The Arduino software comes with an ArduinoISP sketch which allows an Arduino, correctly connected, to flash another AVR chip. With the use of other libraries like Attiny-core, this means you can use ...

The basic idea was to make an all in one solution for programming and operating own projects on one pcb. Due to the 5 GPIOs on the Attiny 85 the programming pins are also the operating pins. Therefor ...