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Old April 30th, 2010, 03:56 PM
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Julien Dalbin
05 Tdi 90
Join Date: Mar 2005
Location: Dominican Republic
Posts: 1,888
Adding leds for engine infos

I'm adding a couple of leds to get a little extra
infos on engine and cooling, which is not a luxury
in this very hot weather.
I have a blue led that goes on when the a/c
compressor clutch trigger and a green one when
the a/c condenser fan goes on.
Both are quite easy to wire, using the relays
of both system.
I want to add a red or amber one and have
it working with the a/c thermoswitch.
The thing is that particular thermoswitch will
cut the flow of current after passing i think
106 C. So i need to light a bulb when current
is off ...
I was told about a PNP diode or something like
Anyone familiar with electronics ?
" Eventually everything connects - people, ideas, objects. The quality of the connections is the key to quality per se. "
- Charles Eames
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