|Item model number||UM-H4JR-VSOH|
|Item Weight||1.6 ounces|
|Product Dimensions||4.4 x 2.3 x 0.4 inches|
Arduino MEGA ADK R3 for Android
|Price:||$59.91 & FREE Shipping. Details|
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- The Arduino ADK is a microcontroller board based on the ATmega2560
- It has a USB host interface to connect with Android based phones, based on the MAX3421e IC
- For information on using the board with the Android OS, see Google's ADK documentation.
- Android Development Board
- R3 board
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The ADK is based on the Mega 2560.
Similar to the Mega 2560 and Uno, it features an Atmega8U2 programmed as a USB-to-serial converter.
For information on using the board with the Android OS, see Google's ADK documentation.
New for R3:
1.0 pinout: added SDA and SCL pins that are near to the AREF pin and two other new pins placed near to the RESET pin, the IOREF that allow the shields to adapt to the voltage provided from the board. In future, shields will be compatible both with the board that use the AVR, which operate with 5V and with the Arduino Due that operate with 3.3V. The second one is a not connected pin, that is reserved for future purposes.
Stronger RESET circuit.
Top Customer Reviews
Unfortunately, the MCU has a ceramic resonator clocking it, not an accurate crystal. This is very poor design for both this ADK and the basic Mega 2560 model. Arduino has the only AVR development boards I've seen that do not have crystals clocking the MCU. This is a terrible way to "cheap out" which makes accurately measuring wall-clock-time durations impossible. A crystal costs less than 50 cents in quantity ! Even stranger is that the 2 USB interface processors do have crystals.
Also, PB6 is not wired to connector JP6 as the schematic indicates. PB6 is wired to where the schematic says PB7 should be. PB7 is tied to the user LED and nowhere else. The polarity needed to control the user LED is backwards from what is expected because Arduino used a spare op-amp to buffer the drive signal. The use of a buffer is pointless because pin PB7 can directly drive such a low power LED and the PB7 signal goes nowhere else on the board.
As with all the Arduino's "extended" size boards, all the connectors are not positioned on 0.1 inch centers relative to each other. This makes creating a hand-wired proto board impossible to plug into all the connectors at once, which is a very desirable thing to do. I can only come to the conclusion that Arduino has done this on purpose to prevent the casual experimenter from making a properly fitting plugin board. There is no good reason why Arduino created this obviously flawed board layout and continues to create new boards with this moronic connector positioning.
Anyway, it is still a good Arduino device, but unless you're using a Nexus phone I wouldn't bother. If you just want an Arduino get the standard MEGA or the original.