If you wanted to build a robot that chased light, you might start thinking about Raspberry Pis, cameras, and off-the-shelf computer vision systems. However, it needn’t be so complex. [Ed] of ...
A better I2C master library, originally by Wayne Truchsess. See http://dsscircuits.com/index.php/articles/66-arduino-i2c-master-library On most Arduino boards, SDA ...