LED ring illuminator for inspection microscope

LED ring lights objects with minimal shadows


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I designed this illuminator to replace an old, beat up, fluorescent ring light on an inspection microscope. It uses a 3.5W, 70 mm OD, chip-on-board LED ring purchased via ebay (2 for $10 including shipping!) and is powered by a 12V wall-wart. The LEDs provide 6500k light so color rendition is good and color coded electronic components can be easily read.

Materials and methods

The LED ring and its companion buck-converter get a little warm in operation so it's probably best to print this with ABS.

Here's the LED ring I used: http://www.ebay.com/itm/272155023035

I included a mini toggle switch and just hard wired it to the power supply because I didn't have a power supply connector handy.



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878c5f29684e43ab72f6e32c4092ad09?default=blank&size=40arc7217 added this to the tools collection ago
8868941f6a32bdf2206f476aa360642b?default=blank&size=40eric777 added this to the Tools collection ago
Mini gold hands croppedMark Rehorst published this design ago