Rick, I went 510 ohm (not k) 1/4 W to be on the safe side. It's a 6000 mcd high
intensity white LED. Normal green ones are nowhere near bright enough. Though
I believe you can get some high intensity ones now. I used it on my new
combined oil pressure/temp gauge. It came without any coloured filter to make
the light green and was extremely dim with the standard 2w so I tried 4w and it
was OK (for light intensity) but far too hot for the plastic filter I made from
office index file tabs ( just about the right shade of green, cheap and
available). I stuck my LED torch (flashlight I believe you call it) round the
back and that looked not bad, hence why I went this way.
LED is 3.6v, 20 mA nominal so I thought - lights are only on when the engine is
running - so it's at the charging voltage, hence I want to drop about 10V -
11V -> 500 ohm- 550 ohm. 11v, 20mA ->220 mw hence the 1/4W rating and it's also
small enough to fit inside the old bulb base. It cames out pretty neat for a
first try.
I was asking about the valve cleaner, since like you am am worried about the
side-effects.
Alan
-----Original Message-----
From: "spitfires-owner@autox.team.net" <spitfires-owner@autox.team.net> on
behalf of "Rick Gregory" <Rick@ncmg.com>
Sent: Fri, 9 Aug 2002 11:13:20 -0600
To: "'ralemen@cableone.net'" <ralemen@cableone.net>,
"'spitfires@autox.team.net'" <spitfires@autox.team.net>
Subject: RE: Where did everyone go ?
Is that a standard LED & 470(K?) ohm resistor, or did you use something
else? What did you use it for - an "on" indicator or something else? I have
been thinking it would be nice to have a pair of these for left & right turn
signal indicators, & maybe use the existing one for something else, or not
at all.
Never used the valve cleaner products - always been to scared to mess with
things like that for fear of bad side-effects. I would love to hear of an
objective review and ratings of these kinds of products from serious and
thorough evaluations.
Rick Gregory
'74 Spitfire FM15447UO
Great Falls, Montana
http://ww.spitfire.gregory.net
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