{"title":"Adafruit Feather 32u4 Basic Proto","handle":"adafruit-feather-32u4-basic-proto","url":"/products/adafruit-feather-32u4-basic-proto","description":"The Feather 32u4 Basic Proto is the no-frills member of the Feather 32u4 family, with a built-in prototyping area where you can solder on extra components like buttons, sensors, or connectors without needing a separate breadboard.\n\nBuilt around the ATmega32u4 running at 8 MHz with 3.3V logic and native USB support, this board can act as a serial device, keyboard, mouse, or USB MIDI controller. Built-in LiPo battery charging and automatic USB/battery switching make it ideal for portable projects.\n\nKey Features\n\n\nATmega32u4 @ 8 MHz – 3.3V logic, 32KB flash, 2KB RAM\n\nNative USB – Built-in USB bootloader, serial debugging, and HID device support\n\nBuilt-in Prototyping Area – Solderable space for quick component additions\n\n20 GPIO Pins – Including 10 analogue inputs (one used for battery monitoring) and 7 PWM outputs\n\nHardware Serial, I2C & SPI – Full peripheral support\n\nBuilt-in LiPo Charger – 100 mA charging with status indicator LED\n\nBattery Monitoring – Battery voltage routed to an analogue pin via divider\n\n3.3V Regulator – 500 mA peak current output\n\nPin #13 Red LED – General-purpose blinking\n\n\nSpecifications\n\n\nDimensions – 51 × 23 × 8 mm (without headers)\n\nWeight – 4.8 g\n\nMounting – 4 mounting holes\n\n\nAlso Available\n\n\nFeather 32u4 Adalogger – With MicroSD card holder\n\nFeather 32u4 Bluefruit LE – With Bluetooth Low Energy\nFeather 32u4 RFM95 LoRa Radio (868/915 MHz)\nFeather 32u4 RFM96 LoRa Radio (433 MHz)\n\nFeather 32u4 FONA – With cellular connectivity\n\nFeather 328P – ATmega328P variant\n\n\nIdeal For\n\nQuick prototyping with onboard solderable area\nPortable Arduino-compatible projects\nUSB HID devices (keyboard, mouse, MIDI)\n\n\nPackage Contents\n\n1× Assembled and tested Feather 32u4 Basic Proto\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":10145,"title":"Default Title","sku":"AF-2771","price":39.35,"on_sale":false,"in_stock":true,"available_quantity":47,"option1":"Default Title"}]}