It’s possible to transfer your Arduino sketches on ATtiny85 by using Arduino Uno (in this example) as ISP programmer.

Setup:

  • Upload “ArduionISP” sketch (which is found in default Arduino examples) in to your Arduino. Now it became programmer, than do the connection below.
  • Download ATtiny board definitions and install like; Documents > Arduino > hardware > attiny > avr
  • Select
    • Tools->Board->ATTiny
    • Tools->Clock->8Mhz (internal)
    • Tools->Processor->ATTiny85
    • Tools->Programmer->Arduino as ISP

Connections:

  • Arduino +5V      —>  ATtiny Pin 8
  • Arduino Ground —>  ATtiny Pin 4
  • Arduino Pin 10   —>  ATtiny Pin 1
  • Arduino Pin 11    —>  ATtiny Pin 5
  • Arduino Pin 12    —>  ATtiny Pin 6
  • Arduino Pin 13    —>  ATtiny Pin 7
ATtiny45-85
ATtiny45-85

 

 

 

Some resources about the same work:

http://www.instructables.com/id/Program-an-ATtiny-with-Arduino/

https://learn.sparkfun.com/tutorials/tiny-avr-programmer-hookup-guide/attiny85-use-hints

http://highlowtech.org/?p=1695