Why, why, why oh why ? a line follower

Well it looks fun, not excessively complex, and even though I don't have the slightest idea of the purpose of that once built and shown to the lady, it seems a motivating project and finally a chance to use those motors I scavenged here and there and never used. Also, I'll train my skills in prevision of building my laser cutter CNC ...

Links

Tutorials

• Very smart idea : with CdS and a transistor, if you're white it's full power on the wheel and the more you're in the black the lesser power the slower that wheel's turning and the other wheel (cross fingers : being on white) will turn fast. Simple, smart and elegant, I love it.
  • http://www.ermicro.com/blog/?p=1097
• Same site, using a quand amp LM324
  • http://www.ermicro.com/blog/?p=1908