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Arduino UNO bootloader Atmega 328P-PU
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$6.35
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This ATmega328P-PU microcontroller comes in a 28-pin DIP package with the Arduino Uno Optiboot bootloader pre-loaded. Drop it into a breadboard or custom PCB...
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This ATmega328P-PU microcontroller comes in a 28-pin DIP package with the Arduino Uno Optiboot bootloader pre-loaded. Drop it into a breadboard or custom PCB and program it directly from the Arduino IDE — no Arduino board required.
To get started, you'll need an external 16 MHz crystal or resonator, a 5 V supply, and a serial connection (e.g. an FTDI adapter).
Key Features
- Pre-loaded Bootloader – Optiboot (Arduino Uno) ready to go
- 28-Pin DIP Package – Breadboard and socket friendly
- 32 KB Flash – Program memory for your sketches
- 23 I/O Lines – Including 6 channels of 10-bit ADC
- Wide Voltage Range – 1.8–5 V operating voltage
- Up to 20 MHz – With external crystal
- In-Circuit Programmable – ISP header support
Specifications
- Chip: ATmega328P-PU
- Architecture: 8-bit AVR
- Package: 28-pin DIP
- Flash Memory: 32 KB
- Operating Temperature: −40 to +85 °C
Ideal For
- Custom embedded projects using Arduino code
- Permanent installations where a full Arduino board is unnecessary
- Breadboard prototyping and learning AVR architecture
Package Contents
- 1× ATmega328P-PU with Arduino Uno bootloader
Jargon buster
Plain-language definitions for the technical terms used above.
- ADC
- An analogue-to-digital converter reads a changing voltage and turns it into a number the microcontroller can use. It matters when connecting analogue sensors such as light, sound, or variable-resistor sensors.
- ATmega328P
- An 8-bit microcontroller chip used on many Arduino Uno-compatible boards. Knowing the controller uses an ATmega328P helps you understand its memory, speed, pin compatibility, and the Arduino sketches it can run.
- AVR
- AVR is a family of 8-bit microcontrollers (made by Microchip, formerly Atmel) used in many classic Arduino-style boards such as the Uno and Nano. They are widely supported but older, which can be a limit for memory- or speed-intensive tasks.
- Bootloader
- Small starter software on a microcontroller that lets new code be uploaded before the main program runs. Knowing how to enter bootloader mode matters when you need to program the board or recover it after a faulty sketch.
- Flash memory
- Flash memory is non-volatile memory that retains stored data even when power is removed, and can be erased and rewritten in blocks. It lets data such as firmware, settings or saved records persist across power cycles.
- IDE
- Short for Integrated Development Environment, a program used to write, run and manage code. It matters because some learners prefer a traditional coding workspace instead of a guided notebook-style lesson.
- ISP
- In electronics, ISP usually means In-System Programming, a way to load firmware onto a microcontroller while it stays on the board (often via an ICSP header), or an Image Signal Processor, hardware that turns raw camera sensor data into usable images and offloads the main CPU. The surrounding context shows which meaning applies.
- microcontroller
- A microcontroller is a small computer on a single chip that runs a stored program and controls connected inputs and outputs such as buttons, sensors, displays and communication interfaces. In a device built around one, it is the part that executes the code and coordinates the device's behaviour.
- PCB
- A printed circuit board (PCB) is a board, usually rigid, with etched copper tracks that connect electronic components together without loose wiring. Components are mounted on the board and signals route between them through the copper layout.
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