![]() The voltage provided by the power jack can be accessed through this pin. The range of supplied input voltage to the board ranges from 7volts to 20volts. When we compare with other types of Arduino boards, these boards are physically superior. These boards offer flexible work memory space is the more & processing power that permits to work with different types of sensors without delay. By using this board, the Arduino mega projected can be designed. All analog pins of this board can be used as digital I/O pins. Every pin of this board comes by a particular function which is allied with it. The pin configuration of this Arduino mega 2560 board is shown below. The USB host chip used in this is MAX3421E. ![]() The electrically erasable programmable read-only memory (EEPROM) is 4 KB.The static random access memory (SRAM) is 8 KB.Flash Memory like 256 KB where 8 KB of flash memory is used with the help of bootloader.DC Current for each input/output pin is 40 mA.The digital input/output pins are 54 where 15 of these pins will supply PWM o/p.The input voltage will range from 6volts to 20volts.The recommended Input Voltage will range from 7volts to 12volts.The operating voltage of this microcontroller is 5volts.The specifications of Arduino Mega include the following. ![]() These boards work with every existing shield although can adjust to latest shields which utilize these extra pins. Another pin is not associated & it is kept for upcoming purposes. One pin is the IOREF that permit the shields to adjust the voltage offered from the Arduino board. Additionally, there are two latest pins located near the RST pin. The SCL & SDA pins of Mega 2560 R3 board connects to beside the AREF pin. This board can be protected from the unexpected electrical discharge by placing a base plate. So, the power supply of this board can be done by connecting it to a PC using a USB cable, or battery or an AC-DC adapter. This board mainly includes everything which is essential for supporting the microcontroller. It includes digital input/output pins-54, where 16 pins are analog inputs, 14 are used like PWM outputs hardware serial ports ( UARTs) – 4, a crystal oscillator-16 MHz, an ICSP header, a power jack, a USB connection, as well as an RST button. In this case, 3 corresponds in binary to 011.The microcontroller board like “Arduino Mega” depends on the ATmega2560 microcontroller. Int myPrescaler = 3 // this could be a number in. TCCR2B &= ~myEraser // this operation (AND plus NOT), set the three bits in TCCR2B to 0ħ) now that CS02, CS01, CS00 are clear, we write on them a new value: ![]() ![]() Int myEraser = 7 // this is 111 in binary and is used as an eraser Those bits in fact represent an integer number (from 0 to 7) called 'prescaler', that Arduino uses to generate the frequency for PWM.Ħ) First of all, we have to clear these three bits, i.e they must be all set to 0: The first three bits (from right to left!) are called CS02, CS01, CS00, and they are the bits we have to change. So, if we want to change the PWM frequency of pins 10 and 9, we will have to act on TCCR2B. This is the list of timers in Arduino Mega 2560:Īs you can see, a given timer controls more than one pin (every change about a timer will affect all pins depending on it!).Ĥ) You can access a timer simply changing in your code (tipically in the setup()), the value of variable TCCRnB, where 'n' is the number of register. Whose frequency is 980 Hz (I checked with an oscilloscope).ģ) In order to change frequency on pin 'A', we have to change some value in the timer They are from 2 to 13 included.Ģ) the PWM default frequency is 490 Hz for all pins, with the exception of pin 13 and 4, Code: 1) Arduino 2560 has 12 pins supporting PWM. ![]()
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