How to assemble FlexRC Core DIY Kit

FlexRC Core is an incredible piece of electronics which uses best components available on the market and offers light all in one solution for you racing drone and easiest building experience.

It includes:
– All in One F3 Flight Controller with integrated 200mW VTX, OSD and blackbox
– BusyBee2 4 in 1 20A ESC
– Pololu 5V, 1A
– SMA Antenna pigtail
– Set of mounting hardware

Install Pololu on top of the Flight Controller

After everything is soldered, it is recommended to cut of excess of pins.

The result will look like this:

** Please note that Pololu comes with 5pin connector and you will need to pull out two unused pins

Prepare SMA antenna pigtail

Remove enough insulation to have antenna wire exposed and shield exposed, then melt a lot of soldered on the shield and antenna wire.

Solder antenna to the bottom side of FC

Make sure that antenna cable is facing LEFT and you solder entire shield to the pad, so it will be strong.

It is also recommended to use hot glue to reinforce the connection.

Install signal wires and power wires

First remove BLACK and RED wires from ESC harness and then reuse them to connect power from ESC to FC and connect signal wires like on the picture:

Notice that it looks like we are routing ESC wires to the wrong locations on the Sirin board. Trust the picture – this will simplify how motors are soldered to the 4-in-1 board later. If you have already decided to orient the 4-in-1 board in a certain specific manner, feel free to connect the ESC wires to the “appropriate” connections on the Sirin board.