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Getting your own Ambilight setup doesn’t mean you have to go out and buy a brand new television. With some coin and software trickery, you can easily get setup for under $100.
Andy is a programmer with a love of technology, DIY projects and custom pc builds.

You’ve seen that fancy lighting system from a certain major highstreet brand. That’s right – Phillips Ambilight. It’s an expensive technology that is integrated into many of its top of the line televisions. It’s beautiful, much like its Hue range, but if you’re like me and struggling financially through lockdown, you can easily do it yourself on the cheap.

Do you want to find out how to make your own PC Ambilight with an Arduino? Well, today, I am going to show you how you can achieve the same effect with nothing more than an Arduino, A Strip of LED lights, Software trickery and a little bit of patience.

Save yourself money

Ambilight (or any quality lighting) is great for reducing eye strain. Not only that, but it looks awesome as well. Phillip’s Ambilight is generally reserved for their higher-end OLED ranging anywhere from $800 upwards – that’s no small coin. For a fraction of the cost, you can get this technology behind your monitor for less than $100.

How do I create my own Ambilight setup for my gaming PC?

I should say that this guide on how to create an Ambilight setup for your gaming PC will not work on a TV. This method sends wireless signals processed by software installed on your computer and therefore handles all of the video processing. If you want to create your own Ambilight setup for your TV, you will need a RasberryPi and HDMI capture which I will cover in a later article.

We will use a modified version of a program called Prismatik to capture our screen and figure out the colours around the edge of our pc monitor while simultaneously sending via the WiFi to our Arduino, which is connected to LED Strips.

Prismatik handles all of the heavy-lifting by processing all the video and generating the right code for WLED to interpret. The software also comes with some mapping and optimisation functionality, which will let you precisely position our LED strips, control gamma levels, and send accurate data to our Arduino.

DIY Ambilight Hardware Required

I recently reviewed the led strips we will be using today and was really impressed, which is why I ordered some more and did this project. The colours are accurate, and the hues are nice for setting some ambience.

If you have some WS2812B led strips laying around, those will do too.

ItemDescription
5 meter SK6812/WS2812 – 60 led per meterWS2812B and SK6812 are addressable RBG strips. The only difference between the two is the SK6812 comes with a separate white diode allowing us to achieve better hues and more pastel shades without seeming too bright.Link
Wemos D1 Mini ESP8266ESP8266 based Arduino development board. It comes with onboard USB and wireless and saves us having to solder these components separately.Link
20awg LED WireSome quality 20AWG Led wire will save you a lot of headaches down the line as you gain confidence setting up, inevitably you are going to start using longer lengths.Link
1000uf CapacitorIt’s recommended to bridge the 5v input terminals to protect the leds and arduino against power spikes when the power source is first turned onLink
BreadboardA breadboard is generally used for prototyping however, I’m still using mine to power my lights. Its handy to have one just in case, it makes the initial setup and testing really easy.Link
Breadboard WiresWhile you will only need to use one or two, you can never have enough of them around.Link
5v power supplyAmperage will be determined by how many LEDs you wish to run, the formula for figuring this out is below.Link
Soldering IronYou will need an adjustable soldering iron capable of soldering around 400f. I have linked the exact kit I am currently using and it’s serving great for hobbyist soldering.Link

Software Required

WLEDWLED is software runs on our Arduino. It gives us easy WiFi access control, change led colors and can also watch and interpret incoming signals on the wifi.
PrismatikPrismatik is a screen capture program that will get the colours around the edge of our monitor and send the data to WLED installed on the Arduino.

Wiring Schematic

We recently did an article that showed you how to create your own RBG lighting setup using this exact same setup. If you have not seen it already, you should check it out. There is a host of useful information, including how to solder the pins on to your Arduino, schematics, and helpful videos.

Step by Step PC Ambilight Guide

Install WLED on your Arduino

Installing WLED on Wemos D1 Mini

Our do-it-yourself Ambilight setup will use the same hardware and software as we used in our earlier guide. Follow the link below and follow the guide to install WLED on your Arduino in preparation for the rest of the guide, which we will complete here.

How to install WLED on an Arduino using Pyflasher

Configure WLED to accept UDP connections

So I assume you have installed WLED already and have it connected to your WiFi and the mobile app installed on your phone? Good job! The things you can do out of the box are amazing. If you opted for the SK6812, you’re in for a treat.

To configure WLED to accept incoming data, you will need to open the mobile app and go to Config > Sync Interfaces.

You will need to make sure UDP receive is on for Brightness, Color and Effects.

Install Prismatik & Configure

Prismatik is a part of the Lightpack ecosystem. It can be downloaded at the following link: https://github.com/psieg/Lightpack/releases

We are not using the official release of Lightpack Prismatik as it is rarely maintained. The above repo is actively maintained and comes with some nice optimisations such as better DirectX grabbing and UDP support for WLED.

Once you have downloaded the Software, you need to enable a few settings first to get the most out of the software; Complete each step in order, and you will come out of the other side with Ambilight enabled, and data is streamed wirelessly.

The video above will show you the steps to configure Prismatik correctly; otherwise, the steps below will do the same as well.

  1. Enable Server under Expert
  2. Enable DX hooking & also hook D3D9 Under Expert
  3. Make sure Win8 Desktop Duplication is selected, failure to enable this will result is a really jerky experience that is almost fps locked
  4. Click run configuration wizard under Device
  5. Click next and then select WARLS (UDP, 255 LEDS)
  6. Enter the IP address of your Arduino device you installed WLED on earlier, you can find this in the WLED app. Ours was 192.168.0.170
  7. If you left the UDP port in WLED set to default, the correct port is 21324, hit next
  8. Zone placement. You need to set a few key things here; Number of LEDs, the Distribution, Thickness and the Style of Layout you have
  9. Set your power supply limit, mine is 8amp
  10. On the next page, you will need to balance your white levels. If you have some hardware to help you with this, I would highly recommend it however, I don’t and had to eye-ball it. The goal is to make the white of your LEDs with the white of your screen the best you can.
  11. Hit finish

Conclusion

If you followed all the steps above, you should have everything working; if not, then leave a comment, and I’ll get you on the right track.

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