Sparkfun Pro Micro - 5V/16MHz

SparkFun's Pro Micro is a powerful, Arduino-compatible microcontroller designed with an on-board ATmega32U4. The 32U4's built-in USB transceiver eliminates the need for an external USB interface, making this compact board ideal for projects where space is at a premium. The Pro Micro is packed with features. It has 9 channels of 10-bit ADC, 5 PWM pins, and 12 DIOs, as well as hardware serial connections Rx and Tx. It operates at 16MHz and 5V, similar to other popular Arduino-compatible boards. A voltage regulator is included on the board, allowing it to accept voltage up to 12VDC. If you're providing unregulated power, make sure to connect to the "RAW" pin, not VCC.The most recent revision of the Pro Micro has corrected the silk error from the previous version, ensuring that pin 14 is accurately labeled. Additionally, SparkFun has enhanced the power circuit with a PTC fuse and diode protection, and rectified the RX and TX LED circuit.The Pro Micro is an excellent choice for a range of applications. Its small size, roughly 3.3cm x 1.8cm, makes it SparkFun's smallest Arduino-compatible board yet, perfect for embedding in a variety of projects. Whether you're a seasoned Arduino enthusiast or a beginner looking for a versatile, compact microcontroller, the Pro Micro offers a blend of size, power, and functionality that's tough to beat.Features:

* ATmega32U4 running at 5V/16MHz * Compatible with Arduino IDE v1.0.1+ * On-board micro-USB connector for programming * 9x 10-bit ADC pins * 12x Digital I/Os (5 are PWM capable) * Rx and Tx Hardware Serial Connections * SparkFun's smallest Arduino-compatible board * 3.3cm x 1.8cm Documents:

* Schematic * Eagle Files * Board Dimensions * Hookup Guide * Graphical Datasheet * Datasheet (ATmega32U4) * Firmware Note * Arduino Addon Files * Arduino Addon Files (IDE 1.5+) * GitHub (Design Files)