can anyone help me about this block diagram?
Well it’s old for a start. You shouldnt use an APM flight controller, they are very outdated and no longer supported.
There’s much on there you dont need unless you’ve got some special purpose for them
You do need:
- Battery (prefer just one of correct capacity)
- Good battery charger
- Power module (usually comes with the flight controller)
- Radio control transmitter and receiver
- Frame or vehicle to put it all in
- Telemetry radios - optional
- Flight controller