These are my electronics projects. You can find the PCB and the schematic for each project.
The usbasp-atmega8 project allows to connect an USBasp programmer to an ATmega8 microcontroller.
usbasp-atmega8-20160404.tar.xz
The usbasp-attiny2313 project allows to connect an USBasp programmer to an ATtiny2313 microcontroller.