Arduino Stack Exchange
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Questions tagged [atmega328]

The ATMega328 is the chip that is the heart of the Arduino Uno. It is popular also as a chip to use to create your own board. Since it is available in the through hole version, it can be placed on a breadboard easily for circuits.

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I got a missignatured ATmega328-PU. How can I fix that?

Sometime in the past, I was burning bootloaders on a fresh batch of four ATmega328-PU using the Arduino IDE (notice there's no P after 328 - it's the slightly cheaper non-picopower version of the MCU, not to be confused with the ATmega328P-PU with a…
Ricardo
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What are the implications of running an ATmega328P at 8 MHz and 3.3 V with the Arduino system?

I'm working on a custom arduino that will run at 3.3 V with no regulators or USB chips (for power consumption). I've heard that overclocking the chip at 16 MHz/3.3 V is generally fine, but I'd like to stay within spec anyway. First: to run at 8…
Vulcan
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Powering Atmega328p from 4.5V

I want to use Atmega328p controller to handle some very simple signals. I'm using the chip and not the whole arduino board because it is a lot cheaper. The problem is that chip itself doesn't have voltage regulator so I need to think of a…
Mirakul
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ATMEGA328P-U vs ATMEGA328-PU

On my Arduino UNO the chip part number is ATMEGA328P-U, i recently bought a ATMEGA328-PU to make a standalone Arduino. realized the part number differences after receiving the package... I noticed that some arduino UNOs have the chip with part…
ElectronSurf
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Why were Atmel MCUs used for Arduino?

Atmel microcontrollers are not cheap compared to STM and Microchip. Why did Arduino select Atmel MCUs such as atmega328 and atmega2560 on their board out of so many alternatives?
user768421
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Is there a way to disable modules like ADC without a sleep mode?

I'm working on a binary watch project. I want my circuit to live off of batteries for as long as possible, so I want to decrease the power consumption of my chip. I'm using a barebones ATmega328P-PU with two 74HC595 shift registers. The ideal…
thallia
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Can I remove soldered atmega328P from arduino board, using hot air gun, without damaging it?

I need to remove atmega328P from arduino board and the best tool what comes up to my mind is a hot air gun. What is the maximum temperature that atmega328P can withstand?
Kirill
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WORDS in ATmega328 datasheet note

I came across something strange while reading the datasheet for the microcontroller in the Arduino Uno board. It is the (8) note in pg.296-297 of this datasheet: what does WORDS mean in that context?
Nubarke
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Atmega328 and 4Digit 7 Segment ghost blinking!

I hooked up 4 7Seg leds (CC) with NPN transistors on the cathode of each digit. I am using 74HC595 shift register connected in the circuit in a pretty common fashion. The code I am running is the basic scanning code for the 7seg. The problem is that…
spdif
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ATMEGA AVcc pin - low pass filter

I am a newby to the world of electronics and IC chips, and am looking to make an ATMEGA328 based board to monitor 12v batteries. The board will be powered from the batteries being monitored, with a regulated power supply taking 12v input and…
Colin
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Should I use an Arduino or not?

I am building an electronic gadget eventually to sell. I think the Atmega IC is used in the arduino and could this be programmed as easily as the arduino? I'm wondering if I can use the chip and buy just what I need for my circuit, which would be…
Eamonn
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Which Datasheet applies to the ATmega328p?

While researching minimum-voltage requirements of Uno, I came across what appear to be two datasheets for the…
dotancohen
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Arduino vs Old Computers

How does an arduino microprocessor compare to some of the older computers in RAM, and computational speed? Like how does it compare to the Intel 400 or the original IBM PC. I'm interested in both the Atmega328 and the 2560. Just how much…
HSchmale
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Standalone atmega328

I have a transistor tester with 16x2 LCD running a plug-in at328 with an 8Mhz xtal. I would like to use this hardware for another purpose. My first idea was to replace the crystal with a 16Mhz one, write a program on my Uno and swap the AT328. Is…
H.Davies
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Did I Brick my Controllino?

I recently obtained a Controllino Mini to be used in a small industrial project. While checking it out I also wanted to test the built-in RTC capabilities. In doing so I toyed around with the available commands from the supplied library. After…
Schnickster
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