Arduino Mega Pinout | Arduino Mega 2560 Layout, Specifications (2024)

FAQs

What are the pinouts of ATmega2560 microcontroller? ›

Arduino Mega Pinout(Detailed Board Layout) Arduino Mega 2560 has 54 digital input/output pins, where 16 pins are analog inputs, 14 are PWM pins, and 6 are hardware serial ports (UARTs). It has a crystal oscillator-16 MHz, a power jack, an ICSP header, a USB-B port, and a RESET button.

Arduino 2560 has 12 pins supporting PWM. They are from 2 to 13 included. the PWM default frequency is 490 Hz for all pins, with the exception of pin 13 and 4, whose frequency is 980 Hz (I checked with an oscilloscope).

Each of the 54 digital pins on the Mega can be used as an input or output, using pinMode(), digitalWrite(), and digitalRead() functions. They operate at 5 volts. Each pin can provide or receive a maximum of 40 mA and has an internal pull-up resistor (disconnected by default) of 20- 50 kOhms.

The Mega 2560 can be powered via the USB connection or with an external power supply. The power source is selected automatically. External (non-USB) power can come either from an AC-to-DC adapter (wall-wart) or battery. The adapter can be connected by plugging a 2.1mm center-positive plug into the board's power jack.

Pins are numbered (counted) from the bottom of the row to the top, then picked up at the bottom of the next row. For male headers, start on the left and for female headers, start on the right. For headers attached to ribbon cables, the pins are numbered linearly across the cable.

The Arduino Mega has three additional serial ports: Serial1 on pins 19 (RX) and 18 (TX), Serial2 on pins 17 (RX) and 16 (TX), Serial3 on pins 15 (RX) and 14 (TX).

If Pin 4 is described as “Speed Control” or “PWM” or the like, you can be sure that the fan header supports PWM. Unfortunately, the description of Pin 2 is not always a clear indication as some manufacturers use terms such as “Fan PWR” or “Power” for both types of fan headers.

Every mainstream motherboard that leaves the factory today is equipped with at least one 4-pin PWM header. High-end motherboards offer 4-6 or even more of these 4-pin fan/pump connectors, and the PWM system is a very effective and smart way to control the fans.

On an Arduino Uno, PWM output is possible on digital I/O pins 3, 5, 6, 9, 10 and 11. On these pins the analogWrite function is used to set the duty cycle of a PWM pulse train that operates at approximately 500 Hz2. Thus, with a frequency fc = 500Hz, the period is τc = 1/fc ∼ 2ms.

NOTE: Digital pin 13 is harder to use as a digital input than the other digital pins because it has an LED and resistor attached to it that's soldered to the board on most boards.

What does each pin on Arduino do? ›

It is used to Resets the microcontroller. Analog Pins: The pins A0 to A5 are used as an analog input and it is in the range of 0-5V. Digital Pins: The pins 0 to 13 are used as a digital input or output for the Arduino board. Serial Pins: These pins are also known as a UART pin.

To use an analog pin as a digital pin, you simply have to set the mode for the pin, as you would do for digital pins in the setup() function of your Arduino program. Then, you can use the digitalWrite() and digitalRead() functions and it will work perfectly.

The 12v supply will be OK for the Arduino (there is no such thing as too many amps - it only uses what it needs). You need a separate circuit from the same 12v supply to provide 4.8v to 6v to power the servo.

The most important thing to look for is what type of DC connector your device will need. Various DC output connectors include: 2.1mm inner diameter x 5.5mm outer diameter female, 2.5mm inner diameter x 5.5mm outer diameter female, 3.5mm male, 4-pin, 5-pin, and 6-pin DIN male; and also stripped and tinned wires.

With a 12V source, yes, current should limited to avoid overheating/shutting down the regulator. With a 9V or 7.5V source, one can do quite a bit. For example, four MAX7219s driving 8x8 LED matrixes as I did here.

In electronics, a pinout (sometimes written "pin-out") is a cross-reference between the contacts, or pins, of an electrical connector or electronic component, and their functions. "Pinout" now supersedes the term "basing diagram" that was the standard terminology used by the manufacturers of vacuum tubes and the RMA.

