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nuckolls.bob(at)aeroelect
Guest

Posted: Sun Mar 09, 2014 9:00 am Post subject: Timer circuit for led array

At 11:30 AM 2/8/2014, you wrote:

 	  Quote: 	
		  Apologies for not properly defining the issue ....the unit consists 

of four superbright LEds in a unit and is 12 v ready. So i want to 

take more than one of these units and create a flashing beacon light.


	


   Okay, we're mulling over the options for producing

   a white flashing beacon not unlike those sold as

   strobes. This brings to mind an array of lamps

   that is flashed about 60-90 times a minute

   with a duty-cycle on the order of 10%. The

   cool thing about the short duty cycle is that

   you can drive the lamps with greater than

   their continuous rated current without overheating

   them. This lets you get brighter flashes than

   might otherwise be secured with simple

   on/off flasher circuits.



   Doing the flasher for controlling 12v to the

   lamps is pretty simple. The venerable 555 timer

   has been incorporated into dozens of light

   flashing circuits over its 50+ market life.



http://tinyurl.com/28tdjz



   At the same time, you might want to consider

   removing any resistors in the light assemblies

   and driving them with a constant current power

   supply specifically tailored to LED driving.



   Sorry, there's not a satisfying 'short answer'

   to your question. To confine a response to simply

   flashing the off the shelf fixtures you're

   working with would produce an outcome that's

   far short of the best we know how to do.



   Bob . . .

Eric M. Jones

Joined: 10 Jan 2006
Posts: 565
Location: Massachusetts

Posted: Mon Mar 10, 2014 7:29 am Post subject: Re: Timer circuit for led array

Some years ago I published the attached regarding the use of LEDs for beacons. I was gratified to know it was pretty much right on because Whelen called me to make a minor correction. They said their engineers love it and use it. It is a companion piece to the LED article also attached which was written for Kitplanes...but remains unpublished.



It is easy to make bad LED lighting, and there's a lot of it on the market. Be careful. Some day the FAA might introduce a ramp-check lighting standard. This will happen after a well-publicized accident caused by homemade LED lighting.



Now, on timer circuits: (the pertains to Wig-wags, but the same would apply to single pulse units) The difficult problem with using a 555 timer is figuring out how to avoid the 150% first pulse. (I.e. the first pulse is 1-1/2 times as long as the remaining pulses.) I know a couple ways to do this but finally decided the easy way was to ditch the 555 and use a CD4060 14-stage binary ripple counter. The 150% first pulse problem is still there but it is now divided by 256...so it is not noticeable. Various pulse times are just a matter of switching resistors. The circuit is the size of a postage stamp and needs no heat sink.



I have sold these in single pulse units for beacons and single landing light aircraft with the output timing 375 ms ON/OFF.



I am still working on a system for my own airplane that would consist of  half-a-dozen or more synced LEDs instead of a beacon sticking into the breeze. I think this is FAA legal  (Bob?). The FAA historically loves red beacons, although white strobes are common, big red LEDs make a heck of a beacon.

Wig-Wag D6d Schematic.pdf

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LED_Lighting_ Article Draft 13May08..pdf

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_________________
Eric M. Jones
www.PerihelionDesign.com
113 Brentwood Drive
Southbridge, MA 01550
(508) 764-2072
emjones(at)charter.net

nuckolls.bob(at)aeroelect
Guest

Posted: Mon Mar 10, 2014 8:34 am Post subject: Timer circuit for led array

At 10:29 AM 3/10/2014, you wrote:




Some years ago I published the attached regarding the use of LEDs for 

beacons. I was gratified to know it was pretty much right on because 

Whelen called me to make a minor correction. They said their 

engineers love it and use it. It is a companion piece to the LED 

article also attached which was written for Kitplanes...but remains 

unpublished.



    Pretty heavy reading for a Kitplanes subscriber . . . I'm wrestling

    with the 4th installment on batteries with a focus on lithium . . . and

    trying to peel back the layers on the physics onion without getting

    too deep . . .



    If you wish, I'd be pleased to post both articles to aeroelectric.com



It is easy to make bad LED lighting, and there's a lot of it on the 

market. Be careful. Some day the FAA might introduce a ramp-check 

lighting standard. This will happen after a well-publicized accident 

caused by homemade LED lighting.



