his board was created for applications and installations when space is limited and projects are created as long-term installations. The ATmega328P is a small microcontroller that is available in 3.3 V and 5 V versions. The ATmega328P-based Arduino Pro Mini is a microcontroller board. It contains 14 digital input/output pins (six of which are PWM outputs), six analog inputs, an integrated resonator, a reset button, and mounting holes for pin headers.
To give USB power and communication to the board, a six-pin header can be linked to an FTDI cable or a Spark fun breakout board. The Arduino Pro Mini is designed to be installed in semi-permanent items or exhibitions. The board is shipped without pre-installed headers, allowing for the use of a variety of connectors or direct soldering of components. The Arduino Pro Mini is designed to be installed in semi-permanent items or exhibitions. The board is shipped without pre-installed headers, allowing for the use of a variety of connections or direct wire soldering. The Arduino Mini is compatible with the pin layout. The Pro Mini is available in two versions. One operates at 3.3 volts and 8 MHz, while the other operates at 5 volts and 16 MHz. SparkFun Electronics created and manufactures the Arduino Pro Mini. The Arduino Pro Mini is a free and open-source piece of hardware.
The Arduino Pro Mini can be powered by its six-pin header with an FTDI cable or breakout board, or via the Vcc pin with a regulated 3.3V or 5V supply (depending on the model). A voltage regulator is installed on the board, allowing it to accept voltages of up to 12VDC. If you’re giving the board unregulated power, make sure to connect it to the “RAW” pin instead of VCC. The following are the power pins:
a)RAW: To feed the board with a raw voltage.
b)VCC: The 3.3 or 5 volt supply is controlled.
c)Ground pins (GND)
For storing code, the ATmega328P contains 32 kB of flash memory (of which 0.5kB is used for the bootloader). It has 2 KB of SRAM and 1 KB of EEPROM (read and writeable using the EEPROM library). Using the pinMode, digital Write, and digital Read routines, each of the Pro Mini’s 14 digital pins can be utilized as an input or output. They run on either 3.3 or 5 volts (depending on the model). Each pin includes a 20-50 KOhm internal pull-up resistor (disconnected by default) and may deliver or receive a maximum of 40 mA.