![]() An official Arduino Uno costs over $20 (although clones can be found on eBay for $10 or less) while a standalone ATmega328P costs about $2. Prototyping is a great use for an Arduino board as it allows for quick and easy iterations of a design, but for completed projects it can often be overkill depending on the features used. The Arduino board makes it easy to interface with the pins on the ATmega328P while adding extra features that don't come with the standalone microcontroller, including a USB serial interface and 16 MHz clock. The ATmega328P is the microcontroller that powers the Arduino Uno development board. Programming an ATmega328P with a blinking LED program. ![]() Preparing the Arduino Uno to work as an in-system programmer.Setting up the Arduino IDE to program a standalone ATmega328P microcontroller.An Arduino can be used to flash a standalone ATmega328P microcontroller without the Arduino bootloader.
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