         Not seeing much risk here . . . the fact that one of the

         airplanes involved had 'unapproved' lighting goes only

         to the sanctity of number published by those-who-know-more-

         about-airplanes-than-we-do and little to do with known

         facts for cause-effect.



         The vast majority of airplanes attempting to occupy

         the same airspace had 'approved' lighting on them. Whether

         the lights were even ON is not generally a provable

         condition. But in some cases, as many as four pilots

         had their heads down . . . no doubt getting an update

         from the moving map . . . or pouring coffee . . . who

         knows?



http://tinyurl.com/k5alncy



         I thought I had the NTSB docs on this incident but

        can't find them now. NTSB monthly index doesn't

         cite it either . . . Hmmmm . . .



         But the idea that putting any kind of requirements

         on lighting characteristics will have a quantifiable

         effect on accident rates is unsupportable.



Now, on timer circuits: (the pertains to Wig-wags, but the same would 

apply to single pulse units) The difficult problem with using a 555 

timer is figuring out how to avoid the 150% first pulse. (I.e. the 

first pulse is 1-1/2 times as long as the remaining pulses.) I know a 

couple ways to do this but finally decided the easy way was to ditch 

the 555 and use a CD4060 14-stage binary ripple counter. The 150% 

first pulse problem is still there but it is now divided by 256...so 

it is not noticeable. Various pulse times are just a matter of 

switching resistors. The circuit is the size of a postage stamp and 

needs no heat sink.



         Yeah, I went the software route . . .



I have sold these in single pulse units for beacons and single 

landing light aircraft with the output timing 375 ms ON/OFF.



I am still working on a system for my own airplane that would consist 

of  half-a-dozen or more synced LEDs instead of a beacon sticking 

into the breeze. I think this is FAA legal  (Bob?).



         You got me my friend . . . I'm not sure most of the

         regulators have the tools and experience to know . . . the

         safe thing to do is fall back on the regs and somebody

         else's approvals that came from some desk in OKC.



  The FAA historically loves red beacons, although white strobes are 

common, big red LEDs make a heck of a beacon.



         You bet . . . long stripes of lighting make for much

         larger viewing angles . . . problem is getting them

         embedded into surfaces that are the most critical to

         flight characteristics . . . the stagnation line along

         leading edges . . . where de-ice systems like to reside.

   Bob . . .

davedup10(at)gmail.com
Guest

Posted: Mon Mar 10, 2014 6:19 pm Post subject: Timer circuit for led array

I'm looking for a timer to shut off my cabin overhead utility light after about 10 minutes of operation. It's fed directly from the main battery buss and I would like to know that if I forgot to turn it off the timer would do it for me before draining the battery. Any ideas?  David Duperron

dapadup(at)chartermi.net (dapadup(at)chartermi.net)



On Mon, Mar 10, 2014 at 11:29 AM, Eric M. Jones <emjones(at)charter.net (emjones(at)charter.net)> wrote:

 [quote]--> AeroElectric-List message posted by: "Eric M. Jones" <emjones(at)charter.net (emjones(at)charter.net)>

  

 Some years ago I published the attached regarding the use of LEDs for beacons. I was gratified to know it was pretty much right on because Whelen called me to make a minor correction. They said their engineers love it and use it. It is a companion piece to the LED article also attached which was written for Kitplanes...but remains unpublished.

  

 It is easy to make bad LED lighting, and there's a lot of it on the market. Be careful. Some day the FAA might introduce a ramp-check lighting standard. This will happen after a well-publicized accident caused by homemade LED lighting.

  

 Now, on timer circuits: (the pertains to Wig-wags, but the same would apply to single pulse units) The difficult problem with using a 555 timer is figuring out how to avoid the 150% first pulse. (I.e. the first pulse is 1-1/2 times as long as the remaining pulses.) I know a couple ways to do this but finally decided the easy way was to ditch the 555 and use a CD4060 14-stage binary ripple counter. The 150% first pulse problem is still there but it is now divided by 256...so it is not noticeable. Various pulse times are just a matter of switching resistors. The circuit is the size of a postage stamp and needs no heat sink.

  

 I have sold these in single pulse units for beacons and single landing light aircraft with the output timing 375 ms ON/OFF.

 

 I am still working on a system for my own airplane that would consist of  half-a-dozen or more synced LEDs instead of a beacon sticking into the breeze. I think this is FAA legal  (Bob?). The FAA historically loves red beacons, although white strobes are common, big red LEDs make a heck of a beacon.

