Hello Boris, Tuesday, January 13, 2015, 9:57:35 PM, you wrote: > I never used one but the price is so tempting : > http://www.microcenter.com/product/431996/Arduino_Pro_Mini_Board Arduinos are AWESOME! I got a Mega kit for Christmas and have been loving it. I'm already planning a number of geocaches using them, especially the Arduino Nano. ;c) R~