4000ppm to 8000ppm conversion, how to?

Printed From: the12volt.com
Forum Name: Cruise Controls
Forum Discription: Cruise Control Settings, Tach Signal, VSS PPM(Vehicle Speed Signal Pulses Per Mile), Vacuum, Brake, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=58188
Printed Date: May 10, 2025 at 5:52 PM

Topic: 4000ppm to 8000ppm conversion, how to?

Posted By: cable43
Subject: 4000ppm to 8000ppm conversion, how to?
Date Posted: June 22, 2005 at 8:02 AM

is their a way to use a combination of resistors and capacitors to boost a 4000ppm VSS signal to a 8000ppm signal?

Basic story:
I have a speed activated unit that is looking for a 8000ppm vss signal.
My car only puts out 4000ppm.

I believe the unit will activate if I go twice as fast (i.e. if it will activate at 25mph I need to go 50mph but i would like to boost the signal if i can.
I know there is a way i just need a formula or an good example.

is any of his making sense to anyone????

is there anyone with some experience that can help???

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Replies:

Posted By: warmshed
Date Posted: July 01, 2005 at 12:18 PM

You wont easily convert a 4000 PPM to 8000 PPM but most cruise controls will have adjustment to cater for the lower PPM, check out the installation book. Audiovox is adjusted by the little switches inside the controlcard on the end of the servo unit. What make is the unit you are trying to use? Dave.

Posted By: cable43
Date Posted: July 01, 2005 at 5:48 PM

this is for a custom application (not ac CC)

i have found a solution- well i still need to build it but it may work.

thanks

Cable

***** here's what i need to make

Posted By: Cav3Kim
Date Posted: August 15, 2005 at 5:51 PM

Hi Cable, what solution did you find for this?
I'm going to try and do something similar,
thanks
Richard

Posted By: cable43
Date Posted: August 16, 2005 at 5:51 AM

here is what I came up with:
posted_image

here is is after it was just about done:
posted_image

I have yet to see if it works but it is a simple clock doubler.