  

 --------

 Eric M. Jones

 www.PerihelionDesign.com

 113 Brentwood Drive

 Southbridge, MA 01550

 [url=tel:%28508%29%20764-2072](508) 764-2072[/url]

 emjones(at)charter.net

 

 

 

 

 Read this topic online here:

 

 http://forums.matronics.com/viewtopic.php?p=420094#420094

 

 

 

 

 Attachments:

 

 http://forums.matronics.com//files/wig_wag_d6d_schematic_121.pdf

 http://forums.matronics.com//files/led_lighting_article_draft_13may08_525.pdf

 http://forums.matronics.com//files/aircraft_beacons_using_leds_307.pdf

 

 

 

 

 ===========

 -List" target="_blank">http://www.matronics.com/Navigator?AeroElectric-List

 ===========

 http://forums.matronics.com

 ===========

 le, List Admin.

 ="_blank">http://www.matronics.com/contribution

 ===========

 

 

 

 [b]

nuckolls.bob(at)aeroelect
Guest

Posted: Tue Mar 11, 2014 2:11 am Post subject: Timer circuit for led array

At 09:18 PM 3/10/2014, you wrote:

 	  Quote: 	
		  I'm looking for a timer to shut off my cabin overhead utility light 

after about 10 minutes of operation. It's fed directly from the main 

battery buss and I would like to know that if I forgot to turn it 

off the timer would do it for me before draining the battery. Any ideas?


	


   Are you wanting to DIY from scratch parts

   or looking for a Plug-n-Play assembly?



   There are dozens of ways to implement this

   on-limit function. I have a micro-controller

   that is configured to offer this functionality

   but you have to wrap a few goodies around

   it. It will eventually find its way into

   a PnP product but for now, it's just the chip.

   Bob . . .

bob.verwey(at)gmail.com
Guest

Posted: Tue Mar 11, 2014 3:00 am Post subject: Timer circuit for led array

Thanks for the responses.

I bumped into a "heat seeker" in the electronics store who was playing around with LED light sequencing. When I aired my concept, he was only to happy to have me test his "oscillator circuit" as he called it. "12 V ready" to boot.

  



So I hooked it up and tested it, and found the time interval is dependent on the no of LED bars, and was very noisy on the radio. I then added the fat cap which silences the unit completely on audio. Probably overkill on the Cap.

  



Apparently it is easy to add sequencing and variable on off durations....might just try that out for a wig wag type setup.

A little video of the unit at work.

  http://www.youtube.com/watch?v=51IfTgY_GTg



Best...  

Bob Verwey



 



On 9 March 2014 18:59, Robert L. Nuckolls, III <nuckolls.bob(at)aeroelectric.com (nuckolls.bob(at)aeroelectric.com)> wrote:

[quote]  --> AeroElectric-List message posted by: "Robert L. Nuckolls, III" <nuckolls.bob(at)aeroelectric.com (nuckolls.bob(at)aeroelectric.com)>

 

 At 11:30 AM 2/8/2014, you wrote:

  	  Quote: 	
		   Apologies for not properly defining the issue ....the unit consists of four superbright LEds in a unit and is 12 v ready. So i want to take more than one of these units and create a flashing beacon light.

 	
 

   Okay, we're mulling over the options for producing

   a white flashing beacon not unlike those sold as

   strobes. This brings to mind an array of lamps

   that is flashed about 60-90 times a minute

   with a duty-cycle on the order of 10%. The

   cool thing about the short duty cycle is that

   you can drive the lamps with greater than

   their continuous rated current without overheating

   them. This lets you get brighter flashes than

   might otherwise be secured with simple

   on/off flasher circuits.

 

   Doing the flasher for controlling 12v to the

   lamps is pretty simple. The venerable 555 timer

   has been incorporated into dozens of light

   flashing circuits over its 50+ market life.

 

 http://tinyurl.com/28tdjz

 

   At the same time, you might want to consider

   removing any resistors in the light assemblies

   and driving them with a constant current power

   supply specifically tailored to LED driving.

 

   Sorry, there's not a satisfying 'short answer'

   to your question. To confine a response to simply

   flashing the off the shelf fixtures you're

   working with would produce an outcome that's

   far short of the best we know how to do.

 

 

 

   Bob . . .  

 

 ====================================

 -List" target="_blank">http://www.matronics.com/Navigator?AeroElectric-List

 ====================================

 http://forums.matronics.com

 ====================================

 le, List Admin.

