Matronics Email Lists :: View topic

Matronics Email Lists
Web Forum Interface to the Matronics Email Lists

Get Email Distribution Too! FAQ Search Memberlist Usergroups Register

Profile Log in to check your private messages Log in

OS Wig-Wag Project

Matronics Email Lists Forum Index -> AeroElectric-List

View previous topic :: View next topic

Author Message

nuckolls.bob(at)aeroelect
Guest

Posted: Sat Jun 02, 2012 7:21 pm Post subject: OS Wig-Wag Project

Had a little hitch in the assembly task. Found a layout

error on the board and some scrambled numbers in the

connector pin-outs. All has been fixed, a board stuffed

and static tested.  The SOIC-8 mos-fets will sink 1.5 amps

with no more than 0.040 volts drop. Higher currents will

be proportionally higher but still quite satisfactory to our

needs.



The revised data package and pictures are posted at:



http://tinyurl.com/6w9vndk



I'll mail you a proof-of-concept board, test harness

and enclosure to work with on Monday.



Bob . . .



At 12:50 PM 5/4/2012, you wrote:

 	  Quote: 	
		  



Bob,



Send one out to me, please...



I will test the current software and if it checks out I will flash some

PIC12F683 chips and send them out to you. If there is anyone else

who is getting one of the initial boards and would like a flashed

micro let me know.



Greg McHugh

4201 N Willoway Estates Ct

Bloomfield Hills, MI 48302





Read this topic online here:



http://forums.matronics.com/viewtopic.php?p=372397#372397



-----

No virus found in this message.

Checked by AVG - www.avg.com


	




   Bob . . .

tim2542(at)sbcglobal.net
Guest

Posted: Sat Jun 02, 2012 8:16 pm Post subject: OS Wig-Wag Project

Will this gadget replace the simple automotive 3 terminal flasher I'm using now for Wig/Wag? I assume it's going to have timing options or something that makes it better than a flasher.

Thanks, Tim



Sent from my iPad



On Jun 2, 2012, at 8:19 PM, "Robert L. Nuckolls, III" <nuckolls.bob(at)aeroelectric.com> wrote:



 	  Quote: 	
		   

 

 Had a little hitch in the assembly task. Found a layout

 error on the board and some scrambled numbers in the

 connector pin-outs. All has been fixed, a board stuffed

 and static tested.  The SOIC-8 mos-fets will sink 1.5 amps

 with no more than 0.040 volts drop. Higher currents will

 be proportionally higher but still quite satisfactory to our

 needs.

 

 The revised data package and pictures are posted at:

 

 http://tinyurl.com/6w9vndk

 

 I'll mail you a proof-of-concept board, test harness

 and enclosure to work with on Monday.

 

 Bob . . .

 

 At 12:50 PM 5/4/2012, you wrote:

> 

> 

> Bob,

> 

> Send one out to me, please...

> 

> I will test the current software and if it checks out I will flash some

> PIC12F683 chips and send them out to you. If there is anyone else

> who is getting one of the initial boards and would like a flashed

> micro let me know.

> 

> Greg McHugh

> 4201 N Willoway Estates Ct

> Bloomfield Hills, MI 48302

> 

> 

> 

> 

> Read this topic online here:

> 

> http://forums.matronics.com/viewtopic.php?p=372397#372397

> 

> 

> 

> 

> 

> 

> 

> 

> 

> 

> 

> -----

> No virus found in this message.

> Checked by AVG - www.avg.com

 

 

  Bob . . .

nuckolls.bob(at)aeroelect
Guest

Posted: Sat Jun 02, 2012 8:56 pm Post subject: OS Wig-Wag Project

At 11:15 PM 6/2/2012, you wrote:

 	  Quote: 	
		  



Will this gadget replace the simple automotive 3 terminal flasher 

I'm using now for Wig/Wag? I assume it's going to have timing 

options or something that makes it better than a flasher.

Thanks, Tim


	


   This project was conceived as an alternative to

   the automotive 3-terminal flashers that don't work

   well on LED landing lights.



   As you can see from the wiring diagram in the

   data package that the control switch doesn't

   carry lamp current . . . so it can be a minature,

   low current device.



   We hadn't talked about timing options. But there

   are a couple of extra inputs to the board that

   could be used to select flash rates.



