I built one and... surprise surprise... the USB part doesn't work. Should anyone want to share their success, I would very much appreciate to know what firmware they used. To build the hardware I used these sites: 1 , 2 and 3 , which are consistent as far as the hardware. They also provided the hex…

<SOLVED> Has anyone built an USBtinyISP based on ATtiny45/85 ?

swe-dude October 24, 2015, 6:54am 9

This is how i have it connected:

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