USBasp制作资料及全过程的演示，包含硬件设计的全部资料-USBasp production of information and a demonstration of the entire process, including hardware design, all the information

USBasp is a USB in-circuit programmer for Atmel AVR controllers. It simply consists of an ATMega88 or an ATMega8 and a couple of passive components. The programmer uses a firmware-only USB driver, no special USB controller is needed.

schematic of a USB AVR programmer

制作USBASP下载器，包含原理图，pcb，固件，本人做个实物可以用-Production USBASP download, including schematics, pcb, firmware, I can be a real