All Products

SKU: LB-PT9012

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 resona...

SKU: SF-DEV-10524

The name says it all on this one. An ATmega328 in DIP package, pre-loaded with the Arduino Optiboot (Uno 16MHz) Bootloader. This will allow you to use Arduino code in your custom embedded project without having to use an actual Arduino board. To get this chip working with Arduino IDE, you wi...

SKU: SF-DEV-15164

The SparkFun Qwiic OpenLog is an I²C-based data logger that stores serial data to a microSD card. Based on the popular OpenLog, this version replaces the serial interface with I²C and Qwiic connectors, allowing you to daisy-chain multiple sensors and log data without occupying your serial port. ...

SKU: SF-DEV-18158 · MPN: DEV-18158

This Arduino-compatible development board keeps the familiar Uno-style layout while adding a few genuinely handy upgrades for modern projects. Built around the ATmega328P, it works with the Arduino IDE and fits the Uno R3 footprint, so it is a straightforward choice if you want broad compatibilit...

SKU: AF-2488

The Adafruit METRO 328 is a fully assembled, Arduino UNO R3-compatible development board powered by the ATmega328P running at 16 MHz. It's shape and pin-compatible with Arduino UNO R3 shields, and works directly with the Arduino IDE by selecting "Arduino UNO" in the Boards menu. This version come...

SKU: AF-123

A pre-programmed ATmega328P chip with the Adafruit 'ADAboot' bootloader, ready to drop into an Arduino Uno, Duemilanove, Diecimila, or NG board. Use it to replace a damaged chip or build your own Arduino-compatible project on a breadboard or custom PCB. The ADAboot bootloader is compatible with ...

SKU: DF-DFR0216-2 · MPN: DFR0216-2

This compact DFRobot microcontroller bundle is designed for learning, prototyping and physical computing projects. The DFRduino Uno V3.0 is fully compatible with Arduino UNO R3 and the Arduino IDE open-source development environment, which uses the Processing / Wiring language.The board is based ...

SKU: EC-AAM328AT

This is a ATmega328 IC in DIP package, pre-loaded with the Arduino Optiboot (Atmega328 16MHz) Bootloader. This will allow you to use Arduino code in your custom embedded project without having to use an actual Arduino board.To get this chip works, you will need an external 16MHz crystal or resona...

SKU: EC-ELE18721S

An Arduino UNO R3 compatible development board from Elecrow, built around the ATmega328P microcontroller with an ATmega16U2 for USB communication. Fully compatible with the Arduino IDE and the vast ecosystem of Arduino shields, libraries, and tutorials — a great starting point for learning electr...

SKU: EC-CDD10240D

The devDuino Relay 1 Node V1.0 is a compact Arduino-compatible microcontroller board with a built-in mains power supply (110–220 V AC), a 10 A relay, and an nRF24L01+ wireless transceiver. It is designed for building wireless home automation networks with support for over-the-air (OTA) firmware u...

SKU: SF-COM-11441

A 4-digit 7-segment display with a built-in ATmega328 microcontroller, controllable via Serial TTL, SPI, or I²C — no complex wiring or multiplexing required. Each segment, decimal point, apostrophe, and colon can be individually controlled. The ATmega328 comes pre-loaded with the Arduino bootload...

SKU: SF-COM-11442

The SparkFun 7-Segment Serial Display combines a 4-digit 7-segment LED display with an ATmega328 microcontroller, allowing you to control every segment using just a few serial lines. It supports three communication interfaces — Serial TTL, SPI, and I²C — making it easy to integrate into a wide ra...

SKU: AF-2590

The Adafruit Metro Mini 328 packs the same ATmega328P power as a full-sized Metro into a tiny breadboard-friendly form factor. Running at 16 MHz with 5V logic, it's pin-compatible with Arduino UNO R3 and works with the Arduino IDE by selecting "Arduino UNO" in the Boards menu. For the latest revi...

SKU: PI-A000073

The board everybody gets started with, with the ATmega328 (SMD). It has 14 digital IO pins (6 can be used as PWM outputs), 6 analog inputs, a 16 MHz crystal oscillator, a USB connection, a power jack, and more. The Arduino Uno SMD R3 is a microcontroller board based on the ATmeg...

SKU: AF-50

We sure love the ATmega328 here at Adafruit, and we use them a lot for our own projects. The processor has plenty of GPIO, Analog inputs, hardware UART SPI and I2C, timers and PWM galore - just enough for most simple projects. When we need to go small, we use a Metro Mini or a Trinket M0,...

SKU: AF-193

This budget pack is an optimized collection of parts and pieces to experiment with Adafruit Metro 328 and the Arduino IDE at home, school or work. Great for students and those that want to get their feet wet, no soldering required!Includes the Adafruit Metro 328 with thru-hole heade...

SKU: EC-ACM82664A

The Crowduino UNO ESP8266 combines an Arduino UNO-compatible microcontroller with an onboard ESP8266 WiFi module in a single, compact board. Instead of wiring a separate WiFi shield or module, you get integrated wireless connectivity right out of the box. Built around the ATmega328 running at 16...

SKU: AF-3345

The Adafruit Metro Starter Pack is the perfect beginner kit for learning electronics and Arduino programming. Built around the Adafruit Metro 328 (ATmega328-based, Arduino UNO R3-compatible), this pack includes everything you need — except tools — to follow along with introductory tutorials and s...

SKU: SF-SPX-14669

The SparkFun BlackBoard is an Arduino Uno-compatible development board with a range of improvements over the standard Uno. It features the CH340G USB-to-serial converter for broad driver compatibility, a reinforced through-hole micro-B USB connector, an upgraded 600 mA 3.3V regulator with thermal...

SKU: SF-SWG-19631

This is a sticker sized to the ATMEGA328 IC with the pinout printed on top.