How arduino shows output on Serial Monitor? Answered
Because inorder to display output of any microcontroller in Computer we have to Use MAX232 interface. Microcontroller uses TTL(Transistor Transistor Logic) and Computer Uses RS logic. Max 232 converts TTL into RS Logic so that the output of microcontroller will be displayed in computer. But there is no MAX232 used in arduino board. Then how Arduino is displaying output in serial monitor.