Just wondering if it’s feasible to “easily” make ATtiny85’s into AVR programmers?
I’m making a little AVR programming box for our learning centre. I’d much rather use our centre’s extreme excess of ATtiny85’s for a buck each rather than use an actual Arduino. I saw that there is SPI on a diagram here http://arduinoelettronica.files.wordpress.com/2012/02/attiny85_pinout.png
I’ve also read that ATtiny’s do not actually have native SPI, so I’m not sure if this is even possible. Or how much fuse-diving and code-diving would be involved. Or if SPI is even needed necessarily.
Any direction, suggestions, or comments are greatly appreciated. The idea is to be able to flash code for other ATtiny’s, ATmega’s, and maybe even other MCU’s if possible.