How to use ATmega Microcontroller from Arduino Board on Another Circuit

             Using Arduino boards for electronic circuits are easier to implement, but is very much costlier. Also any damage to the board will result in high economic loss. To avoid this, after uploading the programme, we will seperate the ATmega microcontroller from the Arduino board and then will put on the circuit. While putting the ATmega microcontroller programmed using arduino on another circuit, some facts have to be noted.


1. A Crystal Oscillator of 16 MHz should be connected across the XTAL1 and XTAL2 of the microcontroller.

2. Constant 5V power supply from 7805 Regulator IC.

Step 1. Upload the below given program to blink an LED to the microcontroller using Arduino Board.

int led = 13;

void setup() {              
    pinMode(led, OUTPUT);  
}

void loop() {
    digitalWrite(led, HIGH);   // turn the LED on (HIGH is the voltage level)
    delay(1000);                     // wait for a second
    digitalWrite(led, LOW);    // turn the LED off by making the voltage LOW
    delay(1000);                     // wait for a second
}

Step 2.

Create a circuit as shown in the figure given below. When the power supply is given, LED will start blinking.

ATmega168 / 328 pin mapping can be obtained from the following image.