I made my own cable with the schematic that was posted. It worked on both my 95 Camaro and my 94 Chevy pickup. I eventually bought a USB one from AKM so I could use my newer laptop, but the serial one that I made worked great!

 

Staring at it for a while I think I missed the capacitor on the ground post of the 7805. Ya think that did it?

And I'm not sure about the polarity of my capacitors. I can't figure it out to save my life. Got any pics of your homemade cable?

 

I didn't use the MAX chip, I built my cable from the simple schematic that was posted. There weren't any capacitors for that design, just a few resistors, transistors, and a diode. Are we talking about the same cable?

 

I built the MAX cable. I heard the simple one wont work for a 95 Z28. If it will, I'd be way happy, because I've got the parts to build it. But I really don't think it will. What car is yours?

 

can someone do a writeup of the cable for an OBD 1? I would love it so much

 

Duno how much of a write up there would be, Schematic lol. It was a total bear to make it *at least for me* and it doesn't work. I love my car to death but I hate that its a 95 lol. Pain in the butt to link up unless ya just buy a spendy cable. I basically found while building the cable, that what they charge for them is worth it

 

My car is a 95. It has the LT1 in it and it has the OBDII connector. I built a cable using the simple ALDL cable schematic that was posted on the first page of this thread. It worked great, but I bought a USB cable from AKM eventually so I could use my newer laptop instead of my old one.

 

Weird, I read all over the place that it will not work for a 95. So that's encouraging to hear.

we're talking about that one right? lol. I've got extra resistors/transistors laying around, I should try this

 

That's the schematic I used. I never heard that this design won't work on the 95s. Maybe other people weren't building their cable properly, or maybe my car is a little different. All I know is it only took a few minutes to make and it worked great. Hopefully you have the same success that I did.

 

wish I knew how to fully read a schematic like that lol

I don't remember what all the things mean. The 10Ks are resistors right?

 

Yeah, 10k Resistors and the other stuff in that pic is NPN Transistor, and Diode


http://library.thinkquest.org/10784/...t_symbols.html


I've got all that left extra cause I got enough stuff from Mouser to Make 2 Cables out of the hard one, but I'm sooooooooooooo relieved the easy one works. Thanks I'll try this as soon as I get a small board from radioshack to build it on


Do you Datalog only or do you also change some stuff? Maybe that's the difference between the MAX232 one and the "simple" one. Eventually I'd like to Change shift points and what not, but for now I just want to datalog

 

What software do you use? I'm using Freescan and built the "simple" Schematic one and I don't see any flaws with my cable... yet it is 0 bytes sent 0 bytes recieved It's on an old 95 Thinkpad so it's directly to Serial, not messin with a USB Adapter yet so ??