Comment by Dave C on May 12, 2012 at 7:54am

@Ellison Someone has :) http://www.multircshop.com/site/index.php?route=information/informa...

 

Comment by Nick on May 12, 2012 at 7:58am

I cant wait, Hobbyking I'm sure will keep this a reasonable price range which makes it even better.

Comment by Ellison Chan on May 12, 2012 at 8:03am

Thanks Dave.  That KK plus platform, sounds interesting.  Too bad it take some much hacking to get working.

Also it answers the question Simon has about that that 5th input was:

 

Developer Comment by R_Lefebvre on May 12, 2012 at 8:36am

@John, really? I thought the 2560 had more power than a 328, 168, etc?  What does it have more of then? Just more IO and more RAM?

Comment by Ed Kirk on May 12, 2012 at 9:47am

It would be really awesome if it came in purple.

Ed

Developer Comment by John Arne Birkeland on May 12, 2012 at 12:57pm

@Lefebvre: Yes, that pretty much sums it up. The only thing that might make a difference is that the 1280/2560 has more hardware PWM channels, making it easier to drive servos/motors.

Developer Comment by R_Lefebvre on May 12, 2012 at 1:24pm

Which we then do through a 328 anyway... ;)

Comment by Vernon Barry on May 12, 2012 at 2:46pm

R_Lefebvre, No you got it backwards. The 328 on APM sums the PPM inputs into a format the Mega 2560 take tak ein in on one channel instead of reading 8channels with 8 pins thus limiting free resources on the 2560. Then, we smartly use the hardware timers within the 2560 which make PWM functions out for 8 or more channels of outputs to drive servos or speed controls. To say the 328 and 2560 have the same "power" is some serious over simplification. Bascially, they allow us to use the same IDE and more or less the same code base, but when we get into hardware performance, it's apples and oranges. See the chart below about PWM outs. 6 PWM outs on a 328P isn't going to cut it for an Octo.

Arduino board models

	Processor	Frequency	Voltage	Flash kB	EEPROM kB	SRAM kB	Digital I/O pins	...with PWM	Analog input pins
	ATmega1280	16 MHz	5 V	128	4	8	54	14	16
	ATmega2560	16 MHz	5 V	256	4	8	54	14	16
	ATmega328P	16 MHz	5 V	32	1	2	14	6	6

Developer Comment by John Arne Birkeland on May 13, 2012 at 8:21am

But the processor core and hence math performance is exactly the same for a 328/2560, so we run into the same computational limitations when trying to make sense of the sensor data and calculate an AHRS solution. The performance gain from extra PWM hardware is marginal in this regard.

Comment by Jonas Beseler on May 16, 2012 at 11:43pm

Char of flitetest mentioned it in his Director Video as a KK2 Board

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