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The Arduino Pro Mini is a microcontroller board based on the ATmega328 (datasheet). It has 14 digital input/output pins (of which 6 can be used as PWM outputs), 6 analog inputs, an on-board resonator, a reset button, and holes for mounting pin headers. A six pin header can be connected to an FTDI cable or Sparkfun breakout board to provide USB power and communication to the board.

The Arduino Pro Mini is intended for semi-permanent installation in objects or exhibitions. The board comes without pre-mounted headers, allowing the use of various types of connectors or direct soldering of wires. The pin layout is compatible with the Arduino Mini.

There are two version of the Pro Mini. One runs at 3.3V and 8 MHz, the other at 5V and 16 MHz.

The Arduino Pro Mini was designed and manufactured by SparkFun Electronics.

Schematic & Reference Design

EAGLE files: arduino-pro-mini-reference-design.zip

Schematic: Arduino-Pro-Mini-schematic.pdf


Operating Voltage3.3V or 5V (depending on model)
Input Voltage3.35 -12 V (3.3V model) or 5 - 12 V (5V model)
Digital I/O Pins14 (of which 6 provide PWM output)
Analog Input Pins6
DC Current per I/O Pin40 mA
Flash Memory32 kB (of which 0.5 kB used by bootloader)
Clock Speed8 MHz (3.3V model) or 16 MHz (5V model)

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