---------------------------------------------------------- AeroElectric-List Digest Archive --- Total Messages Posted Mon 04/21/14: 2 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 05:11 AM - Half failed LEDs (rayj) 2. 12:38 PM - warning lights for engine T&Ps (Sacha) ________________________________ Message 1 _____________________________________ Time: 05:11:02 AM PST US From: rayj Subject: AeroElectric-List: 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 _____________________________________ Time: 12:38:31 PM PST US From: "Sacha" Subject: AeroElectric-List: 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 ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message aeroelectric-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/AeroElectric-List.htm Web Forum Interface To Lists http://forums.matronics.com Matronics List Wiki http://wiki.matronics.com Full Archive Search Engine http://www.matronics.com/search 7-Day List Browse http://www.matronics.com/browse/aeroelectric-list Browse Digests http://www.matronics.com/digest/aeroelectric-list Browse Other Lists http://www.matronics.com/browse Live Online Chat! http://www.matronics.com/chat Archive Downloading http://www.matronics.com/archives Photo Share http://www.matronics.com/photoshare Other Email Lists http://www.matronics.com/emaillists Contributions http://www.matronics.com/contribution ------------------------------------------------------------------------------------- These Email List Services are sponsored solely by Matronics and through the generous Contributions of its members.