How many propellers can single Ardupilot Mega 2.5 + control ?

Just wondering, how many propellers can a single Ardupilot Mega 2.5 + can control at a single time, wirelessly ? 

DYI Drones sells up to a Hexcopter. 

Looking at the datasheet of ATmega2560,"It has 54 digital input/output pins (of which 15 can be used as PWM outputs" ? So can it support up to 15 PWM Motors at once?  

I am not building a UAV. Just trying to build a test experiment for propellers. 

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Hi, there seems to be 10 supported PWM output channels for APM2. Actaully on the board and in some documentation there seems to be 11, but number 9 (8 where zero based) has not PWM output implemented.

APM2 cannot control propellers wirelessly. Well not without some extra hardware.

Regards

Soren

Wirelessly i meant from computer to APM2.5 . APM 2.5 is embedded on the vehicle. 

But datasheet says 15 can be used as PWM outputs ? Why was it saying that?

Hi, which data sheet?

Maybe I can't follow you quite. You ask how many propellers/motors can be controlled, and then explain something about data from a computer to APM.

The number of input channels and the number of PWM output channels have little to do with each other. You can fly a 12 motor copter with a 4 channel RC no problem. In APM, you can override the RC input system with some MAVLink messages from a computer. That uses no PWM hardware. The real RC input uses no PWM hardware either, and only one timer on the main ATMEGA2560.

The ATMEGA2560 might have 15 PWM channels yes. It was just decided for ArduPilot that not all 15 were necessary and some timers were needed for other things than PWM generation. So, not all 15 have been connected to PWM out pins.

Regards

Soren

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