voltage as a function of speed
#1
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voltage as a function of speed
I am trying to find a source for a voltage output that is a function of speed. I would like to wire up a speed sensitive volume control for the stereo in the truck. In order to do this i need a voltage source that will increase as speed increases. My first thought i that most likely their should be some variable volatge output running the speedometer. If anyone know for sure or knows either what that voltage is or of another voltage source that is dependant on speed i would very much appreciate it.
Thanks,
Dan
Thanks,
Dan
#2
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It appears wiring diagrams for '04 can still be had on DC Bodybuilder site .
That's where I'd start.
HTH
Tony
That's where I'd start.
HTH
Tony
#7
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Originally Posted by Jeff in TD
The vehicle gets it's speed reading from a hall effect sensor mounted on the rear dif housing, so that wouldn't be the varying voltage you are looking for.
I believe it is a PM generator that does deliver a variable A/C voltage.
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windmill it is...
Thanks for all the replies. Ill check the above link and see if I can find anything for a voltage source there.
Ill post an update if i find anything
Thanks for all the replies. Ill check the above link and see if I can find anything for a voltage source there.
Ill post an update if i find anything
#11
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I think it's a super-neat idea, and let us know if you figure something out.
The Impala I drive at work has speed sensitive volume that can be set to off, high, or low. I'd guess the powertrain module gives the stereo some kind of signal?
The Impala I drive at work has speed sensitive volume that can be set to off, high, or low. I'd guess the powertrain module gives the stereo some kind of signal?
#12
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From what I recall a speedometer works on the frequency that it is receiving. This is usually picked up from a hall effect pickup either in the transmission or somewhere on the driveline. This is really only varying the frequency and not the voltage to the speedometer. I don't know if you could use a type of pitot tube for an airplane or not. These usually have a plunger in them that moves forward or backwards depending on the amount of air pressure (speed) in front of the plunger. This would be a variable source, but I don't know if it would work for your particular application.
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well pin 27 on the c2 connector is the vehicle speed sensor, and i have a couple of other possibilities as well. If i can fid my multi meter ill go for a drive and see what i can find.
thanks for all the replies so far as well.
thanks for all the replies so far as well.
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