# Making a chromakey green led light for video overlays

**URL:** <https://forum.core-electronics.com.au/t/making-a-chromakey-green-led-light-for-video-overlays/471>\
**Category:** Product Questions\
**Created:** [22 October 2016 09:01 UTC](https://forum.core-electronics.com.au/t/making-a-chromakey-green-led-light-for-video-overlays/471 "2016-10-22T09:01:53Z")\
**Posts on this page:** 8\
**Page:** 1

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**Author:** ![Jayson21528](https://avatars.discourse-cdn.com/v4/letter/j/dec6dc/32.png) [@Jayson21528](https://forum.core-electronics.com.au/u/Jayson21528)\
**Post date:** [22 October 2016 09:01 UTC](https://forum.core-electronics.com.au/t/making-a-chromakey-green-led-light-for-video-overlays/471/1 "2016-10-22T09:01:54Z")

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[http://ledchromakey.com/](http://ledchromakey.com/) \<- this is the idea.

What i want is a neopixel ring, that is big enough to go around my lenses, and then is addressable with green 00FF00

it would be useful to be able to dim the led ring.

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**Author:** ![Graham](https://yyz2.discourse-cdn.com/flex028/user_avatar/forum.core-electronics.com.au/graham/32/54_2.png) [@Graham](https://forum.core-electronics.com.au/u/Graham)\
**Post date:** [22 October 2016 09:07 UTC](https://forum.core-electronics.com.au/t/making-a-chromakey-green-led-light-for-video-overlays/471/2 "2016-10-22T09:07:47Z")

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Hi Jayson,

There are lots of [Neopixel options](http://core-electronics.com.au/search/?q=neopixel+rings) - you could make a very large one with four of [these segments](http://core-electronics.com.au/neopixel-1-4-60-ring-ws2812-5050-rgb-led-w-integrated-drivers.html). They are very easy to control as well. Checkout [this Library](https://github.com/adafruit/Adafruit_NeoPixel) and/or this guide design for beginners who are new to both [Neopixels and Arduino](https://learn.adafruit.com/adafruit-neopixel-uberguide/arduino-library).

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**Author:** ![Jayson21528](https://avatars.discourse-cdn.com/v4/letter/j/dec6dc/32.png) [@Jayson21528](https://forum.core-electronics.com.au/u/Jayson21528)\
**Post date:** [22 October 2016 09:10 UTC](https://forum.core-electronics.com.au/t/making-a-chromakey-green-led-light-for-video-overlays/471/3 "2016-10-22T09:10:54Z")

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are you saying there are 1/4 segments, and the 4 together make that circle?

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**Author:** ![Graham](https://yyz2.discourse-cdn.com/flex028/user_avatar/forum.core-electronics.com.au/graham/32/54_2.png) [@Graham](https://forum.core-electronics.com.au/u/Graham)\
**Post date:** [22 October 2016 09:22 UTC](https://forum.core-electronics.com.au/t/making-a-chromakey-green-led-light-for-video-overlays/471/4 "2016-10-22T09:22:52Z")

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> [@Jayson21528](#):
>
> are you saying there are 1/4 segments, and the 4 together make that circle?

That’s just the case for this incredibly large [Neopixel option](http://core-electronics.com.au/neopixel-1-4-60-ring-ws2812-5050-rgb-led-w-integrated-drivers.html). They are very easy to join together and control as one segment. Well, providing you know your way around a little soldering 🙂

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**Author:** ![Jayson21528](https://avatars.discourse-cdn.com/v4/letter/j/dec6dc/32.png) [@Jayson21528](https://forum.core-electronics.com.au/u/Jayson21528)\
**Post date:** [22 October 2016 09:34 UTC](https://forum.core-electronics.com.au/t/making-a-chromakey-green-led-light-for-video-overlays/471/5 "2016-10-22T09:34:58Z")

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that part is sorted out, so how do you program them, and address them… what is the shopping list i need… [https://store.particle.io/#particle-maker-kit](https://store.particle.io/#particle-maker-kit) \<- do i need one of these thingys

I cloned the library on github.

That doesnt look too bad. Do i buy all the things from one place? without international shipping costs?

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**Author:** ![Graham](https://yyz2.discourse-cdn.com/flex028/user_avatar/forum.core-electronics.com.au/graham/32/54_2.png) [@Graham](https://forum.core-electronics.com.au/u/Graham)\
**Post date:** [23 October 2016 00:23 UTC](https://forum.core-electronics.com.au/t/making-a-chromakey-green-led-light-for-video-overlays/471/6 "2016-10-23T00:23:51Z")

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Perhaps start here [https://learn.adafruit.com/adafruit-neopixel-uberguide/arduino-library](https://learn.adafruit.com/adafruit-neopixel-uberguide/arduino-library)

We’ve got all the bits listed throughout that tutorial - just put the Adafruit product number into our search box 🙂

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**Author:** ![Sam](https://yyz2.discourse-cdn.com/flex028/user_avatar/forum.core-electronics.com.au/sam/32/99_2.png) [@Sam](https://forum.core-electronics.com.au/u/Sam)\
**Post date:** [23 October 2016 22:43 UTC](https://forum.core-electronics.com.au/t/making-a-chromakey-green-led-light-for-video-overlays/471/7 "2016-10-23T22:43:35Z")

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Hey Jayson, if you’re using Particle gear, I’ve written a tutorial on [using NeoPixel’s with Particle](http://core-electronics.com.au/tutorials/particle/using-neopixels-with-particle.html) from start to finish! Should get your project rolling.

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**Author:** ![Jayson21528](https://avatars.discourse-cdn.com/v4/letter/j/dec6dc/32.png) [@Jayson21528](https://forum.core-electronics.com.au/u/Jayson21528)\
**Post date:** [24 October 2016 02:13 UTC](https://forum.core-electronics.com.au/t/making-a-chromakey-green-led-light-for-video-overlays/471/8 "2016-10-24T02:13:17Z")

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That looks good I feel I can have a run at it following the hair tutorial