![]() ![]() They don't appear to be labled on the added pins next to AREF, so picking the wrong one on this attempt is 50/50. Read this review to learn more about its specs, features, and compatibility with 3D printing and other applications. Can any harm arise from accidentally swapping the SDA for the SCL? I'm thinking no, as its just a zero to 5 volt square wave on either. The Arduino Mega 2560 is a microcontroller board based on the ATmega2560. Are you looking for a powerful microcontroller board for your DIY projects Check out the Arduino Mega 2560 R3, a versatile and reliable board that can handle a variety of tasks. The board accommodates the ATmega2560 microcontroller, which operates at a frequency of 16 MHz. 0 pinout: added SDA and SCL pins that are near to the AREF pin Stronger RESET circuit. It has 54 digital input/output pins (of which 14 can be used as PWM outputs), 16 analog inputs, 4 UARTs (hardware serial ports), a 16 MHz crystal oscillator, a USB connection, a power jack, an ICSP header, and a reset button. The Mega is 100 compatible with Arduino IDE and most of the shields are designed for the Arduino mega2560 R3RoHS Compliant The chip is Atmega2560-16au and Atmega16u2, the same as the official version. It all works so slick and easy like everything else with the Duemilanove, just not with the Mega 2560 R3.įor fun, I am going to try the other two SDA and SCL pins. Description Product Reference Manual SKU: A000067 Arduino Mega 2560 is an exemplary development board dedicated for building extensive applications as compared to other maker boards by Arduino. The Arduino Mega 2560 is a microcontroller board based on the ATmega2560 (datasheet). I checked the output on the Mega's I2C pins with an oscilloscope, and there is certainly a 0 to 5v signal coming out of both SCL and SDA on the Mega. I've tried a variety of values of pull up resistors, and also no pull ups, and still get no I2C function on the Mega. I have another Mega on order, and perhaps it will be the same, or it might work. ![]() When I run any of 3 I2C scanners on my Mega, nothing shows up for the I2C devices. ![]() I now know that the devices, a compass and lcd work perfectly with my Duemilanove. I've been struggling with an otherwise excellent Mega 2560 R3, that for some reason doesn't communicate with any I2C device. ![]()
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