The stuff of Kryton

An eclectic selection of technology with some cookery

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Project maintained by kryton-me Hosted on GitHub Pages — Theme by mattgraham

LED ring light

Why?

One hobby of mine is Macro Photography and light is always a struggle. I got my idea to do this from a bigclive.com video. After some experimenting with a set of LED lights on a copper string I got a good result with just leds and no deffuser.

Requirements (some a bit Would Be Nice):

• High CRI rated LEDs >90
  • best for accurate photography results
• 4000k+ Colour Temperature
  • For good daylight colour rendition
  • Can then be used in daylight and not have problems
• PTH LEDs
  • Can fit the LEDs in to 5/3mm holes in a disc
  • Saves having to design a PCB
• Dimmable (WBN)
  • Being able to adjust the light level
• USB powered (WBN)
  • Use USB batter pack for portability
  • 5.25 - 4.5V
  • if no driver IC LED needs to oprate on 4.5V less resistor drop.

Potential Components:

• LED driver MAX6971ANG+
• Struggled to find suitable LEDs PTH.

First experiment

Feeling lazy I brought a 5m reel of 60 CRI90 4000K-4500K LEDs, On a strip.

First experiment was to wrap it around the outside of a clear plastic tub with the LEDs facing inwards. It produced a good light however the heat build up was significant and I’m not sure much defuser efect was going on.

Second experiment

My next experiment is to find a suitable section of some kind of pipe to put the strips around the inside. They have a self adhesive on the back so should be easy to apply.

/ license

Keywords: LED, Photography, Macro, Light