Subj : Flickering Power LED
To   : Ky Moffet
From : Barry Martin
Date : Tue May 14 2024 07:33:00


Hi Ky!

 > Have a blue power LED which has started to randomly flicker.  Several days
 > ago I noticed it was occasionally dimming rapidly and randomly; past
 > couple of days a definite flicker and lst night and this morning it if
 > off for random times.  The random flickering reminds me of a HDD
 > Activity LED but that one seems to be working normally.
 KM> It sounds like the LED itself is failing.

OK, but odd.  I've never had a LED half-fail like that: an all-or-none 
situation.  Can get them to dim by applying a little too much or a 
little too little voltage.  (For the others reading, I've been an 
electronics hobbyist since Dad taking me there to test tubes because I 
was too young to drive.)


 KM> Had similar with a light bulb that went. For about a year it
 KM> would randomly blink a few times a day. Then it got dim and
 KM> flickery. Replaced bulb, end of problem.

This one probably won't get replaced as part of the front panel assembly
and good luck getting those apartment and better luch reassembling!


 KM> The power LED doesn't monitor anything, it's just on or off when
 KM> the power is.
 
OK right.  Simple circuit is power source, pulldown resistor, on/off 
switch, LED.  More complicated circuit is attached to some mystery 
circuit.


                     ¯                                 ®
                      ¯  BarryMartin3@MyMetronet.NET  ®
                     ¯                                 ®


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