This tutorial presumes that you have sufficient privileges to install device drivers in Windows Operating Systems (whilst the USBasp programmer will work on a wide variety of operating systems, my ...

February 9, 2012 The V-USB library is a pretty handy piece of code that lets you add USB connectivity to ATtiny microcontrollers (it was previously named tinyUSB).

To program these chips, [Aaron] first had to wire up the microcontroller into a circuit. This was just a bit of perf board, a resistor, a few caps, and a USB A plug.