Arduino Pro Mini ATmega328 5V 16MHz
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Prices updated: 12 Oct 2026
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About this product
The Arduino Pro Mini is a small ATmega328-based board with 14 digital I/O pins, 6 of them PWM capable, and 8 analog inputs, running at 5 V with a 16 MHz crystal. Designed for breadboards and space-limited projects, it has no onboard USB and is programmed through a USB-to-TTL serial adapter.
Specifications
- Microcontroller
- ATmega328
- Operating voltage
- 5 V
- Input voltage
- 7 V to 9 V
- Digital I/O pins
- 14 (6 with PWM output)
- Analog input pins
- 8
- Clock speed
- 16 MHz
- Programming
- USB-TTL serial adapter
Frequently asked questions
How do I program the Arduino Pro Mini if it has no USB port?
Connect a USB-to-TTL serial adapter to the board's TX, RX, GND and VCC pins, and select the Pro Mini board in the Arduino IDE. Use an adapter whose logic level matches the 5 V version of the board.
Which pin should I use to power the board?
The 5 V pin accepts a regulated 5 V supply directly. The RAW pin accepts an unregulated input of 7 V to 9 V, which the onboard regulator converts to 5 V.