 ="_blank">http://www.matronics.com/contribution

 ====================================

 

 

 

 [b]

nuckolls.bob(at)aeroelect
Guest

Posted: Tue Mar 11, 2014 6:41 am Post subject: Timer circuit for led array

At 05:59 AM 3/11/2014, you wrote:

 Thanks for the responses.



 I bumped into a "heat seeker" in the electronics store who was playing around with LED light sequencing. When I aired my concept, he was only to happy to have me test his "oscillator circuit" as he called it. "12 V ready" to boot.



 So I hooked it up and tested it, and found the time interval is dependent on the no of LED bars, 



 

    Hmmmm . . . normally, one expects behavior of

    'controls' to be independent of the nature

    of 'loads' . . . 



 and was very noisy on the radio.



 

    What was the nature of radio noise? Can you 

    share the schematic under discussion?



  I then added the fat cap which silences the unit completely on audio. Probably overkill on the Cap.



    . . . again, a schematic would contribute greatly

    to crafting a common image amongst the readers.



 

 Apparently it is easy to add sequencing and variable on off durations....might just try that out for a wig wag type setup.



 

   I wasn't sure if you were setting out to craft

   a beacon or wig-wag system. Beacons tend to be

   high intensity, short burst, semi-spherical emissions

   while the wig-wag adapts existing illumination fixtures

   into a recognition lights system with attention

   getting qualities only forward of the airplane.



   If you're wanting to craft a wig-wag, you might

   want to exploit the open source work we offered

   here on the List about a year ago.



  http://tinyurl.com/d9q6ntj

    

   This link offers all the information to duplicate

   or expand on the wig-wag project at any level.



   I can offer programmed controllers for $5 each.



   If you want a turn-key wig-wag controller, I have

   those too.



   By the way, any List readers who were monitoring

   discussion and development of this project at

   the time will recall that I was taken to task for

   considering the addition of a HID warm-up delay feature

   in the software. I was told that would violate a "patented"

   wig-wag system currently offered to the OBAM aviation

   community.



   I downloaded the patent cited for study.



  http://tinyurl.com/ms23j3f



   This turned out to be a terribly written document

   that is very broad and cites vague features like "current

   manipulators". Further, it's a 'stealthy' attempt

   to cloak an aviation wig-wag system in some other

   design goal for 'extending bulb life'. The patent cuts a wide

   swath with respect to variations on a theme. For example, on the

   last page we read:



 

 [img]cid:.0[/img]



   This says that any combination of on/off switches combined with

   any sort of flasher will in violation of the patent whether the transition

   from warm-up to flash mode is accomplished manually or automatically

   by timer or software.



   Hence, I could be considered in violation of this

   patent were I to advise anyone that my AEC9012 wig-wag

   controller can be used with HID fixtures by simply commanding

   to both-full-on for a minute before moving the switch

   to wig-wag function. In the interest of collegial harmony

   amongst the OBAM aviation community, I hereby refrain

   from offering such advice. 



   In short, the gentleman who owns this patent should hit

   the attorney up for getting his money back. It's so vague,

   broad and loaded with floobydust (boat load of cited

   references with dubious relevance) as to be essentially

   worthless as a guardian ideas cited in textbooks and

   manufacturer's published data masquerading as original

   intellectual property. 



 

   Bob . . .

1c3eef72.jpg

Description:

Filesize:

136.94 KB

Viewed:

12962 Time(s)

davedup10(at)gmail.com
Guest

Posted: Tue Mar 11, 2014 6:14 pm Post subject: Timer circuit for led array

Bob,A PnP product would be ideal but I'm not opposed to building it if I have instructions (schematic) and can find the parts I will need. David Duperron    Thanks Bob

                              davedup10(at)gmail.com (davedup10(at)gmail.com)

 

On Tue, Mar 11, 2014 at 6:10 AM, Robert L. Nuckolls, III <nuckolls.bob(at)aeroelectric.com (nuckolls.bob(at)aeroelectric.com)> wrote:

 [quote]--> AeroElectric-List message posted by: "Robert L. Nuckolls, III" <nuckolls.bob(at)aeroelectric.com (nuckolls.bob(at)aeroelectric.com)>

  



 At 09:18 PM 3/10/2014, you wrote:

  	  Quote: 	
		   I'm looking for a timer to shut off my cabin overhead utility light after about 10 minutes of operation. It's fed directly from the main battery buss and I would like to know that if I forgot to turn it off the timer would do it for me before draining the battery. Any ideas?

