The Facelesstech blog discusses making an LED lit badge holder:
I’ve been wanting to make more LED based projects. I seen people using the “LED noodles/LED filament” and ordered some to play with. I noticed that 2 of the 130mm strips would fit the outside of an ID badge holder. This got me thinking, Could I make a light up LED ID holder to go on my LED lanyard….
I had already been playing around with ID badge holders so I had a good basic to work off. My idea was to have everything drop in under the ID badge and use the ID badge as a cover. My idea was to have the battery in the centre of the ID badge and have the positive end of filament strip at the top connecting to the switch and the negative ends at the bottom. To save space I was going without using a battery holder and just use solid cord wire, One wire would sit under the battery (Negative) and one would sit onto of the battery (Positive) and the ID badge would push them onto the battery and make contact.
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