ATtiny45’s can be easily programed using your arduino. Just follow the tutorial at MIT Media’s High-Low Tech Lab. Data sheet found from Atmel.
I use these for classes and my own projects because they are:
- inexpensive, 100 for $63 USD at digiKey
- small and easy to modify
- enough memory for basic programs, 4KB
- works with eTextiles and paper computing
programing ATtiny to blink LEDs using an Arduino Uno
Time to get to work – I’ve 100 ATtiny45’s to program!