  	
 



   Are you wanting to DIY from scratch parts

   or looking for a Plug-n-Play assembly?

 

   There are dozens of ways to implement this

   on-limit function. I have a micro-controller

   that is configured to offer this functionality

   but you have to wrap a few goodies around

   it. It will eventually find its way into

   a PnP product but for now, it's just the chip.

 

 

   Bob . . . 

 

 ====================================

 -List" target="_blank">http://www.matronics.com/Navigator?AeroElectric-List

 ====================================

 http://forums.matronics.com

 ====================================

 le, List Admin.

 ="_blank">http://www.matronics.com/contribution

 ====================================

 

 

 

 



[b]

nuckolls.bob(at)aeroelect
Guest

Posted: Tue Mar 11, 2014 6:21 pm Post subject: Timer circuit for led array

At 09:11 PM 3/11/2014, you wrote:

 	  Quote: 	
		  Bob,

A PnP product would be ideal but I'm not opposed to building it if I 

have instructions (schematic) and can find the parts I will need. 

David Duperron    Thanks Bob


	




   All the data to duplicate the effort

   at any level is on the website. Look it

   over and choose a level consistent

   with your level of comfort/risk . . .



   Bob . . .

user9253

Joined: 28 Mar 2008
Posts: 1922
Location: Riley TWP Michigan

Posted: Wed Mar 12, 2014 6:37 am Post subject: Re: Timer circuit for led array

Searching for OFF Delay Timing Relay, these were found:

http://www.grainger.com/product/MACROMATIC-Encapsulated-Timer-Rly-21EP68?s_pp=false

http://www.ebay.com/itm/DC-12V-delay-relay-delay-Turn-on-Turn-off-switch-module-with-timer-/251373367057

http://www.digikey.com/product-detail/en/H3FA-AU-DC12V/Z3012-ND/2237310

http://www.mouser.com/ProductDetail/Magnecraft-Schneider-Electric/822TD10H-UNI/?qs=sGAEpiMZZMusEhY1Fvo8txannxpCQaZxnY%2fFt%2fHlWmw%3d

Depending on the relay, a momentary input signal might be required.

Joe

_________________
Joe Gores

dlj04(at)josephson.com
Guest

Posted: Wed Mar 12, 2014 7:13 am Post subject: Timer circuit for led array

There are dome light timer relays for cars

http://www.delcity.net/store/Time-Delay-Relay/p_804415.h_804416.t_1.r_IF1003?gclid=COb_ieijjb0CFc1afgodbl0AUA

Eric M. Jones

Joined: 10 Jan 2006
Posts: 565
Location: Massachusetts

Posted: Wed Mar 12, 2014 8:42 am Post subject: Re: Timer circuit for led array

 	  Quote: 	
		   Timer circuit for led array	Reply with quote

I'm looking for a timer to shut off my cabin overhead utility light after about 10 minutes of operation. It's fed directly from the main battery buss and I would like to know that if I forgot to turn it off the timer would do it for me before draining the battery. Any ideas? David Duperron 	




I learned to fly in Cessnas, and as I recall leaving the beacon on was a certain way to avoid walking away from the airplane with something still on.

Perhaps the solution to your problem is just to have the cabin light on the same bus as the beacon.



Adding an extra gizmo is not the best way to go.

_________________
Eric M. Jones
www.PerihelionDesign.com
113 Brentwood Drive
Southbridge, MA 01550
(508) 764-2072
emjones(at)charter.net

jluckey(at)pacbell.net
Guest

Posted: Wed Mar 12, 2014 9:08 am Post subject: Timer circuit for led array

True but ... 



that overlooks the convenience of always-available cabin lighting without having the Master on.  



The post earlier today that referenced an existing automotive delay relay looks like a great solution - cheap, designed for the purpose, plug-n-play, no re-inventing the wheel 



- what don't we like about that

-Jeff

        From: Eric M. Jones <emjones(at)charter.net>

 To: aeroelectric-list(at)matronics.com 

 Sent: Wednesday, March 12, 2014 9:42 AM

 Subject: Re: Timer circuit for led array

  

 

 --> AeroElectric-List message posted by: "Eric M. Jones" <emjones(at)charter.net (emjones(at)charter.net)>

 	  Quote: 	
		    Timer circuit for led array    Reply with quote

 I'm looking for a timer to shut off my cabin overhead utility light after about 10 minutes of operation. It's fed directly from the main battery buss and I would like to know that if I forgot to turn it off the timer would do it for me before draining the battery. Any ideas? David Duperron 


	




I learned to fly in Cessnas, and as I recall leaving the beacon on was a certain way to avoid walking away from the airplane with something still on.

