Remove from PCB any pluged Arduino Nano if you are going to program the ATtiny85 from Arduino UNO pin-headers. Please refer to above video, to learn about requiered Arduino IDE configuration and ...

All PCB designs were intended to keep traces to one side of a PCB to enable the greatest number of tinkerers to create this to save them time with the ATtiny85 boot loading and programming. Hopefully ...

Anyone who would like to learn Arduino programming and more about the fantastic electronic development platform which is fun and easy-to-use to create a wide variety of different projects. Maybe ...

He finally got around to etching this ATtiny85 programming adapter. If the project is not pin hungry, an ATtiny85 can run Arduino sketches without the need to port the code.

The video below shows how to connect another Arduino to do the programming. You could also use any dedicated AVR programmer you happen to have.