Phone pinouts come in two varieties, straight and reverse. Straight cables are used to send data, like a fax machine, while reverse cables are used for voice, like a telephone. On a straight cable, the wires will connect to the same metal pins on either side of the cable.

Configuration pins are used to load the design data into SRAM-based FPGAs. The bitstream defines the functional operation of the internal resources, interconnections and I/O for the FPGA. The configuration mode selected to program the FPGA is an important design factor to consider when assigning pins.

VIN is the completely unaltered input power before the regulator (it will be useless if regulated 5v is supplied directly). Outputting power is what the 5v pin is intended to be used for, not as a power input.

Pins 0 and 1 are used by the USB port to upload your sketch. After the sketch is loaded, you can use them as digital pin. Just call them 0 and 1. You can power your Arduino from USB if you don't draw more than what your computer can supply (around 500ma).

Does it matter what pin you use on an Arduino? ›

If you have any analog sensors connected to your Arduino, then you should always use one of the Arduino ground pins to connect the ground side of the analog sensor(s), and different ground pins to connect the ground side of any output devices and (if applicable) power.

A 3-pin case fan can easily be connected to a 4-pin connector on the motherboard.

3 pin fans are controllable with increasing or decreasing voltage. So plugging a 3 pin into a 4 pin pwm software controlled hub header will only run the fan at full speed.

Due to the way PWM fans function, they're generally more efficient than DC fans and use less power. Consider the duty cycles of PWM fans. When a fan is on a 40% duty cycle, it's only using electrical power 40% of the time. In comparison, the DC fans, if anything, will use a slightly lower voltage.

The 4 pin is only necessary if you are doing extreme overclocking, such as LN2. Otherwise the 8 pin will provide all the power you will need.

The most common control method is the use of Pulse Width Modulation (PWM). The pulse width of the AC signal at the power supply's input is adjusted to increase or reduce the electrical energy, which in turn translates to a change to the voltage at the output of the power supply.

PWM, or Pulse Width Modulation is a technique for getting an analog output using digital signals. A digital signal, in general, can have either of the two values: HIGH/ON or LOW/OFF.

The pin number is its only parameter. The Arduino does not have a digital-to-analog converter (DAC) built-in, but it can do pulse-width modulation (PWM) a digital signal used to achieve some of an analog output's functions. The function analogWrite(pin, value) is used to output a PWM signal.

However there's a note: PWM timer peripheral is duplicated on two pins (A5/D2) and (A4/D3) for 7 total independent PWM outputs. For example: PWM may be used on A5 while D2 is used as a GPIO, or D2 as a PWM while A5 is used as an analog input.

Analog pin is for input.. These pwm pins are output pins.. Pwm pins are not actually analog.. basesd on witdh of the pulse..it determines the analog valu..

Can a pin be both input and output? ›

Each I/O pin is both an input and an output and can be used as both at the same time. Input pins are used to read the outside world and output pins are used to control the outside world.

The maximum current draw of the Arduino is 200mA.

As mentioned, the maximum output current an Arduino's digital pin can supply is 40mA (or 20mA continuous current).

There are three main types of Arduino pins: digital pins, analog pins and power pins.

Pins (3.3, 5, GND, Vin)

Most of the components used with Arduino board works fine with 3.3 volt and 5 volt. GND (8)(Ground) − There are several GND pins on the Arduino, any of which can be used to ground your circuit.

The 14 digital input/output pins can be used as input or output pins by using pinMode(), digitalRead() and digitalWrite() functions in arduino programming. Each pin operate at 5V and can provide or receive a maximum of 40mA current, and has an internal pull-up resistor of 20-50 KOhms which are disconnected by default.

The board can operate on an external supply of 6 to 20 volts. If supplied with less than 7V, however, the 5V pin may supply less than five volts and the board may become unstable. If using more than 12V, the voltage regulator may overheat and damage the board. The recommended range is 7 to 12 volts.

digitalWrite()

If the pin has been configured as an OUTPUT with pinMode() , its voltage will be set to the corresponding value: 5V (or 3.3V on 3.3V boards) for HIGH , 0V (ground) for LOW .

Arduino Mega 2560 does not have any DAC peripheral. You will need some additional hardware to implement it.

