RE: How to make a flashing LED?
A better link to Electronic Circuits for RC: [link=http://www.speedy-bl.com/electr-e.htm]Click me - RC Cicuits[/link]
And a VERY GOOD and complete pre-wired plane lighting system for only $9.60/ea!!! Or rather the whole setup!
[link=http://www.hobbycity.com/hobbyking/store/uh_viewItem.asp?idProduct=8850&Product_Name=Turnig y_R/C_LED_Lighting_System]Lighting System - Click me![/link] < Much cheaper than ANYTHING you'll find at the RatShack and much nicer too.
The latter has full flashing LED's simulating rotating beacons, landing lights, etc.... for a great price!