Perhaps the solution to your problem is just to have the cabin light on the same bus as the beacon.



Adding an extra gizmo is not the best way to go.



--------

Eric M. Jones

www.PerihelionDesign.com

113 Brentwood Drive

Southbridge, MA 01550

(508) 764-2072

emjones(at)charter.net





Read this topic online here:



http://forums.matronics.comnbsp;                    =

 

 

  

 [quote][b]

deej(at)deej.net
Guest

Posted: Wed Mar 12, 2014 9:23 am Post subject: Timer circuit for led array

On 03/12/2014 01:06 PM, Jeff Luckey wrote:

 	  Quote: 	
		   that overlooks the convenience of always-available cabin lighting

 without having the Master on. 


	


Just food for thought, but how is it any more inconvenient to turn on

the master switch versus turning on the light switch?



-Dj



-- 

Dj Merrill - N1JOV - VP EAA Chapter 87

Sportsman 2+2 Builder #7118 N421DJ - http://deej.net/sportsman/

Glastar Flyer N866RH - http://deej.net/glastar/

mrspudandcompany(at)veriz
Guest

Posted: Wed Mar 12, 2014 10:21 am Post subject: Timer circuit for led array

 	  Quote: 	
		   Just food for thought, but how is it any more inconvenient to turn on

 the master switch versus turning on the light switch?


	


    sometimes you may want to only turn on a light and not power up your 

whole panel.



    Roger

nuckolls.bob(at)aeroelect
Guest

Posted: Wed Mar 12, 2014 11:52 am Post subject: Timer circuit for led array

At 01:20 PM 3/12/2014, you wrote:

 	  Quote: 	
		  

<mrspudandcompany(at)verizon.net>



>Just food for thought, but how is it any more inconvenient to turn on

>the master switch versus turning on the light switch?



    sometimes you may want to only turn on a light and not power up 

 your whole panel.



    Roger


	


   We had this conversation many moons ago after somebody

   noticed that some high wing airplanes offered under-wing

   courtesy lights. Then some other readers hypothesized about

   baggage compartment lights on low wing airplanes that

   could be exercised even with the master switch off.



   The on-limit timer allows one to park the airplane

   and perhaps even button up the cockpit while using

   lights on the ship's battery to take care of final

   chores outside.



   I sketched an on-limit timer for somebody who was

   interested in adding the feature his airplane but

   I no longer recall his exact application.



   The notion of an on-limit timer was never to

   replace the forgetful pilot's remembering to

   turn it off . . . but to be able to leave the

   light on for convenience and have it go off by

   itself after the task needing illumination

   was completed.

   Bob . . .

davedup10(at)gmail.com
Guest

Posted: Wed Mar 12, 2014 5:25 pm Post subject: Timer circuit for led array

Thanks for the reply Jeff. Do you have any more info on the automotive light delay relay? Dave Duperron  (davedup10(at)gmail.com (davedup10(at)gmail.com).

 On Wed, Mar 12, 2014 at 1:06 PM, Jeff Luckey <jluckey(at)pacbell.net (jluckey(at)pacbell.net)> wrote:

[quote] True but ... 



that overlooks the convenience of always-available cabin lighting without having the Master on.  



The post earlier today that referenced an existing automotive delay relay looks like a great solution - cheap, designed for the purpose, plug-n-play, no re-inventing the wheel 

 

- what don't we like about that

-Jeff

         From: Eric M. Jones <emjones(at)charter.net (emjones(at)charter.net)>

 To: aeroelectric-list(at)matronics.com (aeroelectric-list(at)matronics.com) 

  Sent: Wednesday, March 12, 2014 9:42 AM

 Subject: AeroElectric-List: Re: Timer circuit for led array

  

  

 --> AeroElectric-List message posted by: "Eric M. Jones" <emjones(at)charter.net (emjones(at)charter.net)>

 	  Quote: 	
		    Timer circuit for led array    Reply with quote

 > I'm looking for a timer to shut off my cabin overhead utility light after about 10 minutes of operation. It's fed directly from the main battery buss and I would like to know that if I forgot to turn it off the timer would do it for me before draining the battery. Any ideas? David Duperron 
	


 



I learned to fly in Cessnas, and as I recall leaving the beacon on was a certain way to avoid walking away from the airplane with something still on.

