I'll use this page as a blog to keep track of my project. It will be a working doc during the process. When finished I will do a clean-up and write a description of steps taken + the final result.
Low power sensor node (<$12) by Maniacbug
Using an Atmega328P MCU, nRF24L01+ radio, 3V | 540mAh coin cell to measure room temperature wirelessly on intervals.
Libraries, EAGLE circuit and PCB available Link
Mini FET board by IDEO Labs
A small shield for Arduino Pro Mini
EAGLE circuit and board available, Link
The Arduino Split