AT MEGA 328 Arduino pinout Circuit Diagram

Here are diagrams that show the pinout of the micro controller Arduino Atmega and most basic circuit diagram with the crystal. Also a pinning and tqpf ATmega328 with Arduino bootloader code. Many times we lost to the passage of Arduino + breadboard to design on paper and then on the PCB.

AT MEGA 328 Arduino pinout Circuit Diagram

Arduino bootloader

Port B has pins B0 to B5

Port C pins have C0 to C5

Port D has pins D0 to D7

Arduino AT MEGA328 Pinout TQFP

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Protection Circuit for Input Ports Arduino

This is a Protection for Input Ports Arduino Circuit Diagram. During tests or doing some project, we run the risk of accidentally burn Arduino input. A short circuit protection can prevent a lot of problems and is one less worry, especially against accidents. It is simple, you just need a 1k resistor and a zener diode of 5 Volts, which in the case of commercial zener diode, the voltage is closer to 5.1 V and diode is the 5V1.

 Protection for Input Ports Arduino Circuit Diagram

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