This is the new APM 2.8 autopilot module. The sensors are exactly the same as with APM2.6, however this version does not have an onboard compass, which makes this version ideal for use with multicopters and rovers.
The APM 2.8 is a complete open source autopilot system and the bestselling technology that won the prestigious 2012 Outback Challenge UAV competition. It allows the user to turn any fixed, rotary wing or multirotor vehicle (even cars and boats) into a fully autonomous vehicle; capable of performing programmed GPS missions with waypoints. Available with top or side connectors.
The interface is changed from 1.0mm 6P SM06B GPS to DF13-4P I2C external compass interface, put DF13- 5P GPS interface with external compass interface
The I2C interface has been changed to multifunctional MUX interface, users can configurate the interface like UARTO, UART2, I2C, OSD, default OSD interface
2.8 ADOPTS LP2985-3.3, the voltage reaches 16V,increase the reliability, reduce the voltage problem probability of Bad Gyro health
2.8 uses jumper cap to choose, find the MAG pins on board, pluging in jumper cap is built in compass, taking off jumper cap is external compass
v2.5 just added gigh frequency component of the filter circuit which made of 0.1uF to filter the high frequency interference,the board does not have a large capacity of capacitor use to filter the low frequency component of the ripple,2.8 Added a 47 uf tantalum capacitor, improve APM on-board chip, the stability of the power supply.
Atmel's ATMEGA2560 and ATMEGA32U-2 chips for processing and usb functions respectively.