temp gauge internals
Huw Powell
audi at mediaone.net
Sat Jun 30 16:32:33 EDT 2001
Konstantin Bogach wrote:
>
> Hi listers.
>
> I decided to forward back to the list the message I sent ealier under
> different subject because I suspect that many people found that thread
> not interesting and could just skip it.
>
> The reason I do that is I realy very curious how the gauge works. I
> would appreciate if someone comment on it.
if it's liek the ones I am familiar with it is very simple. there is a
voltage regulator to runt he coolant temp and fuel gauges, it produces
10v so these two gauges don't fluctuate with electricla load.
the 10v flows through a coil in a magnetic field attached to the needle
(D'Arsonval movement?), thru the wiring, and then thru the "sender",
which is a variale resistance type device and is grounded, which is
where the current winds up. needle defelection varies proportionatley
with sender resistance.
--
Huw Powell
http://www.humanspeakers.com/audi/
http://www.humanthoughts.org/
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