Buy arduino pro mini atmega328p 5v official version online

This board was developed for applications & installations where space is premium và projects are made as permanent mix ups. Small, available in 3.3 V và 5 V versions, powered by ATmega328P.

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Note: This page refers khổng lồ a sản phẩm that is retired.

The Pro Mini board

The Pro Mini is a microcontroller board based on the ATmega328P.

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 sạc pin headers. A six pin sạc header can be connected lớn an FTDI cable or Sparkfun breakout board lớn provide USB power & communication to lớn the board.The 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 sạc pin layout is compatible with the Mini.

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

The Pro Mini was designed và is manufactured by SparkFun Electronics.

You can find here your board warranty information.

Getting Started

You can find in the Getting Started section all the information you need to configure your board, use the Software (IDE), và start tinker with coding và electronics.

Need Help?


OSH: Schematics Pro Mini is open-source hardware! You can build your own board using the following files:




The Pro Mini can be powered with an FTDI cable or breakout board connected to its six sạc header, or with a regulated 3.3V or 5V supply (depending on the model) on the Vcc pin. There is a voltage regulator on board so it can accept voltage up khổng lồ 12VDC. If you're supplying unregulated power to lớn the board, be sure khổng lồ connect lớn the "RAW" pin sạc on not VCC.The power pins are as follows:

RAW For supplying a raw voltage khổng lồ the board.VCC The regulated 3.3 or 5 volt supply.GND Ground pins.


The ATmega328P has 32 kB of flash memory for storing code (of which 0.5kB is used for the bootloader). It has 2 kB of SRAM & 1kBs of EEPROM (which can be read & written with the EEPROM library.

Input & Output

Each of the 14 digital pins on the Pro Mini can be used as an đầu vào or output, using pinMode,digitalWrite, and digitalRead functions. They operate at 3.3 or 5 volts (depending on the model). Each pin sạc can provide or receive a maximum of 40 mA và has an internal pull-up resistor (disconnected by default) of 20-50 kOhms. In addition, some pins have specialized functions:

Serial: 0 (RX) và 1 (TX). Used lớn receive (RX) & transmit (TX) TTL serial data. These pins are connected lớn the TX-0 & RX-1 pins of the six sạc pin header.

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SPI: 10 (SS), 11 (MOSI), 12 (MISO), 13 (SCK). These pins tư vấn SPI communication, which, although provided by the underlying hardware, is not currently included in the language.LED: 13. There is a built-in LED connected to lớn digital sạc 13. When the pin sạc is HIGH value, the LED is on, when the sạc is LOW, it's off.

The Pro Mini has 8 analog inputs, each of which provide 10 bits of resolution (i.e. 1024 different values). Four of them are on the headers on the edge of the board; two (inputs 4 và 5) on holes in the interior of the board. The analog inputs measure from ground khổng lồ VCC. Additionally, some pins have specialized functionality:

There is another sạc pin on the board:

Reset. Bring this line LOW to reset the microcontroller. Typically used to add a reset button to lớn shields which block the one on the board.


The Pro Mini has a number of facilities for communicating with a computer, another, or other microcontrollers. The ATmega328P provides UART TTL serial communication, which is available on digital pins 0 (RX) and 1 (TX). The software includes a serial monitor which allows simple textual data lớn be sent to và from the board via a USB connection.

A SoftwareSerial library allows for serial communication on any of the Pro Mini's digital pins.

The ATmega328P also supports I2C (TWI) and SPI communication. The software includes a Wire library lớn simplify use of the I2C bus; see the reference for details. Lớn use the SPI communication, please see the ATmega328P datasheet.


The Pro Mini can be programmed with the software download. For details, see the reference and tutorials.

The ATmega328P on the Pro Mini comes preburned with a bootloader that allows you to lớn upload new code to lớn it without the use of an external hardware programmer. It communicates using the original STK500 protocol reference , C header files.

You can also bypass the bootloader & program the ATmega328P with an external programmer; see these instructions for details.

Automatic (Software) Reset

Rather then requiring a physical press of the reset button before an upload, the Pro Mini is designed in a way that allows it lớn be reset by software running on a connected computer. One of the pins on the six-pin header is connected to the reset line of the ATmega328P via a 100 nF capacitor. This sạc pin connects to one of the hardware flow control lines of the USB-to-serial converter connected to lớn the header: RTS when using an FTDI cable, DTR when using the Sparkfun breakout board. When this line is asserted (taken low), the reset line drops long enough khổng lồ reset the chip. The software uses this capability to lớn allow you to lớn upload code by simply pressing the upload button in the environment. This means that the bootloader can have a shorter timeout, as the lowering of the reset line can be well-coordinated with the start of the upload.

This thiết lập has other implications. When the Pro Mini is connected to lớn either a computer running Mac OS X or Linux, it resets each time a connection is made to lớn it from software (via USB). For the following half-second or so, the bootloader is running on the Pro. While it is programmed to ignore malformed data (i.e. Anything besides an upload of new code), it will intercept the first few bytes of data sent khổng lồ the board after a connection is opened. If a sketch running on the board receives one-time configuration or other data when it first starts, make sure that the software with which it communicates waits a second after opening the connection & before sending this data.

Physical Characteristics

The dimensions of the Pro Mini PCB are approximately 0.7" x 1.3".

Tech Specs

MicrocontrollerATmega328P *
Board nguồn Supply3.35 -12 V (3.3V model) or 5 - 12 V (5V model)
Circuit Operating Voltage3.3V or 5V (depending on model)
Digital I/O Pins14
PWM Pins6
Analog đầu vào Pins6
External Interrupts2
DC Current per I/O Pin40 mA
Flash Memory32KB of which 2 KB used by bootloader *
Clock Speed8 MHz (3.3V versions) or 16 MHz (5V versions)

Older boards were equipped with ATmega 168 with this specs:

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