Tutorial on AVR-C programming with ATtiny MCUs
I created a tutorial about programming ATtiny MCUs for people that are familiar to Arduino development. It includes instructions for writing AVR-C code and setting up the programmer device (ISP). The tutorial is available at instructables.com: “Honey, I Shrunk the Arduino”.
With this, you can create smaller and cheaper devices that use less energy as compared to a full-featured Arduino. Take a look at this picture for a size comparison:
The code for this tutorial is available on github.com.