Arduino Boards & Compatibles

Arduino Pro Mini ATmega328P 3.3V 8MHz Compatible Board

The Arduino Pro Mini ATmega328P 3.3V 8MHz is an ultra-compact, low-power microcontroller board designed for embedded projects, wearable electronics, and battery-powered applications where space and power efficiency are critical. Based on the reliable ATmega328P microcontroller — the same chip used in the Arduino Uno — this board runs at 3.3V logic with an 8 MHz clock speed, making it ideal for low-voltage sensor networks, IoT edge nodes, and portable prototypes. Despite its tiny 33 × 18 mm footprint — roughly the size of a thumb — the Pro Mini packs 14 digital input/output pins (6 with PWM capability), 6 analog input channels, one hardware UART port, 32 KB of flash memory, 2 KB of SRAM, and 1 KB of EEPROM. It draws significantly less power than the Arduino Uno, making it a top choice for battery-driven designs. The board comes as a bare PCB with through-hole edge pads ready for soldering pin headers or direct wiring. Programming is done via an external USB-to-Serial adapter (e.g., FTDI FT232RL or CP2102) since there is no onboard USB port — this keeps the size and cost minimal. The onboard 3.3V voltage regulator accepts input from 3.4V to 12V DC, and a reset button allows easy restart. For Indian makers, students, and hobbyists, the Pro Mini 3.3V/8MHz is widely available at budget-friendly prices. It works seamlessly with the standard Arduino IDE — just select "Arduino Pro or Pro Mini" → "ATmega328P (3.3V, 8 MHz)" from the board menu. Whether you are building a weather station, a wireless sensor node, a robotic controller, or a wearable gadget, this compact powerhouse delivers professional-grade performance in the palm of your hand.