TinyFan Fan Driver

This is the TinyFan a fan (and fun) driver that controls up to 4 12V fans using just an ATTiny45 or ATTiny8, 4 tactile switches and some electronic components (most general use, aka cheap).

The programming of the ATTiny has the folowing capabilities:
+ Can use PWM in 2 of the outputs (labeled 1 and 2)
+ The tactlie switches have a secondary (special) function if held during 2 seconds.
+ The program can use EEPROM memory to save last state in the chip. Also, if you don't want this feature,