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andrew.d.zachar(at)gmail.
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 Posted: Mon Oct 18, 2010 10:22 am Post subject: Rolling my own WigWag Circuit (with timer)...need help (WOR |
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Thanks Jon.
I have started to read about the 555 timer, but realized that to get what I wanted, I was going to have to build it.
That kit looks like the perfect plug-in for the timer part of my setup. I only need the timer to activate the relay, so I think I'll be okay with lower amperage. I'm using the B&C 12V 40A SPDT relay for the electrons that are going to the lights.
I'm still baffled about the wig-wag flasher operation. The buzzing (in the video) and the inability for it to complete a full "cycle" has me puzzled. Any ideas?
Thanks again for the kit link. I'll get one ordered this afternoon and re-post on how it works.
-az
On Mon, Oct 18, 2010 at 1:55 PM, jonlaury <jonlaury(at)impulse.net (jonlaury(at)impulse.net)> wrote:
| Quote: | --> AeroElectric-List message posted by: "jonlaury" <jonlaury(at)impulse.net (jonlaury(at)impulse.net)>
Andrew,
What you need is a 555 timer. There are zillions of circuits discussed on the web. Or maybe someone on the forum will chime in.
I'm not an electronics whiz, but this was a piece of cake to assemble from http://www.electronickits.com/kit/complete/elec/ck1614.htm?gclid=CNPA94rj2o4CFRcIYgodoEizAA.
The PCB traces may need heavier wire overlays for landing lights, but the relay contacts are nominally good for 10a in this kit. I'm sure that someone out there makes a heavier gauge kit or can suggest how to modify this one to handle more current if your ldg lights require it.
good luck,
John
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=316210#316210
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Andrew Zachar
andrew.d.zachar(at)gmail.com (andrew.d.zachar(at)gmail.com)
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mdnanwelch7(at)hotmail.co
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| Posted: Mon Oct 18, 2010 10:49 am Post subject: Rolling my own WigWag Circuit (with timer)...need help (WOR |
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> What you need is a 555 timer. > good luck,
John, group,
Radio Shack sells a neat little handbook with dozens and dozens of 555 timer circuits. I've
built a few of them (like the infared sensor circuit and the cascading LEDs circuit, to name a couple).
Oh, here it is next to computer! Written by Forrest M. Simms, it is a great little book for a guy
to learn AND build some handy little electronic projects. I have his little "mini" notebook, plus
I ended up getting the much larger hand-book (which is around here somewhere).
If you are new to electronics, or have limited actual hands-on experience (like me), the Radio Shack
boolkets are a great way to introduce yourself to hands-on circuits that are fairly easy to build.
Also, a quick update. I recently complained about Digikey's shipping prices, and found I had overlooked
their shipping choice window. Now that I know better, I chose the cheapest shipping method (I'm in no hurry),
plus I made a direct price comparison with Digikey and Mouser, and Digikey was significantly cheaper.
I feel if you can complain publicly, you should reward in public, too. Digikey goes back to the top of my
'electronics houses' list.
Mike Welch
[quote][b]
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andrew.d.zachar(at)gmail.
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| Posted: Mon Oct 18, 2010 11:31 am Post subject: Rolling my own WigWag Circuit (with timer)...need help (WOR |
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Jon, all:
After looking around a little more at www.electronickits.com, I found this timer: http://www.electronickits.com/kit/complete/timers/canck002.htm. Cheaper, smaller, etc. than the multi-mode timer.
Instead of Delayed ON, it is Delayed OFF. I could easily switch the NO and NC parts of my circuit, but I'm wondering about the following things:
1) My SPDT relay would be closed less (instead of closed while wig-wagging, it is only closed for the 30 second timing period (presumably twice per flight for 30 seconds, instead of twice per flight for 5 minutes?)) Does this matter?
2) If the timer fails, it would default to flashing, which could flash the HIDs prematurely (harmful to HIDs). A delayed ON timer failure would prevent flashing, which is acceptable from a "harmful to HIDs" standpoint.
3) Will I get a few milliseconds of flasher activation before the relay closes once voltage is applied?
A simplified diagram to illustrate the difference between the two. (Omitted the switches, but the "switched +14VDC" is the landing light switch.)
http://n999za.files.wordpress.com/2010/10/delayedonvsdelayedoff.jpg
I'm thinking based on the failure cases, I prefer delayed ON.
Maybe I'll just spring for the multi-mode timer and get the delayed ON function I need (mode 3 as described in http://www.electronickits.com/kit/complete/elec/ck1614.pdf).
Hmm.
-az
On Mon, Oct 18, 2010 at 1:55 PM, jonlaury <jonlaury(at)impulse.net (jonlaury(at)impulse.net)> wrote:
| Quote: | --> AeroElectric-List message posted by: "jonlaury" <jonlaury(at)impulse.net (jonlaury(at)impulse.net)>
Andrew,
What you need is a 555 timer. There are zillions of circuits discussed on the web. Or maybe someone on the forum will chime in.
I'm not an electronics whiz, but this was a piece of cake to assemble from http://www.electronickits.com/kit/complete/elec/ck1614.htm?gclid=CNPA94rj2o4CFRcIYgodoEizAA.
The PCB traces may need heavier wire overlays for landing lights, but the relay contacts are nominally good for 10a in this kit. I'm sure that someone out there makes a heavier gauge kit or can suggest how to modify this one to handle more current if your ldg lights require it.
good luck,
John
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=316210#316210
===========
-List" target="_blank">http://www.matronics.com/Navigator?AeroElectric-List
===========
http://forums.matronics.com
===========
le, List Admin.
="_blank">http://www.matronics.com/contribution
===========
|
--
Andrew Zachar
andrew.d.zachar(at)gmail.com (andrew.d.zachar(at)gmail.com)
[quote][b]
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