set in Betaflight Configurator:




Wiring

The first thing I noticed that there are no labels on the board at all. After googling a bit, found a wiring diagram:



Conclusion

+

• NO!!! dedicated 5v pins for each PWM output. Since most of racing ESC don't have a BEC there is no need to have an extra pin for each ESC.
  
• SPI protocol allowing faster gyro updates
  
• Build-in BEC for direct lipo connection
  
• 3 UART ports + USB VCP (virtual com port) allowing utilize UART1 fully.
  

-

• Labels.. 
  
• Having a separate spektrum sat. port is good, but not very necessary here. You should be able to connect it to any UART.
  
• Boot pins. Xracer F3 board has a super easy solution just having a small button compared to pin holes, which will be the way easier if you will be upgrading firmware having FC mounted on a quad already. 
  

UPDATE:
If you're interested in initial betaflight configuration steps, I found those 2 videos extremely helpful:

Reasonably priced board.. Thanks for sharing... only thing i don't particularly like is the motor pins and location... and I wish them print pin labels on the board so we don't always need to look up manual