The usual technique for producing LED tracking markers is great. But without a resistor in series they burn through batteries quickly, plus can’t be dimmed. So I came up with my own technique. You can read how to build your own here: http://bct.me/tutorials/making-led-tracking-markers/
In order to deliver a personalized, responsive service and to improve the site, we remember and store information about how you use it. This is done using simple text files called cookies which sit on your computer. These cookies are completely safe and secure and will never contain any sensitive information. They are used only by fxguide or the trusted partners we work with.OK