Why do microcontrollers hang?

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Why do microcontrollers hang?

Microcontroller stops working due to some transient on the power line or some I/O lines. Connected relay operations, EMI/EMC or signal noise can introduce power lines transients. If these pins are coupled with some kind of noisy signal, it can cause the microcontroller into bootload mode and lead to the MCU hanging.

What is the relationship among Arduino ATmega328 and AVR?

In short an ATmega328 is a microcontroller chip found on Arduino Uno boards. ATmega328 microcontrollers are from the 8-bit AVR microcontroller family.

Can I use the Arduino software with other AVR boards?

The Arduino ISP programmer can be also used to load sketches on the AVR-based Arduino boards or on other AVR microcontrollers supported by the Arduino software. Uploading a sketch using the standard procedure needs the presence of the bootloader.

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How do I program a microcontroller with Arduino?

Burning the Bootloader

  1. Upload the ArduinoISP sketch onto your Arduino board.
  2. Wire up the Arduino board and microcontroller as shown in the diagram to the right.
  3. Select “Arduino Duemilanove or Nano w/ ATmega328” from the Tools > Board menu.
  4. Select “Arduino as ISP” from Tools > Programmer.
  5. Run Tools > Burn Bootloader.

Why does my ATmega328 keep restarting when reading analog inputs?

This clearly shows that atmega328 you are using requires an internal reference to 1.1v when reading off the analog inputs. It is probably restarting because when using analogReference(DEFAULT);the atmega328 doesn’t know how to properly decode the signal and it crashes out.

How does the voltage of a pin in a microcontroller work?

The voltage you reference the pin at doesn’t change what the value coming in is. It simply tells the micro controller how to read the value and reference that value. There are different dependencies across the different boards that you have to work with and anything to do with analog always has the potential to be finicky.

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What is the default analog voltage of Arduino?

DEFAULT: the default analog reference of 5 volts (on 5V Arduino boards) or 3.3 volts (on 3.3V Arduino boards) INTERNAL: an built-in reference, equal to 1.1 volts on the ATmega168 or ATmega328 and 2.56 volts on the ATmega8 (not available on the Arduino Mega)