Yes, it is absolutely safe to charge a device with a charger that has more current capacity than needed.

Can I use both 3.3 V and 5V Arduino? ›

Yes, you can power something from the 5V pin and something else from the 3.3V pin.

3.7V LiPo batteries are useful for low-power Arduino IoT applications. The 600mAh battery shown here can power a standard Arduino Uno board for a few days under moderate processing conditions, and up to several months with the right sleep routines and modifications (power down, no LED, etc.)!

It's inner diameter is standard 2.1mm while outer diameter of 5.5mm.

Common size configurations for jacks and plugs are 3.5mm, 2.5mm, and 6.35mm. The 3.5mm jack, in particular, is practically universal when it comes to headphones and audio gear and thus is considered the standard headphone jack size.

Many non-proprietary co-axial power plugs are 5.5 mm (0.22 in) in outside diameter (OD) and 9.5 mm (0.37 in) in length. Two pin sizes are common in the jacks for this size plug body, 2.1 mm (0.083 in) and 2.5 mm (0.098 in), and the plugs should match.

The board can operate on an external supply of 6 to 20 volts. If supplied with less than 7V, however, the 5V pin may supply less than five volts and the board may become unstable. If using more than 12V, the voltage regulator may overheat and damage the board.

Connect the emitter of all the transistors to the Ground of Arduino. Connect the Ground of 12V power supply to the Ground of Arduino. Connect the positive terminal of 12V power supply to the 12V pin of RGB LED strip.

Can you use a 12V 2a charger on a 12V 1.5 a device or 12v 1a device ? You can use a 12V supply with a higher current rating, but not a lower one. The device will only draw the current it wants, but the supply has to able to put out the maximum current the device wants.

Atmega16 is a 40 pin microcontroller based on enhanced RISC (Reduced Instruction Set Computing) architecture with 131 powerful instructions. It has a 16 KB programmable flash memory, static RAM of 1 KB and EEPROM of 512 Bytes. The endurance cycle of flash memory and EEPROM is 10,000 and 100,000, respectively.

Atmega328 has 28 pins in total. It has 3 Ports in total which are named as Port B, Port C and Port D.

What is the pin count for ATmega? ›

ATMEGA328P is a 28 pin chip as shown in pin diagram above. Many pins of the chip here have more than one function. We will describe functions of each pin in below table.

Difference Between Arduino and ATmega2560 AVR

It differs from the ATmega328 in that it is only available in a surface mount package, so can't be inserted into and removed from a socket on the Arduino. It also has more memory, more pins and more built-in hardware peripherals than the ATmega328.

The ATmega16A is a functionally identical, drop-in replacement for the ATmega16. All devices are subject to the same qualification process and same set of production tests, but as the manufacturing process is not the same some electrical characteristics differ. ATmega16 and ATmega16A have separate datasheets.

The Atmega328 has 28 pins. It has 14 digital I/O pins, of which 6 can be used as PWM outputs and 6 analog input pins. These I/O pins account for 20 of the pins. The pinout for the Atmega328 is shown below.

The Atmega8 microcontroller consists of 28 pins where pins 9,10,14,15,16,17,18,19 are used for port B, Pins 23,24,25,26,27,28 and 1 are used for port C and pins 2,3,4,5,6,11,12 are used for port D.

DIFFERENCE BETWEEN ATMEGA328/328P

Atmega328P just consumes lower power than Atmega328. Look up the numbers in the datasheet. This means that the 328P is manufactured in a finer process than the 328. Ex: 328 could be a 90nm process and 328P could be a 60nm process.

The main difference is the bit before the - . That is, the 328 vs the 328P. The "P" there denotes "Picopower" which allows the chip to run at very low power consumptions. Basically the P version is a more modern version of the non-P chip.

BJustification: The p letter in ATmega328p stands for pico‐power5.

Analog Pins: The pins A0 to A5 are used as an analog input and it is in the range of 0-5V. Digital Pins: The pins 0 to 13 are used as a digital input or output for the Arduino board. Serial Pins: These pins are also known as a UART pin.

The Arduino Mega 2560 is a microcontroller board based on the ATmega2560 (datasheet). 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.

What is the maximum input output pins of ATmega328? ›