From: Neil <picdude3@narwani.org>
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Date: Wed, 21 Jul 2021 20:44:03 -0700
Subject: Re: [EE] EL lamps dimming
Thread-Topic: [EE] EL lamps dimming
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Hmmm... hadn't thought of things like moisture.
Sadly, the only fix is a pricey replacement.



On 7/17/2021 5:40 AM, Clint Jay wrote:
> 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 Nei=
l
>> <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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