---------------------------------------------------------- AeroElectric-List Digest Archive --- Total Messages Posted Tue 11/12/19: 3 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 07:20 AM - Re: LEDs light mystery (Charlie England) 2. 07:52 AM - Re: LEDs light mystery (Kent or Jackie Ashton) 3. 08:15 AM - LEDs light mystery (Option 2) (Robert L. Nuckolls, III) ________________________________ Message 1 _____________________________________ Time: 07:20:09 AM PST US From: Charlie England Subject: Re: AeroElectric-List: LEDs light mystery On Sun, Nov 10, 2019 at 11:53 AM Carlos Trigo wrote: > 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 > > > Carlos, I thought about my previous answer ('a DPDT is a DPST if you ignore 2 terminals') and realized that it might not have made sense if you don't have an electrical circuits background with the switches. It's a true statement, but might need more explanation. A DPST switch controls 2 circuits, and either opens or closes both at the same time, as you know. A DPDT can do the same task. The 'DT' just means that the 'common' terminal will be connected to (for example) terminal one, or terminal two, depending on the position of the switch. Take a look at the tutorial below, and scroll down to the DPDT description. If you make your connections from the EFIS to '1P' and the LED to '2P', and connect both the '1T' terminals to ground, leaving both '2T' terminals with no connection, the switch functions as a DPST switch. Hope that helps, Charlie https://learn.sparkfun.com/tutorials/switch-basics/all ________________________________ Message 2 _____________________________________ Time: 07:52:45 AM PST US From: Kent or Jackie Ashton Subject: Re: AeroElectric-List: LEDs light mystery Google images for "switch dpst" https://www.google.com/imghp?hl=en&tab=wi&ogbl > On Nov 12, 2019, at 10:16 AM, Charlie England wrote: > > > > On Sun, Nov 10, 2019 at 11:53 AM Carlos Trigo wrote: > 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 > >> > Carlos, > I thought about my previous answer ('a DPDT is a DPST if you ignore 2 terminals') and realized that it might not have made sense if you don't have an electrical circuits background with the switches. It's a true statement, but might need more explanation. > A DPST switch controls 2 circuits, and either opens or closes both at the same time, as you know. > > A DPDT can do the same task. The 'DT' just means that the 'common' terminal will be connected to (for example) terminal one, or terminal two, depending on the position of the switch. Take a look at the tutorial below, and scroll down to the DPDT description. If you make your connections from the EFIS to '1P' and the LED to '2P', and connect both the '1T' terminals to ground, leaving both '2T' terminals with no connection, the switch functions as a DPST switch. > > Hope that helps, > > Charlie > > https://learn.sparkfun.com/tutorials/switch-basics/all ________________________________ Message 3 _____________________________________ Time: 08:15:17 AM PST US From: "Robert L. Nuckolls, III" Subject: AeroElectric-List: LEDs light mystery (Option 2) At 12:14 PM 11/10/2019, you wrote: >On 11/10/2019 11:44 AM, Carlos Trigo wrote: >>Charlie=C2 >> >>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 . . . ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message aeroelectric-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/AeroElectric-List.htm Web Forum Interface To Lists http://forums.matronics.com Matronics List Wiki http://wiki.matronics.com Full Archive Search Engine http://www.matronics.com/search 7-Day List Browse http://www.matronics.com/browse/aeroelectric-list Browse Digests http://www.matronics.com/digest/aeroelectric-list Browse Other Lists http://www.matronics.com/browse Live Online Chat! http://www.matronics.com/chat Archive Downloading http://www.matronics.com/archives Photo Share http://www.matronics.com/photoshare Other Email Lists http://www.matronics.com/emaillists Contributions http://www.matronics.com/contribution ------------------------------------------------------------------------------------- These Email List Services are sponsored solely by Matronics and through the generous Contributions of its members.