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Re: Charge Indicating Lamp

Subject: Re: Charge Indicating Lamp
From: Martin J.Tuck <102034.2747@compuserve.com>
Date: Thu, 4 Feb 1999 20:07:32
Re: Charge Indicating Lamp

>The 12V LED I use is about 0.4 inch diameter so seems pretty 'meaty' by
LED standards but is not rated with any sort of wattage.

Is it a high intensity type? Where did you get it?

If it's the fat, clear plastic high intensity device from  radio shack,
that critter can easily take 60 milliamps  and the light output will fry
your retenas . . . a very attention getting device.>

It is! How did you know? I guess you're saying its OK to use - but I
apparently have to fit a 680 ohm (thanks Tony) resistor (presumably in the
+VE side). Fortunately I usually wear sunglasses when flying!

Does the fact that its working for the 'starter engaged' warning mean that
it has a built in limiter so perhaps I don't need the resistor after all?

My Mitchell oil pressure sender arrived today but my instrument still reads
100 psi (max) when I turn power on. Is the circuit expecting a single wire
---From sender to instrument 'cos I have a plug in the middle so that my
modular panel will easily go in and out (for which I am getting plenty of
practice).

Thinking that somehow resistance is being used to transmit the oil pressure
via the sender I wonder if the plug is influencing the reading?

Thoughts anyone?

Regards

Martin Tuck
N152MT
Wichita, Kansas


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