Model Airplane Flashing LED
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Tuborg
May 20, 2008, 8:55pm Report to Moderator

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My brother-in-law is a model airplane guy and wants a flashing white (white-only) LED on his airplane.  

The plane has a 3.7V supply for the lights.   Anyone know a quick way to build a circuit for this - or sources.   The model airplane circuit retails for over $30 - and I figure its gotta be cheaper...

I guess the white flashing is like a strobe - maybe a 1/2 second interval??

Is using a 555 timer chip overkill?   Would you just use a small breadboard for the circuit?


Thanks.
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Meat Popsicle
May 20, 2008, 9:03pm Report to Moderator

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I have thought about building a flashing lamp circuit before (unrelated pin project).  Just google 'flashing circuit' + led  there are plenty of links.

You can build one ... and many out there are 555 circuits.  But I wanted a cheap solution, so  I came to the conclusion to buy a dollar store item that had flashing LED and harvest components from it.  The only downside to this approach is that you are not in control of the footprint.  But you can't beat a dollar for a complete circuit with LED.  Just a thought.

Good luck.
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websherpa
May 20, 2008, 9:26pm Report to Moderator

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http://www.kpsec.freeuk.com/projects/flashl.htm

There exists flashing LEDs with an IC built right in to do the flashing, but the flash rate is fixed.  


Wayne (webSherpa) "WEB"
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MacPhreak
May 20, 2008, 10:37pm Report to Moderator
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The easist chip to use would be the LM3909. It is specifically designed to flash LED's. I even have one here still in it's package I had Purchased from Radio Shack about 10 years ago. It's versatile and easy to setup. Just change the Cap to adjust the speed and it can use 1 to 6 volts.. http://www.uoguelph.ca/~antoon/circ/ledflash.htm

I have a PDF file if you want it or just Google it.
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Tuborg
May 20, 2008, 11:19pm Report to Moderator

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Quoted from Meat Popsicle
But you can't beat a dollar for a complete circuit with LED.  Just a thought.


Too funny.   This is what he had already done.   Thanks for the other ideas - I think he now has a few ideas.   Maybe he'll make that BOPP part for kick-out hole I need now.    He's a civil technologist - translation for me is he can build pretty much about anything out of metal...
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AMX
May 21, 2008, 6:55am Report to Moderator

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Tuborg
May 21, 2008, 7:08am Report to Moderator

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Quoted from AMX
http://cgi.ebay.com/5x-3mm-Whi.....sidZp1742.m153.l1262


That's awesome - we spent about 30 minutes surfing ebay last night with no luck - kept searching "flashing" though - and would get the multicolor flashing LED's.

Thanks.
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Mrhide
May 21, 2008, 2:50pm Report to Moderator

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Quoted from AMX
http://cgi.ebay.com/5x-3mm-Whi.....sidZp1742.m153.l1262


should that seller be trusted ? did he made sales before ?!    


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Tuborg
May 21, 2008, 2:58pm Report to Moderator

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Yeah - I had the same question.  Sent him a question - no response yet.
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Meat Popsicle
May 21, 2008, 4:13pm Report to Moderator

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usually the guys from HK who deal en mass are legit.  I would be careful about your logins and Credit info though. and make sure the transactions are done through ebay/PayPal or cash/money order.
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AMX
May 21, 2008, 8:44pm Report to Moderator

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I made some transactions with this seller without any problems and he ship VERY FAST! I always payed via Paypal.


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