   Bob . . .

gregmchugh

Joined: 03 Apr 2012
Posts: 42

Posted: Sun Jun 03, 2012 8:03 am Post subject: Re: OS Wig-Wag Project

Bob,



Very good, I will test the software with the hardware. I had

also considered using the last two inputs to control the wig-wag

interval. I have it set to 750 millisec at the moment which seems

to be a standard value for aircraft wig-wag (each light flashes

40 times per minute). The last two inputs could be used to allow

the interval to be controlled via jumpers or a switch.



In terms of using this as a replacement for the auto flasher, I

guess the only restriction would be the maximum lamp power

limit which you are planning to define after additional hardware

testing.



Also, there was at least one other person who was interested in

software development who requested a board to use for

testing. See below...



Greg McHugh



-------------------

Bob, 

I'd like one of the boards. I'm not sure if I'll be herding bytes, or they will be herding me, but I'd like to try! Please let me know what I owe you for it. 



Greg - as long as I've got your code, I'll try to flash my own chip... but I'll contact you if I can't get it to work!!  



Thank you!! 



Paul A. Fisher 

8428 114th Avenue West 

Taylor Ridge, Illinois 61284 

--

nuckolls.bob(at)aeroelect
Guest

Posted: Sun Jun 03, 2012 9:27 am Post subject: OS Wig-Wag Project

At 11:03 AM 6/3/2012, you wrote:

 	  Quote: 	
		  



Bob,



Very good, I will test the software with the hardware. I had

also considered using the last two inputs to control the wig-wag

interval. I have it set to 750 millisec at the moment which seems

to be a standard value for aircraft wig-wag (each light flashes

40 times per minute). The last two inputs could be used to allow

the interval to be controlled via jumpers or a switch.


	


   Yes. I think I've got the inputs configured wrong.

   They'd need +5 pullup resistors and I've condifigured

   them with voltage dividers . . . but we can work that

   out.



 	  Quote: 	
		  In terms of using this as a replacement for the auto flasher, I

guess the only restriction would be the maximum lamp power

limit which you are planning to define after additional hardware

testing.


	


   Correct. I'm not sure I'd recommend this set of

   hardware for incandescent lamps. The 3-terminal

   auto flasher is a really good value and well

   suited to the task.

 	  Quote: 	
		  Also, there was at least one other person who was interested in

software development who requested a board to use for

testing. See below...


	


   Yes. I'm packing up for a 3-day stint in Wichita

   to finish some bunkbeds for may grandsons. Will

   be back on Thursday. I'll get another board stuffed

   for Paul.



   Bob . . .

gregmchugh

Joined: 03 Apr 2012
Posts: 42

Posted: Wed Jun 06, 2012 2:10 pm Post subject: Re: OS Wig-Wag Project

Bob,



Hardware arrived in the mail today. I should have some test

results by the end of the week.



Greg McHugh

gregmchugh

Joined: 03 Apr 2012
Posts: 42

Posted: Thu Jun 07, 2012 10:17 am Post subject: Re: OS Wig-Wag Project

Bob,



Had a chance to power-up the proof of concept board you sent and

it seems to be working fine with my current software version which

I updated to reflect the final hardware I/O configuration for the

board. I will do some more testing tomorrow and then I will send out

some flashed PIC chips to you. I have the wig-wag logic set

to switch every 666 millisec (45 per minute flash rate) which seems

to be a typical rate for certified wig-wag flashers. If you want a

different value let me know. I will post the final software version I

used to flash the chips.



How many chips should I send to you?



Should I send them to the home address that was on the parcel

you sent or to the P.O. box for Aeroelectric?



Greg McHugh

nuckolls.bob(at)aeroelect
Guest

Posted: Thu Jun 07, 2012 2:05 pm Post subject: OS Wig-Wag Project

At 01:17 PM 6/7/2012, you wrote:

 	  Quote: 	
		  



Bob,



Had a chance to power-up the proof of concept board you sent and

it seems to be working fine with my current software version which

I updated to reflect the final hardware I/O configuration for the

board. I will do some more testing tomorrow and then I will send out

some flashed PIC chips to you. I have the wig-wag logic set

to switch every 666 millisec (45 per minute flash rate) which seems

to be a typical rate for certified wig-wag flashers. If you want a

different value let me know. I will post the final software version I

used to flash the chips.



How many chips should I send to you?



Should I send them to the home address that was on the parcel

you sent or to the P.O. box for Aeroelectric?


	


   One chip will suffice. The P.O. box is the place to

   go. I forget, were you planning to use this device

   on your airplane . . . or just willing to thrash bytes

   for grins?



