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Hi,

Does anyone make a white flashing LED bulb that works on transformer track power from 12 to 18 volts AC current?

I want it to flash like once every second.

I tried a DC LED with a bridge rectifier to convert DC to AC but the flashing of the LED speeds up that by 14 volts the
flashes are so fast it almost becomes a solid bright light.

Where can I find a once a second (or less) constant flashing LED that works on transformer track power at 12-18 volts AC.

Thanks alot. 

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Actually, with flashing LED's they need filtered DC to do their thing.  A simple way to get consist ant flashing with variable power input is to use diode, capacitor filter, and a 3-terminal regulator.  If you use an LM7805, you can then simple use a dropping resistor in the 150-500 range to adjust the light output and flash rate of most flashing LEDs.

 

I have been buying lots of LED's that work with AC or DC from Evans Designs.

They have a great selection.

I hooked up some colored lights for the lighting the fire for the Hobo on the roof of the Polar Express. Have used them for various flashing lights and bright lights for headlights in Engines Caboose etc.

 

Check it out cheap and do not need all the extra stuff suggested above. Each bulb has its own stuff to handle AC and up to 19 Volts.

The ones I have used all different types start lighting at low volts and are fairly bright from about 8 volts up. Think this will be perfect for what you are looking for.

 

This is the link to the page for the bulbs that work on variable AC

 

http://www.modeltrainsoftware.com/bl-213-f.html

 

These Super Bright Flashing LEDs come Fully Assembled  shrink tubed, wired and ready to use with
8 inches of insulated wire after the rectifier. Connect these LEDs to any track power source: AC DC or DCC. They will work great with 5-19 Volts of Power. These Flashing LEDs don't need a circuit board, and look great as end of train devices, on Maintenance of Way vehicles, as Oscillating Headlights, on Die Cast Emergency Vehicles, warning flashers, and more!

Last edited by kj356
Originally Posted by riki:
However, I'm open to any and all suggestions from others.

 

If this is a one-off application, by all means go with the ready-to-run solution.

 

But as it looks like you're willing to tinker with parts, if you plan to add other LED lights (steady, flashing, flickering, LED strips, whatever) or DC-powered layout accessories here's another approach.  You have the bridge already so get an eBay 99 cent (free shipping) DC-in to DC-out voltage regulator module.  Now you have regulated DC (5V, 12V, whatever you set it to).  And you can choose from a wider variety of LED devices at a much lower total cost.  That is, for each additional LED add the appropriate 5 cent resistor and off you go.

 

led alternatives

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