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Wiring diagram question for Pitot Heat On indicator light

 
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nuckolls.bob(at)aeroelect
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PostPosted: Thu Feb 17, 2011 7:32 am    Post subject: Wiring diagram question for Pitot Heat On indicator light Reply with quote

At 09:07 AM 2/17/2011, you wrote:


Guys,
I'm using Bob's pitot heat.pdf schematic as the base for a "Pitot
Heat ON" amber LED light on my annunicator / warning light panel.

http://www.aeroelectric.com/PPS/DeIce/Pitot_Heat.pdf

In comparing this schematic to his article titled "Failure Detection
and Annunciation I notice a few differences in the two schematics.
http://www.aeroelectric.com/articles/Failure_Detection_and_Annunciation.pdf

Questions:
1. In pitot_heat.pdf the relay is positioned just before the Pitot
heater load and after the Reed switch sensor, vs in the second
article the relay is positioned BEFORE the Reed switch sensor. Does
it matter?

No
2. The Reed switch current sensor wire layout is different in the two
articles. For example, the LED light wire is after the resistor in
one, -vs- the LED wire is after the Radio Shack 275-232 reed relay in
the second article. Does it matter?

Depends on what you want to display.
Light ON = "Pitot heat powered up and
drawing current" (Page 3)

Light ON = "Pitot heat powered but NOT
drawing current". (Page 4)
Bob . . .


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plevyakh



Joined: 10 Jan 2011
Posts: 39

PostPosted: Thu Feb 17, 2011 7:56 am    Post subject: Re: Wiring diagram question for Pitot Heat On indicator li Reply with quote

Thanks Bob...that helps.

Can you comment on use of the 18AWG fuselink in the Pitot Heat.pdf schematic in place of a 15amp fuse?

Why wouldn't I just use a 15amp fuse at the bus to protect my wire?

Thanks,
Howard


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Howard Plevyak
GlaStar / Cincinnati, Ohio
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plevyakh



Joined: 10 Jan 2011
Posts: 39

PostPosted: Thu Feb 17, 2011 7:59 am    Post subject: Re: Wiring diagram question for Pitot Heat On indicator li Reply with quote

Thanks Bob...that helps.

Can you comment on use of the 18AWG fuselink in the Pitot Heat.pdf schematic in place of a 15amp fuse?

Why wouldn't I just use a 15amp fuse at the bus to protect my wire?

Thanks,
Howard


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