Best list of arduino project ideas along with sources we have published here. It includes arduino based battery charger, arduino based thermostat and etc..
Easy and best arduino projects for beginners with code and circuit diagram explanation.
Arduino Projects: Greenhouse
How To Make Arduino Based Home Automation Project?
Circuit Schematic of Arduino Bluetooth RC Car. more info: http://www.ardumotive.com/arduino-car
Arduino Projects: Arduino Pro Mini Based Projects | Simple Arduino Projects & Circuits
Get latest Arduino Projects for Engineering Students - 2014 in the post: http://www.electronicshub.org/arduino-project-ideas/