Pro Mini 3.3V 8M 5V 16M atmega328 Replace ATmega128 for Arduino Compatible Nano

About this deal

This is an Arduino Pro Mini compatible board based on the ATmega328 microcontroller, available in two variants: 3.3V running at 8MHz and 5V running at 16MHz. It features 14 digital input/output pins (of which 6 can be used as PWM outputs), 6 analogue inputs, an on-board resonator, a reset button, and holes for mounting pin headers. The ATmega328 provides 32KB of flash memory, 2KB of SRAM, and 1KB of EEPROM. The chip also supports I2C and SPI communication. The board is intended for semi-permanent installation in objects or exhibitions, and comes without pre-mounted headers, allowing the use of various types of connectors or direct soldering of wires. There is no USB port on the board, so a separate FTDI adapter or USB-to-serial converter is required for programming. The 3.3V variant is well suited to projects that interface directly with 3.3V sensors and modules such as GPS or accelerometers without the need for logic-level shifting, while the 5V variant offers full Arduino Uno-compatible speed. Its compact size makes it a popular choice for embedded and space-constrained projects.