CH340 Nano Board ATmega328P Soldered

The Nano form factor exists for the projects where an Uno's full-size footprint simply does not fit - a compact enclosure, a breadboard already crowded with other components - while keeping essentially the same ATmega328P capability: 14 digital I/O pins, 8 analog inputs and the same 16MHz clock speed most Arduino sketches already assume. The CH340 USB-to-serial chip is the budget-friendly alternative to the FTDI chip on official boards, requiring a driver install on some systems but otherwise functioning identically for programming and serial monitor use.

Coming pre-soldered with pin headers already installed means it plugs directly into a breadboard the moment it arrives, without a soldering session before the first project can start. At 45 by 18mm, it is small enough to leave embedded in a finished project rather than needing to be freed up for the next one.

Standard choice for breadboard prototyping, compact embedded projects, and any build wanting Uno-equivalent capability in a footprint that actually fits a tight enclosure.