[Fixed tag.]

Harley Shanko wrote:
> Curious if anyone has ever run across/done a design (HW/FW) for a 
> PIC-based
> OBD II for GM vehicles (uses the J1850 standard)?
>
> I've been using PIC16F87x for several years.  Probably is overkill for 
> this
> project, but have some pcbs which probably could be used to prototype such 
> a
> design.  Save doing a pcb for it.  To start it would probably display on a 
> 4
> line x 20 char LCD.
>
> Any ideas, suggestions, etc. would be greatly appreciated.
>
> Harley
> ps - this is mainly as a learning experience

J1850 VPW to RS232 interpreter based on a PIC12C509 (proprietary, no code):
    www.elmelectronics.com

FlexScan - based on a MC68HC58 (schematics, assembly source):
    http://www.fieros.de/en/flexscan.html

OBD Scanner by Jay Shroff (Circuit Cellar project):
    http://www.circuitcellar.com/psoc2004/winners/c2974.htm

AVR-Based Fuel Consumption Gauge (Circuit Cellar project):
    http://www.circuitcellar.com/advertise/cc-advertising/Lightner-183.pdf

Automotive Scan Tool by George Kaldis (Circuit Cellar project):
    http://www.circuitcellar.com/renesas2005m16c/winners/DE/1756.htm

ScanTool.net, LLC (the company I work for) Forum:
    http://www.scantool.net/forum/

OBD2Cables.com - in case you decide to buy an OBD-II cable for your project:
    http://www.obd2cables.com

Best regards,

Vitaliy 

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