From: Bob Blick <bobblick@outlook.com>
To: Microcontroller discussion list - Public. <piclist@mit.edu>
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Date: Thu, 15 Jul 2021 21:08:56 -0700
Subject: Re: [EE] EL lamps dimming
Thread-Topic: [EE] EL lamps dimming
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Hi Neil,
I believe the brightness is more stable when controlled by current, so a se=
ries resistor is probably better than a voltage divider.
Friendly regards, Bob

________________________________________
From: piclist-bounces@mit.edu <piclist-bounces@mit.edu> on behalf of Neil <=
picdude3@narwani.org>
Sent: Thursday, July 15, 2021 8:14 PM
To: Microcontroller discussion list - Public.
Subject: [EE] EL lamps dimming

Hi all,

I'm helping someone build a flight sim from parts of an older
FAA-certified simulator, and currently working on the EL panels.  I have
2 questions re: dimming:

First, the older panels are much dimmer than the new panels.  The device
is ~9 years old, but as we understand it, it was in storage for most (if
not all) of that time.  Do EL lamps just go dim over time without use?
If not, then maybe the device was used quite a bit, or maybe the quality
of the EL panels have just improved over time.

Second, I need to dim the newer panels to match the older ones.  Can I
do this with a simple voltage divider on the output of the EL inverter?
I have one inverter powering 7 small panels, so I'd have to dim the
output side to the new panels, or maybe get a second inverter and dim
the input of one of the inverters.

Cheers,
-Neil.


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