I have seen some posts talking about using the BoD, but it apparently requires fuse programming that I am not familiar with.
Is that something that can be done strictly in the arduino environment or is something else required?
An example of using the BoD in arduino would be great.
I am using the Adafruit Trinket pro 3V device with an FTDI cable.
Search the forum for "brownout detector".
I did that and read the first 10 or so posts that came up. They mostly talk about fuse settings but there is nothing I can see that says how to do that in the arduino environment. Nor do I see any examples.
Funny, when I did that, the very first hit gave all the details: http://forum.arduino.cc/index.php?topic=127394.0
To set the Fuses, you need a Programmer - it connects to the ICSP header (the SPI pins SCK, MISO, MOSI, Reset, power, Gnd) to access the memory and fuses directly.
You can change the fuses in boards.txt for the board type you are using and Burn Bootloader as the simplest way to change the fuses.
uno.bootloader.low_fuses=0xff
uno.bootloader.high_fuses=0xde
uno.bootloader.extended_fuses=0x05
The lower 3 bits of the Extended Fuse set the brownout level per Table 28-6 of the datasheet.
Table 29-12 shows the valid settings:
111 - disabled
110 - 1.8V typical
101 - 2.7V typical (the 0x05 above)
100 - 4.3V typical
000 to 011 - reserved
...and the best programmer is a second Arduino.