SparkFun Arduino Pro Mini 328 - 5V/16MHz
Brand: SparkFunArduino Boards & Shields
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Prices updated: 12 Oct 2026
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About this product
A thin, minimal 5V Arduino Pro Mini based on the 328 chip, running at 16 MHz with the Duemilanove 328 bootloader. Its headers are not populated, so you solder your own connectors or wires, and it needs an external USB-to-serial adapter for programming.
Specifications
- Microcontroller
- ATmega328P (328 chip)
- Operating voltage
- 5V
- Clock speed
- 16 MHz
- Bootloader
- Arduino Duemilanove w/ 328
- Board thickness
- 0.8 mm
- Headers
- Not populated (solder your own)
- USB
- Not onboard, external USB-to-serial adapter required
Frequently asked questions
How do I program the Pro Mini?
Connect an external USB-to-serial adapter set to 5V, then in the Arduino IDE select the 'Arduino Duemilanove w/ 328' board, as recommended in the listing.
Can I power the Pro Mini from a 3.3V supply?
This is a 5V board designed for 5V system voltage. Do not power it from a 3.3V-only source; use a 3.3V variant of the Pro Mini for 3.3V systems.
