View Single Post
Old 01-17-2011, 03:51 PM   #14 (permalink)
jackbauer
Master EcoModder
 
jackbauer's Avatar
 
Join Date: Sep 2009
Location: Ireland
Posts: 734
Thanks: 26
Thanked 304 Times in 171 Posts
My 4D systems display turned up today. word of advice. Buy the usb programmer! Had an epic struggle to get the device working on rs232. The culprit is the reset line. For programming it must be pulled low briefly. I eventually found a little obscure circuit on the 4d forums and modified it slightly to avoid using the max232 for the the reset signal. A 1N4001 diode works fine as shown. Now i can get on with programming the thing
Attached Thumbnails
Click image for larger version

Name:	1.jpg
Views:	69
Size:	107.3 KB
ID:	7653   Click image for larger version

Name:	2.jpg
Views:	81
Size:	107.1 KB
ID:	7654   Click image for larger version

Name:	RS232_to_TTL.jpg
Views:	75
Size:	42.9 KB
ID:	7655  
__________________
Now, Cole, when you shift the gear and that little needle on the ammeter goes into the red and reads 2000 Amps, that's bad.
www.evbmw.com
  Reply With Quote