DIY Traction Control

md4etal md4etal at netzero.net
Tue Apr 2 08:42:24 GMT 2002


Dickey John corp makes one that is good to about 50 mph.  The company I work
for is pre production engineering one good to 100 mph.   Any old police
radar unit will work.  ebay has many, but you want the lower frequency
versions.  Police radars in the 24.125 GHz band are legal for us normal
people to use without a license because that is where the automatic door
opener systems work at.  Say if you are handy with electronics, find an old
radar based door opener and just take off the signal with an opamp.

Mike Dekutoski

----- Original Message -----
From: " Brian Michalk" <michalk at awpi.com>
To: <diy_efi at diy-efi.org>
Sent: Monday, March 25, 2002 9:24 AM
Subject: RE: DIY Traction Control


> Where do you get a doppler effect ground speed radar?
>
> > -----Original Message-----
> > From: owner-diy_efi at diy-efi.org [mailto:owner-diy_efi at diy-efi.org]On
> > Behalf Of Brian Dessent
> > Sent: Thursday, March 14, 2002 2:54 PM
> > To: diy_efi at diy-efi.org
> > Subject: Re: DIY Traction Control
> >
> >
> > Axel Rietschin wrote:
> >
> > > PS: I'm looking for a device having four wheel speed inputs and
> > one output.
> > > I'd like to be able to choose what I want as output, for example the
avg
> > > wheel speed, fastest wheel, slowest wheel, or the median speed,
> > ignoring the
> > > fastest and slowest and averaging the remaining two. The idea
> > is to do 4wd
> > > traction control with a 2wd TC system, using the output of this
> > device as
> > > "driven" wheel speed and a non-contact speed sensor (a Doppler
> > effect ground
> > > speed radar) as "undriven" wheel speed.
> > >
> > > Any idea?
> >
> > National's LM2907 can do select-low, select-high, and select-average of
> > two wheel speed inputs.  See page 16 of the datasheet for sample
> > circuits.
> >
> > http://www.national.com/ds/LM/LM2907.pdf
> >
> > Brian
> >
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