Programming - Arduino MINI PRO 3.3V User Manual

If you have a supply that's greater than 3.3V (but less than 12V), you'll want to connect that to
the RAW pin on the Mini. This pin is akin to the VIN pin, or even the barrel jack, on the Arduino Uno.
The voltage applied here is regulated to 3.3V before it gets to the processor.
If you already have a regulated 3.3V source from somewhere else in your project, you can connect that
directly to the VCC pin. This will bypass the regulator and directly power the ATmega328. Don't forget
to connect the grounds (GND) too!
There is a third power option that's only usually available while you're programming the Pro Mini.
The FTDI Basic Breakout can be used to power the Mini via your computer's USB port. Keep in mind
that this option may not be available when your project has entered the wild, absent from any
computers or USB supplies.
That leads us to the next section...programming the Arduino Pro Mini.

Programming:

If you've never used an Arduino before (how bold of you to go straight for the Mini!), you'll need
to download the IDE.
The first time you plug the FTDI Basic Breakout in, you may need to install drivers for it.
Once both Arduino and the FTDI drivers are installed, it's time to get programming. We'll start by
uploading everyone's favorite sketch: Blink. Open up Arduino, then open the Blink sketch by going
to File > Examples > 01.Basics > Blink .
Before we can upload the sketch to the Mini, you'll need to tell Arduino what board you're using. Go
to Tools > Board and select Arduino Pro or Pro Mini.
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