I enjoy Robotics as a hobby. I have made a number of robots over the past few years. The details of a few of them can be found below.
The Thesus

Achievements: Stood 4th in CommQuest, Nexus at Techfest 2009-10. Central Processor: Atmega 32
Dimensions: 8cm x 8cm x 7cm
Motor Drivers: L293D
Sensors: A set of 3 IR sensors with Band Pass filters and Amplifiers
Motors: Stepper
Batteries: 4 3.7V Li-poly, 1800 mAhr
The Micromouse

Achievements: Stood among top 15 teams in the country at Techfest 2008-09 Central Processor: Atmega 16
Dimensions: 10cm x 10cm x 8cm
Motor Drivers: L293D
Sensors: 3 IR sensors with High Pass filters
Motors: Stepper
Batteries: 4 4.2V Li-ion, 2100 mAhr