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Arduino Pro Mini 328 - 5 V / 16 MHz (With Header)
Pro Mini comes with unsoldered headers in a package. Pro Mini is very close to Arduino Mini board respect its features. However, Pro Mini has a different pin array than Mini board. It is not possible to use one instead of the other one.
Package content:
Pro Mini is a microcontroller board based on Atmega328. There are 16 digital I/O pins (6 of them are PWM out), 8 analog input pins, a 16MHz crystal oscilator and a reset button on the board. This board is designed for the places with very limited dimensions and to use it on a breadboard. Pro Mini has no a usb socket and programmer chip. To program this board it is possible to use USB-Serial Converter or any other usb-serial converters.
There are two different versions of Pro Mini board; 3.3V / 8Mhz and 5V / 16Mhz
Technical Specifications:
Power:
Arduino Pro Mini can be supplied via 5V pin or an external voltage source. 5V can be connected to VCC pin. External voltage source would be an AC - DC adapter or a battery. When it is supplied with an external voltage supply or battery. The battery can be connected to the board via GND and Vin pins.
7 - 20V can be used as an external supply but these are the limits for Uno. Recommanded voltage supply for this board is between 7 - 20V.
Operating voltage of the Arduino Pro Mini's microcontroller is 5V. If the voltage supplies the board via RAW pin, then this voltage is regulated to 5V and distributed to the board by the regulator.
Power pins are like that:
Note: There is not an 3.3V regulator on this board.
Memory:
Atmega328 has an 32 kB flash memory (0.5 kB of this is used by the bootloader), 2 kB SRAM and 1 kB EEPROM.
Input and Output:
All of the 14 digital pins on the Arduino Pro Mini board can be configured both as an input or an output. Even the same microcontroller is used in the Pro Mini board, there are 6 analog inputs on it. But, there are 8 analog input pins on the Mini Pro board. All of these analog pins can be configured as digital input or output. In total there are 22 digital input - output pins on the board. Logic level of these pins are all 5V. All of these pins are able to provide an output current up to 40 mA. Additionally, some of these pins have diffrent features too, listed below:
You may view the pin mapping page from this link.
Communication:
There are several options for Pro Mini to communicate with another arduino or microcontroller. Atmega328 provides UART TTL (5V) Serial communication via its 0 (RX) and 1 (TX) pins
There is a phsycally serial port on the Pro Mini board but this number can be increased with the SoftwareSerial library as software.
Atmega328 provides I2C and SPI ports too. Wire library if to use I2C and SPI library is for SPI communication.
Programming:
Pro Mini board can be programmed with the Arduino computer software (Arduino IDE). To program this board it is possible to use USB-Serial Converter or any other usb-serial converters.
You can start programming by choosing Pro Mini under tools > board menu on the Arduino IDE. For details you may see the referance and the basic functions page. Atmega328 on the Pro Mini board comes together with a specific software installed, named bootloader. Thanks to this it is not needed to use an external programming device to program Pro Mini. Communication is supplied by and original STK500 protocol.
The board can be programmed by using ICSP headers via ISP programmer instead of bootloader software (bootloading the Pro Mini).
Note: Pro Mini comes with unsoldered male headers.
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