1. wowzers!!! if only this worked for cars in 94/95 when they had "hybrid" data ports. Id be down to buy one if there was a link, not because I need one, but to help this guy out and say thank you for the effort.

Posted at 3:06PM on Nov 7th 2007 by jimmythecow

2. yeah i'd buy one of these for $15. wondering how you get from db9 to the obdii port though; he doesn't mention it at all.

Posted at 3:36PM on Nov 7th 2007 by Brendan Shanks

3. The 9pin to OBDII cables are readily available cheaply on Ebay, that's where I got mine, or can be built yourself.

For $15 I'll scrap making my own, and get one of these for my car computer. My effort can be better spent making new software, not duplicating the wheel.

Posted at 4:00PM on Nov 7th 2007 by PosiCat

4. nice, give us more OBDII hacks!

Posted at 4:21PM on Nov 7th 2007 by undacova

5. Awesome work,

how hard was implementing a virtual com port - serial bridge with a usb capable pic?

Posted at 4:33PM on Nov 7th 2007 by emperor_dane

6. Sweet. I already emailed him about selling the Multi-adapter board. This could be some fun.

Posted at 4:34PM on Nov 7th 2007 by jake

7. i've contacted him as well about his multiadapter board. i am quite interested in this project, i just dont have the time to make a pcb right now, hopefully he has them available for $6 still.

Posted at 4:41PM on Nov 7th 2007 by goliath

8. @ Brendan Shanks
He tells you on the site (now at least) which pins on the OBD2 connector go into the serial port. You could hak together your own cable or direct wire the system if you want to.

Hardest thing will be the OBD2 connectors as i dont know where to get those.

Posted at 4:42PM on Nov 7th 2007 by hal hockersmith

9. ODBII Connectors
----------------
http://www.mouser.com/search/Refine.aspx?Ne=1447464+254016+688693+2355233&N=1323038+4294735587+2355233&GetRecs=1&Ns=P_SField&Msb=0&RefType=Header

Posted at 5:12PM on Nov 7th 2007 by Nate

10. OBD2 cables can be purchased from http://www.obd2cables.com/products/. They have the OBD2 plug to loose wires.

Posted at 5:23PM on Nov 7th 2007 by g_man

11. OMG, I was looking for something like this two weeks ago. I guess I did not look hard enough. Oh well, the $200 OBD2 scanner I got was still cheaper then a $400 repair bill at the service station.

Posted at 5:34PM on Nov 7th 2007 by Amos

12. I would be curious if something like this could be used on a Ducati motorcycle. I have been meaning to figure out what type of interface it uses. The one I found for sale was very very expensive.

Posted at 5:50PM on Nov 7th 2007 by Cliff

13. maybe I missed it but is there source code for the PIC firmware? I've been debating making something like this for a while... specifically something to work with my 1995 Nissan 240sx... I know lots of people in my local car club that would love to have one of these I'd love to whip up a batch to sell to the other members at cost since these things are usually so expensive.

Another benefit to having the source is you could wire up a character LCD and a few buttons to make yourself a built in diagnostics tool.

I've got no use for OBDII stuff. Only my truck is new enough to have it but I couldn't care less about running diagnostics on that.

Posted at 6:32PM on Nov 7th 2007 by twistedsymphony

14. I just can't image the costing of the product. He
is willing to charge so little :O I take my hats off
for his willingness :) I haven't try it yet but looks
promising. BTW he is a WxWidget user :D

Posted at 6:35PM on Nov 7th 2007 by john

15. The text and the schem say he uses a MC33290 IC for com with the OCD bus. yet the board dosent show any 8 pin DIP on it. unless its SMD on the reverse side. im confused. ill look at the gerber later.

Posted at 6:52PM on Nov 7th 2007 by Chupa

16. Obd2 connectors and cables can easily be had from:

http://www.obd2cables.com/products/

Posted at 6:52PM on Nov 7th 2007 by Norms

17. @ chupa

they are surface mount on the bottom layer. look to the right of the 4 FETs, you will see them right next to each other.

Posted at 7:40PM on Nov 7th 2007 by jake

18. Nice! Wonder where your car's OBD2 port is? See this database for finding all vehicle models OBD2 port locations, which pictures. http://www.fixexpert.com/wiki/OBD-2+Location

Posted at 8:53PM on Nov 7th 2007 by FixExpert Repair Blogs

19. Very nice. I was going to build one of my own around the chips found here:

http://elmelectronics.com/

but this solutions looks to be a little less expensive.

Posted at 10:05PM on Nov 7th 2007 by tony

20. I think some of you are misunderstanding.

All that this device does is converts from one transport protocol to another (basically, rs232 to usb).

You still need the software on the PC to be able to access the diagnostic system of the car.

It would be a much, much, larger project if you tried to make it a standalone reader. Don't get me wrong, it can be done, and would be a fun project, but this particular one isn't it, but is a good start if thats what you're looking for. And I'm not trying to bash the project either, it is very cool, but some people have a misconception.

Posted at 10:40PM on Nov 7th 2007 by Nate