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OT: Can someone help me with LED Lights in a display cabinet

My 9-year-old daughter likes to collect "jewels". Really just large pieces of glass cut into diamond shapes with lots of facets. She wants me to make her a display cabinet with lights under them so they glow.

I priced out a commercially made LED lights and controller and it would be over $200. Seems like a lot for 12 LED's and a wall wart.

I found the URL below which gives me almost all the information I want to know. The LED's I'm looking at are clear white 1800mcd and have a forward voltage of 3.5V @20mA. According to the calculator I would need a 50V transformer.

Instead of running them all in series, can I run a series parallel configuration? For example:



|-- 82R -- LED -- LED -- LED
|
|-- 82R -- LED -- LED -- LED
12V --|
|-- 82R -- LED -- LED -- LED
|
|-- 82R -- LED -- LED -- LED



Thanks for your help.


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Topic - OT: Can someone help me with LED Lights in a display cabinet - dbishopbliss 09:28:51 09/14/09 (7)

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