ATTINY85 AVR IC with only 6 GPIO pins is best suitable for small and medium projects.
By default it is set to work from internal oscillator, avoiding external crystal.
It has 8KB FLASH Memory and 512Bytes of RAM.
ATTINY can be programmed in many ways.This video describes AVR coding using WINAVR and USBASP.
Download files:
http://www.alselectro.com/files/softw...