SparkFun Pro Mini ATmega328-3.3V/8MHz Development Board - Compatible with Arduino Boards

SparkFun Pro Mini ATmega328-3.3V/8MHz Development Board Compatible with Arduino Boards and IDE

SparkFun Pro Mini ATmega328-3.3V/8MHz Development Board - Compatible with Arduino Boards

The Pro Mini is SparkFun's minimal design approach to Arduino. This is a 3.3V Arduino board running the 8MHz bootloader. The Pro Mini does not come with connectors populated so that you can solder in any connector or wire with any orientation you need. This Pro Mini had male headers soldered into all pins, so it could slot directly into a breadboard. Notice the programming header pins are soldered "upside-down", to keep them accessible. Programming the Pro Mini. The Pro Mini included in the assembly of a project. The Pro Mini's pins surround three of the four sides. The pins on the short side are used for programming, they match up to the FTDI Basic Breakout. The pins on the other two sides are an assortment of power and GPIO pins (just like the standard Arduino). There are three different power-related pins: GND, VCC, and RAW. GND, obviously, is the common/ground/0V reference. RAW is the input voltage that runs into the regulator. The voltage at this input can be anywhere from 3.4 to 12V. The voltage at VCC is supplied directly to the Pro Mini, so any voltage applied to that pin should already be regulated to 3.3V. Four pins are actually not located on the edge of the board: A4, A5, A6 and A7. Each of these analog pins is labeled on the back side of the board. The Mini packs almost as much microprocessor-punch as the regular Arduino, but there are a few major hardware changes you should be aware of before you start adapting your project to the Mini. The first glaring hardware difference is the voltage that the Mini operates at: 3.3V. Unlike the Arduino Uno, which has both a 5V and 3.3V regulator on board, the Mini only has one regulator. This means that if you've got peripherals that only work at 5V, you might have to do some level shifting before you hook it up to the Pro Mini (or you could go for the 5V variant of the Pro Mini). Another major variation from the standard Arduino lies in the speed at which the ATmega328 runs. The Pro Mini 3.3V runs at 8MHz, half the speed of an Arduino Uno. We put a slower resonator on the Mini to ensure safe operation of the ATmega. That said, don't let the slower speed scare you away from using the Mini; 8MHz is still plenty fast, and the Mini will still be capable of controlling almost any project the Arduino Uno can. Since 2003, SparkFun has been helping turn ideas into reality. We're here to help you start something. Visit the Store Visit the Store Visit the Store Visit the Store Visit the Store

Key Features

• ✅ ATmega328: 8MHz bootloader with external resonator (0.5% tolerance) Connects directly to the FTDI Basic Breakout board (sold separately) and also supports auto-reset
• ✅ No USB connection on board: This way you can solder in any connector or wire with any orientation you need
• ✅ Features: 3.3V regulator, Max 150mA output, Over current protected, DC input 3.3V up to 12V, On board Power and Status LEDs, Analog Pins: 8 Low voltage board need no interfacing circuitry to popular 3.3V devices and modules
• ✅ On board voltage regulator: Supports DC input 3.3V up to 12V, Board dimensions 0.7x1.3" (18x33mm)
• ✅ Note: The latest and greatest version of this board uses the ADC6 and ADC7 pins as well as adds footprints for optional I2C pull-up resistors, if supplying unregulated power to the board connect the "RAW" pin on not VCC

✅ Product Dimensions: 3.15 x 1.97 x 0.2 inches

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