A great set of design and construction articles awaits the curious robot builder at IKALOGIC.com where Ibrahim KAMAL discusses theory and implementation of line tracking, dead reckoning, drive trains, motor drive, motor control, and microcontrollers. Tossed into the mix are articles discussing basic electronics including understanding how resistors, current, and voltage are related, how transistors work, mechanical switch debouncing, DAC construction, and ideas about projects cases. Ibrahim's articles are well-written and include theory right along with the nuts and bolts of schematics, source code, and troubleshooting.