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        General >> Problems >> Electrickery - VSS signal understand required
        
(Message started by: hoylegj on May 7^th, 2016, 1:29pm)

Title: Electrickery - VSS signal understand required
Post by hoylegj on May 7^th, 2016, 1:29pm

Hi,

I have a 98 24V Scorpio and trying to understand the VSS signal. My understanding so far is that is a square wave, 2.2hz per MPH per Sec, but I can't find the min-peak voltage. I've seen two outputs discussed, 0-5v and 0-14v, that's a fair difference :-)

Would any one please know. I'm trying to design a bit of circuit to attach to it.

Many thanks

Title: Re: Electrickery - VSS signal understand required
Post by Snoopy on May 8^th, 2016, 8:40am

Try searching on the MAIN web pages for " Lock on Go" I seem to remember an article describing the signals you mention.

Title: Re: Electrickery - VSS signal understand required
Post by scorpio_man on May 8^th, 2016, 11:30am

Hi there

It's in this section.

http://www.fordscorpio.co.uk/modindex.htm

Hth

Title: Re: Electrickery - VSS signal understand required
Post by ADroste on May 8^th, 2016, 1:00pm

on 05/07/16 at 13:29:14, hoylegj wrote:

... two outputs discussed, 0-5v and 0-14v, that's a fair difference :-)...

But actually it is not really a problem for rectangular signals. For car electronics in any case you need to add a limitation input stage for protection purpose. (positive and negative)

If you need the higher voltage, just add a transistor inverter stage.

Regards
Armin