   We might talk about modifying the code (and the boards)

   to use the extra two inputs as flash-rate selection pins.



   I think I'd move the command lines over to the filtered

   pins now 'rigged for analog' and use the two unfiltered

   pins for flash rate selection.



   Bob . . .

gregmchugh

Joined: 03 Apr 2012
Posts: 42

Posted: Thu Jun 07, 2012 3:03 pm Post subject: Re: OS Wig-Wag Project

Bob,



I am planning to use it in the Xenos motor glider I am building but

I am probably a year away from the point where I will need it. I

think I will stick with the single flash rate on my installation but

variable rate seems to be a popular option on many of the

certified wig-wag systems.



If you want the initial software to support the variable flash rate

on the wig-wag I can handle that. Let me know how you want

to configure the changes to the inputs. Is the board you sent

me already set up to handle this with the way it is configured?

I can add the two other input lines to the test harness you

sent.



I would think that three rate settings would be enough, maybe

45 flashes per minute for the default rate, and then 90 and 120

flashes for higher rates. That would be the flash rate for

each of the lamps, alternating lamps to get the wig-wag. I

would think that 3 rate settings would be enough using the

same type of switch you have on the other set of inputs.



I can test a software version with the variable rate before I

send it to you if the board can handle it.



I think I mentioned before that the only other option I thought

of would be for aircraft that have both taxi and landing lights

and that want to have the option to run with just the taxi lights

on the ground but still use the taxi lights in the wig-wag mode

in the air. You could configure the two control inputs to handle

4 modes using the current switch for Off-Taxi Only-Both On and a 

second switch for Wig-Wag (ground both the inputs). Not something

I need for my needs but I can imagine someone wanting this

option. Just a software change needed and adding the second

switch.



Greg McHugh

nuckolls.bob(at)aeroelect
Guest

Posted: Sat Jun 09, 2012 5:51 am Post subject: OS Wig-Wag Project

At 06:03 PM 6/7/2012, you wrote:

  	  Quote: 	
		  --> AeroElectric-List message posted by: "gregmchugh" <gregmchugh(at)aol.com>



 Bob,



 

 If you want the initial software to support the variable flash rate

 on the wig-wag I can handle that. Let me know how you want

 to configure the changes to the inputs. Is the board you sent

 me already set up to handle this with the way it is configured?

 I can add the two other input lines to the test harness you

 sent. 	


    Are you in possession of the tools and skills to work with

    1206 surface mount components?  The board I sent you has



 [img]cid:.0[/img]

    R26 and R27 installed. Those need to be removed

    and replaced by R11 and R14. I don't try to 'save'

    a removed SMD component. So I'd wick the solder off

    the two un-needed resistors and install two new ones.



    Why don't I assemble the second board configured for

    two sets of control inputs and you could put the finishing

    touches on your code.



    

  	  Quote: 	
		  I would think that three rate settings would be enough, maybe

 45 flashes per minute for the default rate, and then 90 and 120

 flashes for higher rates. That would be the flash rate for

 each of the lamps, alternating lamps to get the wig-wag. 	




    The LEDs are much more effective at the high rates than

    incandescent lamps. 3 events per second is supposed to

    be the 'magic' attention-getter. Those values sound good to me.

  



  	  Quote: 	
		  I would think that 3 rate settings would be enough using the

 same type of switch you have on the other set of inputs. 	


    Let me pray over some controls topology for adding

    independent control of the two lights.



 

 

   Bob . . .

6ae23e.jpg

Description:

Filesize:

54.63 KB

Viewed:

9320 Time(s)

gregmchugh

Joined: 03 Apr 2012
Posts: 42

Posted: Sat Jun 09, 2012 7:41 am Post subject: Re: OS Wig-Wag Project

Bob,



I won't attempt to make the changes to the board. I will send

out a flashed PIC today with the default code that I have 

been using for testing. When you send me a board with

the inputs reconfigured we can decide on how to configure

the variable flash rate option.



Attached is the source code for the PIC I am sending you.



Greg McHugh

wigwag.c

Description:

Download

Filename:

wigwag.c

Filesize:

7.88 KB

Downloaded:

438 Time(s)

Display posts from previous:

	Matronics Email Lists Forum Index -> AeroElectric-List	All times are GMT - 8 Hours
Page 1 of 1

Jump to:

You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
You cannot attach files in this forum
You can download files in this forum