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nuckolls.bob(at)aeroelect
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 Posted: Tue Nov 12, 2019 8:15 am Post subject: LEDs light mystery (Option 2) |
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At 12:14 PM 11/10/2019, you wrote:
| Quote: | On 11/10/2019 11:44 AM, Carlos Trigo wrote:
| Quote: | Charlie
A DPDT would not suit my need, it has to be a DPST.
And I am not finding a DPST - N.O., which one is it?
Carlos |
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Option 2. See
http://www.aeroelectric.com/PPS/Lighting/Baggage%20Door%20Lite.pdf
This configuration eliminates the 'dim led'
condition while satisfying the EFIS input
requirement using a single switch.
For general rundown on switch nomenclature
and schematic symbols, see chapter 11 in:
http://www.aeroelectric.com/Book/AEC_R12A.pdf
Bob . . .
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trigo(at)mail.telepac.pt
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| Posted: Wed Nov 13, 2019 10:09 am Post subject: LEDs light mystery (Option 2) |
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Thanks to all who have responded.
Today I had the time to address the problem at the airplane.
The easiest way (and costless - apart from my $worktime$) to solve it was to leave the ground circuit which goes to the EFIS annunciator in the N.O. tab of the microswitch and change the EFIS configuration to “Active High” (no need for the pull-up resistor), and connect the ground wire from the LED lights to the N.C. tab of the same microswitch (SPST).
This way, when the baggage door is Open, the LEDs lights are fully lit and the alarm “Baggage door open” appears in the GARMIN monitors, and when the baggage door is closed, the EFIS annunciator doesn’t show and the LED lights are fully Off.
Yeay!!
Another problem solved!
Thanks
Carlos
P.S. - just out of curiosity, after I disconnected the terminal of the ground lead of the LED lights, and before reconnecting it to the other tab, the LEDs showed a very low dim light whenever I touched any metal part of the airframe with my fingers just holding the connector 😳.
These LEDs are really sensitive, they do emit light even with the tiny current which was flowing through my body...
| Quote: | No dia 12/11/2019, às 16:23, Robert L. Nuckolls, III <nuckolls.bob(at)aeroelectric.com> escreveu:
At 12:14 PM 11/10/2019, you wrote:
| Quote: | On 11/10/2019 11:44 AM, Carlos Trigo wrote:
| Quote: | CharlieÂ
A DPDT would not suit my need, it has to be a DPST.
And I am not finding a DPST - N.O., which one is it?
Carlos |
|
Option 2. See
http://www.aeroelectric.com/PPS/Lighting/Baggage%20Door%20Lite.pdf
This configuration eliminates the 'dim led'
condition while satisfying the EFIS input
requirement using a single switch.
For general rundown on switch nomenclature
and schematic symbols, see chapter 11 in:
http://www.aeroelectric.com/Book/AEC_R12A.pdf
Bob . . .
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