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echristley(at)nc.rr.com
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 Posted: Thu Aug 30, 2007 6:23 pm Post subject: Icom A-200 dimming |
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I've read through the archives, but can't find a "Yes/No" answer to this
question, though I think I've come close.
I'm choosing to light my panel and cabin with LEDs that all pass through
a pulse-width modulator for dimming. I'd like to hook the Icom's
display into the same circuit, but a posting to this list on 2/13/06
indicates that only the positive side of the lighting circuit is exposed
to through the connector.
My first question is, "Is this correct? There's no easy access to the
lighting circuit's ground lead?"
(I could put the PWM at the head end of the circuit, but I have some
lighted switches that aren't amenable to this.)
The second question, "Is a dimmer necessary?" My Icom will be situated
on a side panel, situated about 75 degrees from front-center (a delta
configuration has it's benefits). Is the light level low enough to not
be a bother?
--
"Life is not a journey to the grave with the intention of arriving safely in
a pretty and well preserved body, but rather to skid in broadside,
thoroughly used up, totally worn out, with chocolate in one hand and wine in
the other, loudly proclaiming 'WOO HOO What a Ride!'"
--Unknown
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klehman(at)albedo.net
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| Posted: Thu Aug 30, 2007 7:47 pm Post subject: Icom A-200 dimming |
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My A-200 has incandescent bulbs with no easy access to the ground as I
recall. Think the draw was on order of 60 or 90 ma. I have a two
position switch to dim them through a resistor but suspect a dimmer is
not really required.
Ken
Ernest Christley wrote:
| Quote: |
<echristley(at)nc.rr.com>
I've read through the archives, but can't find a "Yes/No" answer to
this question, though I think I've come close.
I'm choosing to light my panel and cabin with LEDs that all pass
through a pulse-width modulator for dimming. I'd like to hook the
Icom's display into the same circuit, but a posting to this list on
2/13/06 indicates that only the positive side of the lighting circuit
is exposed to through the connector.
My first question is, "Is this correct? There's no easy access to the
lighting circuit's ground lead?"
(I could put the PWM at the head end of the circuit, but I have some
lighted switches that aren't amenable to this.)
The second question, "Is a dimmer necessary?" My Icom will be
situated on a side panel, situated about 75 degrees from front-center
(a delta configuration has it's benefits). Is the light level low
enough to not be a bother?
|
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gmcjetpilot
Joined: 04 Nov 2006
Posts: 170
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| Posted: Fri Aug 31, 2007 1:29 am Post subject: Icom A-200 dimming |
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Ernest from the installation manual:
Pin "B" is +14v for light
Pin "1" is GROUND for pin "B"
This may what you want. Do some bench test.
It sounds like a discrete ground for the light!
Dimming is nice but you don't know until you
fly at night with it. I fly a bubble canopy (RV) and it
can reflect light. Sounds like you PWM will work
off the ligt ground on PIN 1.
Good Luck George
>From: Ernest Christley <echristley(at)nc.rr.com (echristley(at)nc.rr.com)>
| Quote: | Subject: Icom A-200 dimming
posting to this list on 2/13/06 indicates that only the positive
side of the lighting circuit is exposed to through the connector.
My first question is, "Is this correct?
There's no easy access to the lighting circuit's ground lead?"
The second question, "Is a dimmer necessary?"
|
[quote][b]
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