PC Boards for ALDL

[Matt S Bower]

Had you looked into a line transiever rather than the transitors.  I
have a part number I can get if you want for the job but haven't looked
up the price to see how it compares to the transistors.  The one I built
from scavenged parts can be fit into a DB9

Matt

"Andrew K. Mattei" wrote:
> 
> >Why not just built your interface independent of the aldl?  If you use just
> the
> >25 pin on both sides (and mark which side goes what way) you could get your
> own
> >aldl connector (like the one from hypertech, Snap-On, etc.) and plug it
> right
> >in.  My guess is that most of those f-body lackeys who are interested in
> this
> >probably already have a connector from the hypertech and they could get by
> with
> >that.  Might save you some $$. (might save me some $$!)
> 
> Err, that's been the plan all along. ;) There's the converter box for the
> ALDL/RS232 level shifting, and then there's the cable. The converter board
> will be inside a DB25 M/F null modem clamshell box, with one side (the
> female side) going to the serial port on the computer, and the other side
> connecting (through a DB25 shell connector) to an ALDL cable, either OBDI or
> OBDII. Thus, the converters will be universal, just pick yer cable. :)
> 
> And as for where the schematic is located, I redrew the original (and
> corrected it last night - someone let me know that my OBDII pinout was
> wrong), you can find it at my fabu ALDL web page (hah!) at
> http://www.mindspring.com/~amattei/aldl.htm - well, not totally fabulous,
> kinda dry, but mildly informative. ;)
> 
> And real low on the fancy HTML stuff... mostly text. ;) That's how I like
> it.
> 
> -Andrew