Introduction - If you have any usage issues, please Google them yourself
OBD2 to USB Diagnostic Tool Adapter (ELM327 Analog)
The interfaces support J1850 VPW, J1850 PWM, ISO-9141-2, ISO 14230 (KWP2000).
Files:
Project SCH&PCB - ORCAD 9.2
HEX File for PIC18F2455
Adapter Build Image