After two years of searching, I finally located and bought an EMRoS - the world's smallest robot in 1994. The one I got is Lubie. During the last two years, I came across quite a bit about EMRoS and I put them here.
This a a small line tracker that I build. It used 2 small geared motors which I bought from a surplus stores in Hong Kong. The circuit uses very simple parts and operates at 3V.
Author: Teddy, 3 October 2001