You can't set an analog pin to a specific voltage PWM just adjusts the duty cycle of a square wave alternating between 0v and +5v so that the average over time appears between 0 and +5v. By default they measure from ground to 5 volts, though is it possible to change the upper end of their range using the AREF pin and analogReference() function.Īll analog pins do analog output using PWM. The Mega has 16 analog inputs, each of which provide 10 bits of resolution (i.e. Note that these pins are not in the same location as the TWI/I2C pins on the Duemilanove or Diecimila. Support I2C aka IIC aka TWI communication using the Wire library. When the pin is HIGH value, the LED is on, when the pin is LOW, it's off. There is a built-in LED connected to digital pin 13. The SPI pins are also broken out on the ICSP header, which is physically compatible with the Uno, Duemilanove and Diecimila. These pins support SPI communication using the SPI library. PWM: 2 to 13 and 44 to 46, provide 8-bit PWM output with the analogWrite() function.See the attachInterrupt() function for details. These pins can be configured to trigger an interrupt on a low value, a rising or falling edge, or a change in value. External Interrupts: 2 (interrupt 0), 3 (interrupt 1), 18 (interrupt 5), 19 (interrupt 4), 20 (interrupt 3), and 21 (interrupt 2).
ARDUINO MEGA 2560 PINOUT SERIAL
Pins 0 and 1 are also connected to the corresponding pins of the USB-to-TTL Serial chip.
Used to receive (RX) and transmit (TX) TTL serial data. The Mega Sensor Shield HERE makes it easier. It's difficult to manage connections and cabling to so many Inputs and Outputs. See ARDUINO PIN CURRENT LIMITATIONS: Be nice to your Arduino! Analog pins and a subset of the digital pins do Pulse Width Modulation (PWM) using analogWrite().Įach pin operates at 0 to 5 volts, can provide or receive an absolute maximum of 40 mA (20mA recommended), and has an internal pull-up resistor (disconnected by default) of 20-50 kOhms. The analog pins will sample voltage levels and report a digital value using analogRead().
Maximum current draw is 50 mA.Įach of the 54 digital pins and 16 analog pins on the Mega can be used as an input or output, using pinMode(), digitalWrite(), and digitalRead() functions. A 3.3 volt supply generated by the on-board regulator. Supplying voltage via the 5V or 3.3V pins bypasses the regulator, and can damage your board. The board can be supplied with power either from the DC power jack (7 - 12V), the USB connector (5V), or the VIN pin of the board (7-12V). This pin outputs a regulated 5V from the regulator on the board. You can supply voltage through this pin, or, if supplying voltage via the power jack, access it through this pin. The input voltage to the Arduino board when it's using an external power source (as opposed to 5 volts from the USB connection or other regulated power source).
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