Perhaps the solution to your problem is just to have the cabin light on the same bus as the beacon.

 

Adding an extra gizmo is not the best way to go.



--------

Eric M. Jones

www.PerihelionDesign.com

113 Brentwood Drive

Southbridge, MA 01550

 [url=tel:%28508%29%20764-2072](508) 764-2072[/url]

emjones(at)charter.net





Read this topic online here:



 

http://forums.matronics.comnbsp;                    =

 

 

  

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[b]

davedup10(at)gmail.com
Guest

Posted: Wed Mar 12, 2014 5:35 pm Post subject: Timer circuit for led array

Thanks for the tip DL, I will investigate further. Dave

On Wed, Mar 12, 2014 at 11:11 AM, D L Josephson <dlj04(at)josephson.com (dlj04(at)josephson.com)> wrote:

 [quote]--> AeroElectric-List message posted by: D L Josephson <dlj04(at)josephson.com (dlj04(at)josephson.com)>

  

 There are dome light timer relays for cars

 http://www.delcity.net/store/Time-Delay-Relay/p_804415.h_804416.t_1.r_IF1003?gclid=COb_ieijjb0CFc1afgodbl0AUA

  

 ====================================

 -List" target="_blank">http://www.matronics.com/Navigator?AeroElectric-List

 ====================================

 http://forums.matronics.com

 ====================================

 le, List Admin.

 ="_blank">http://www.matronics.com/contribution

 ====================================

 

 

 

 [b]

jluckey(at)pacbell.net
Guest

Posted: Wed Mar 12, 2014 8:56 pm Post subject: Timer circuit for led array

Dave,

In case you did not see DL Josepheson's earlier post, here is the link he provided:



http://www.delcity.net/store/Time-Delay-Relay/p_804415.h_804416.t_1.r_IF1003?gclid=COb_ieijjb0CFc1afgodbl0AUA





I don't know anything more about the relay than what's shown at that link, but I imagine using the relay is pretty straightforward.  If you have specific questions, I and other listers will be happy to try and answer them.

-Jeff



        From: David Duperron <davedup10(at)gmail.com>

 To: aeroelectric-list(at)matronics.com 

 Sent: Wednesday, March 12, 2014 6:21 PM

 Subject: Re: Re: Timer circuit for led array

  

 

 Thanks for the reply Jeff. Do you have any more info on the automotive light delay relay? Dave Duperron  (davedup10(at)gmail.com (davedup10(at)gmail.com).

 On Wed, Mar 12, 2014 at 1:06 PM, Jeff Luckey <jluckey(at)pacbell.net (jluckey(at)pacbell.net)> wrote:

[quote] True but ... 



that overlooks the convenience of always-available cabin lighting without having the Master on.  



The post earlier today that referenced an existing automotive delay relay looks like a great solution - cheap, designed for the purpose, plug-n-play, no re-inventing the wheel 

 

- what don't we like about that

-Jeff

         From: Eric M. Jones <emjones(at)charter.net (emjones(at)charter.net)>

 To: aeroelectric-list(at)matronics.com (aeroelectric-list(at)matronics.com) 

  Sent: Wednesday, March 12, 2014 9:42 AM

 Subject: Re: Timer circuit for led array

  

  

 --> AeroElectric-List message posted by: "Eric M. Jones" <emjones(at)charter.net (emjones(at)charter.net)>

 	  Quote: 	
		    Timer circuit for led array    Reply with quote

 > I'm looking for a timer to shut off my cabin overhead utility light after about 10 minutes of operation. It's fed directly from the main battery buss and I would like to know that if I forgot to turn it off the timer would do it for me before draining the battery. Any ideas? David Duperron 
	


 



I learned to fly in Cessnas, and as I recall leaving the beacon on was a certain way to avoid walking away from the airplane with something still on.

Perhaps the solution to your problem is just to have the cabin light on the same bus as the beacon.

 

Adding an extra gizmo is not the best way to go.



