Adding a flashing becon light

[tomustang]

I would suggest looking into how the EOT (end of train decvices) are made, they are essentially a light with chip hooked up to a dedicated truck to feed power to them

Here's a link <!-- m --><a class="postlink" href="http://www.ringengineering.com//EotDevice.htm">http://www.ringengineering.com//EotDevice.htm</a><!-- m -->

At the bottom they have videos of it in action