usb转真并口，德国原版的Altium6.7(protel),原理图。和原版完全一样。-true parallel port usb switch, the German original Altium6.7 (protel), schematic diagram. And exactly the same as the original.

用AVR单片机实现OBD解码，有代码与原理图，功能比较简陋，可用于解OBD通迅。-The realization of OBD decoding with AVR microcontroller, the code and principle diagram, function relatively simple, can be used for the solution of OBD communication.