--------

Eric M. Jones

www.PerihelionDesign.com

113 Brentwood Drive

Southbridge, MA 01550

 [url=](508) 764-2072[/url]

emjones(at)charter.net





Read this topic online here:



 

http://forums.matronics.comnbsp;                    =

 

 

  

  	  Quote: 	
		  


ist" target="_blank">http://www.matronics.com/Navigator?AeroElectric-List

tp://forums.matronics.com

_blank">http://www.matronics.com/contribution


	




[b]

rickofudall

Joined: 19 Sep 2009
Posts: 1392
Location: Udall, KS, USA

Posted: Thu Mar 13, 2014 7:59 am Post subject: Timer circuit for led array

I haven't done a survey of the entire automotive world, but it seems as if every car today has convenience lighting that turns on the interior lights when the doors are unlocked and again when the car is turned off. On my 2006 Toyota truck, they turn off when the doors are locked, either with the switch on the door or with the remote. Perhaps a You Pick car wrecker would be a good place to grab a circuit whole for a relative cheap price.

Rick Girard

do not archive



 On Wed, Mar 12, 2014 at 11:55 PM, Jeff Luckey <jluckey(at)pacbell.net (jluckey(at)pacbell.net)> wrote:

 	  Quote: 	
		   Dave,



 

In case you did not see DL Josepheson's earlier post, here is the link he provided:

 

http://www.delcity.net/store/Time-Delay-Relay/p_804415.h_804416.t_1.r_IF1003?gclid=COb_ieijjb0CFc1afgodbl0AUA

 



 



I don't know anything more about the relay than what's shown at that link, but I imagine using the relay is pretty straightforward.  If you have specific questions, I and other listers will be happy to try and answer them.

 



 -Jeff



        From: David Duperron <davedup10(at)gmail.com (davedup10(at)gmail.com)>

  To: aeroelectric-list(at)matronics.com (aeroelectric-list(at)matronics.com) 

 Sent: Wednesday, March 12, 2014 6:21 PM

  Subject: Re: AeroElectric-List: Re: Timer circuit for led array

  

 

 Thanks for the reply Jeff. Do you have any more info on the automotive light delay relay? Dave Duperron  (davedup10(at)gmail.com (davedup10(at)gmail.com).

 



 On Wed, Mar 12, 2014 at 1:06 PM, Jeff Luckey <jluckey(at)pacbell.net (jluckey(at)pacbell.net)> wrote:

 	  Quote: 	
		    True but ... 



that overlooks the convenience of always-available cabin lighting without having the Master on.  

 The post earlier today that referenced an existing automotive delay relay looks like a great solution - cheap, designed for the purpose, plug-n-play, no re-inventing the wheel 

 

- what don't we like about that

-Jeff

          From: Eric M. Jones <emjones(at)charter.net (emjones(at)charter.net)>

  To: aeroelectric-list(at)matronics.com (aeroelectric-list(at)matronics.com) 

  Sent: Wednesday, March 12, 2014 9:42 AM

 Subject: AeroElectric-List: Re: Timer circuit for led array

  

   

 --> AeroElectric-List message posted by: "Eric M. Jones" <emjones(at)charter.net (emjones(at)charter.net)>

 	  Quote: 	
		    Timer circuit for led array    Reply with quote

  > I'm looking for a timer to shut off my cabin overhead utility light after about 10 minutes of operation. It's fed directly from the main battery buss and I would like to know that if I forgot to turn it off the timer would do it for me before draining the battery. Any ideas? David Duperron 
	


  



I learned to fly in Cessnas, and as I recall leaving the beacon on was a certain way to avoid walking away from the airplane with something still on.

Perhaps the solution to your problem is just to have the cabin light on the same bus as the beacon.

  

Adding an extra gizmo is not the best way to go.



--------

Eric M. Jones

www.PerihelionDesign.com

113 Brentwood Drive

Southbridge, MA 01550

  (508) 764-2072

emjones(at)charter.net





Read this topic online here:



 

http://forums.matronics.comnbsp;                    =

 

 

  



  	  Quote: 	
		  



ist" target="_blank">http://www.matronics.com/Navigator?AeroElectric-List

tp://forums.matronics.com

_blank">http://www.matronics.com/contribution



	




	




 

 

  

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ist" target="_blank">http://www.matronics.com/Navigator?AeroElectric-List

tp://forums.matronics.com

_blank">http://www.matronics.com/contribution



	




	




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Thanks, Homer GBYM

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