May 29, 2019 by Dasun Tharanga
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Before we start with the circuit build, head over to the Arduino IDE.
Open the Sketch ArduinoISP from the File, Examples and ArduinoISP menus:
The Arduino software does not natively support the ATtiny85 so we need to add support for it.
Preferences Dialog
Note that you will require an internet connection for the ATtiny board manager to download.
Boards Manager
Lets set up the program to use the Arduino as a programmer.
The chip has 8 pins, to program the ATtiny85 we are interested only 6 of them MISO, MOSI, SCK, RESET, Ground, and Positive.
If you look closely at the chip you will see a dot. This is Pin 1. Pin 2 through 8 follow in an anti-clockwise order around the chip.
ATTiny85 Pinout
Conveniently the headers on the Arduino are easy to work with to program the ATtiny85.
We are ready to jump into building the programming circuit.
The programmer will now work, but I'm going to add some LED's because LED's are fun to have.
Head back over to the Arduino IDE. First we need to burn the Bootloader to the chip.
Once that is done, you can upload Arduino Sketches to the ATtiny chip, as if it were an Arduino.
Just remember the limitations to the ATtiny chip and any program within its limitations will work.
