{"title":"Adafruit Feather 328P - Atmega328P 3.3V @ 8 MHz","handle":"adafruit-feather-328p-atmega328p-3-3v-8-mhz","url":"/products/adafruit-feather-328p-atmega328p-3-3v-8-mhz","description":"The Feather 328P brings the classic ATmega328P into the Feather ecosystem, running at 3.3V and 8 MHz. If you want to keep your existing Arduino code compatibility while taking advantage of the Feather form factor and its wide range of FeatherWing add-ons, this board is an excellent choice.\n\nWith built-in USB-to-serial via the CP2104, LiPo battery charging, and a small prototyping area for quick sensor or button connections, the Feather 328P is ready for portable projects straight out of the box.\n\nKey Features\n\n\nATmega328P @ 8 MHz – 3.3V logic, 32KB flash, 2KB RAM\n\nCP2104 USB-Serial – Built-in USB bootloader for programming and serial debugging\n\n21 GPIO Pins – 19 digital I/O plus 2 analogue-input-only pins\n\n8× Analogue Inputs – Two shared with I2C\n\n6× PWM Outputs – For motor control, LEDs, and more\n\nHardware I2C & SPI – UART devices should use SoftwareSerial\n\nBuilt-in LiPo Charger – 100 mA charging with status indicator LED\n\nBattery Monitoring – Battery voltage routed through a divider to an analogue pin\n\n3.3V Regulator – 500 mA peak current output\n\nPrototyping Area – Small solderable area for quick component additions\n\nPin #13 LED – Red LED for general-purpose blinking\n\nRX & TX LEDs – Visual indicators for serial data activity\n\n\nSpecifications\n\n\nDimensions – 51 × 23 × 8 mm (without headers)\n\nWeight – 4.8 g\n\nLogic Level – 3.3V\n\nMounting – 4 mounting holes\n\n\nIdeal For\n\nPortable Arduino projects with battery power\nClassic ATmega328P code compatibility in the Feather form factor\nExpanding with FeatherWing add-on boards\n\n\nPackage Contents\n\n1× Assembled and tested Feather 328P\n1× Header set\n\n\n\nNote: LiPo battery and USB cable are sold separately.\n","vendor":"Adafruit","product_type":"physical","in_stock":true,"options":[],"variants":[{"id":8286,"title":"Default Title","sku":"AF-3458","price":25.45,"on_sale":false,"in_stock":true,"available_quantity":100,"option1":"Default Title"}]}