Today's Message Index:
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1. 05:11 AM - Half failed LEDs (rayj)
2. 12:38 PM - warning lights for engine T&Ps (Sacha)
Message 1
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| Subject: | Half failed LEDs |
I just removed about 8 blue LEDs from a string of lights that no longer
emitted light, but still have continuity. If any one wants them to
investigate, I'll mail them out.
--
Raymond Julian
Kettle River, MN
The things we admire in men, kindness and generosity, openness, honesty,
understanding and feeling are the concomitants of failure in our system.
And those traits we detest, sharpness, greed, acquisitiveness, meanness,
egotism and self-interest are the traits of success. And while men
admire the quality of the first they love the produce of the second.
-John Steinbeck, novelist, Nobel laureate (1902-1968)
Message 2
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| Subject: | warning lights for engine T&Ps |
Aero-Electrics,
Is there an easy/robust way of incorporating "idiot" warning lights for the
engine T&Ps? When I first designed the panel I had in mind tri-colour LEDs
which would turn blue if a value was below normal, green if in the normal
range and red if above the normal range (e.g. for CHT temps or fuel
pressure).
I experimented with this circuit
https://www.spiyda.com/magento/index.php/three-colour-warning-light.html
which I used to measure the various senders resistances
but was not able to reliably calibrate the readings to get anything useful.
I am determined to do some bench tests to see whether I can make things work
better by incorporating a 12V voltage regulator upstream of the circuit to
get more repeatable readings. Before I embark on this though I thought I'd
check if there is already an established way of doing this?
Sacha
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