From: Clint Jay <cjaysharp@gmail.com>
To: Microcontroller discussion list - Public. <piclist@mit.edu>
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Date: Sat, 17 Jul 2021 02:40:24 -0700
Subject: Re: [EE] EL lamps dimming
Thread-Topic: [EE] EL lamps dimming
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Hi Neil,  they do age in use, I'm not sure if they age in storage but
moisture absorption used to be a problem.

On Fri, 16 Jul 2021, 05:10 Bob Blick, <bobblick@outlook.com> wrote:

> Hi Neil,
> I believe the brightness is more stable when controlled by current, so a
> series 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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