Below research notes and links that were not digested in any way yet.
Could be of use in future – may be
http://blog.makezine.com/2012/06/20/tinydino-worlds-smallest-arduino-clone/
http://blog.makezine.com/2012/12/12/new-product-alamode-arduino-compatible-shield-for-raspberry-pi/
http://www.electronicsinfoline.com/New/Home_Automation/page_2/
http://homemadecircuitsandschematics.blogspot.com/
http://home.roadrunner.com/~perks/micros/Projects/Stripboard_EAGLE/Stripboard_EAGLE.htm
http://www.ermicro.com/blog/?p=423
http://www.sparkfun.com/tutorials/108
http://content.solarbotics.com/products/sample_code/fireflyv1.ino
http://www.engblaze.com/microcontroller-tutorial-avr-and-arduino-timer-interrupts/
Voltage multipliers : Diodes And Rectifiers
Working with the Comparator Circuit | ermicroblog
http://www.engineersgarage.com/articles/list
Insight – Working of SMPS | How SMPS works – EngineersGarage