Instructables
Picture of DIY Portable Ring Light

 
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Step 1: Step 1

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I started with the plastic top from some blank CDs

Step 2:

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Divide the surface into quadrants. I used a lens hood that came with my lens to trace out the hole for the lens. Put about 10 LEDs per quadrant

Step 3: Step 3

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Drill out the holes and cut out the middle

Step 4: Step 4

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Paint it. Make sure you use a spray paint that works with a soft plastic

Step 5: Step 5

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Drying

Step 6: Step 6

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LEDs in all the holes

Step 7: Step 7

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All the LEDs need to be soldered in parallel and not sequence. Working with a 9 volt battery i split the LEDs into groups of 3. Take the positive and negatives from all the groups and solder them togeather.

Step 8: Step 8

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Should look something like this

Step 9: Step 9

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Added a push button to turn it on/off

Step 10: Step 10

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Battery clip

Step 11: Step 11

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The hood from my lens is just epoxy'd into the center. Also added an inch of a chopstick with epoxy to the right side for stability when pressing the button

Step 12: Step 12

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The final product was a little too bright so i added a potentiometer to adjust brightness

Step 13: Step 13

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Step 14: Step 14

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Step 15: Step 15

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Step 16: Step 16

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All done

Step 17: Test

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toni.ivos1 month ago

What kind of potentiometer did you use? Ohms?

rendly2 months ago

There are three sets of LEDs. Each LED in each set is wired in Parallel, that is (+) to (+) and (-) to (-). Then each of the sets are wired to the next set (+) to (-) in series. The two remaining leads from the end two sets are wired to the battery. Thus, each set is only connected to one third of the 9V battery, or 3Volts.

Did you put any resistors in to prevent the LEDs from being burned out by the 9V? If so, what value, how many, and where?

Thanks for the write up, looks awesome!
agis683 years ago
excellent!!!
zieak4 years ago
Cool use of an old cd spindle cover!
NikonDork4 years ago
Any shots with this in the dark or sample images to see how much light this thing throws off?
chrismillar (author)  NikonDork4 years ago
put a few test shots up. Step 17
chrismillar (author)  NikonDork4 years ago
i'll throw a few up tonight or tomorrow ;)
chrismillar (author) 4 years ago
Test shots. Works great in light, a bit too bright at night time though if your eyes are adjusted to the dark. Haven't messed around too much with the dimmer at night time but its a must.