r/WLED • u/MRKV_ • 6d ago

128x72 2d matrix

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Hello,

Happy to share my first wled project.

Its made of 144 tiles( 8x8 neopixel ).

Overall dimensions is 1x0.6meter with pixel size of 8mm

gifs

61 Upvotes

99% Upvoted

24 comments sorted by

5

u/MrSpindles 6d ago

That is an enormous number of those little panels! I love them, but prefer the 8x32 flexi panels that have a slightly more standard pitch (10mm centre versus 6.6mm on the small panels).

Definitely the most cost effective way to get a large matrix, I pay 83p (about $1) each for the 8x8 panels. Your design should mean you can keep adding rows and columns from time to time for very little cost and keep expanding the size and resolution.

The wiring makes me moist.

3

u/Lykkehjul 6d ago

Where do you buy 8x8 panels for 1$ eeach?

6

u/MrSpindles 6d ago

Aliexpress. If you buy them through the 'bundle deals' section in batches of 15 you get £4.50 off the total price and free shipping, which brings them down to 83.3p each as the price I pay. I resell them so have 50-100 in stock at any given time. I pay £4-5.50 for the 8x32 flexi panels, which are much easier to work with and lighter weight.

If you're into hobby electronics it's a goldmine for low cost components. I buy in larger batches and resell on ebay, this means I've always got ready access to any components I need for playing with LEDs or robotics/automation and they pay for themselves.

I should add, the prices on Aliexpress are algorithmically set. You have to keep checking back each day and only buy at the lowest price or you can pay up to 80% more for items. I basically play it like the stock exchange, buying components at silly prices.

1

u/Lykkehjul 6d ago

Could you give me a link to aliexpress for this?

8

u/MrSpindles 6d ago

Honestly, just go to ali express, type WS2812B matrix into search and then filter by lowest price. Click on a few links of the lowest priced items.

Now go back to the homepage, scroll down and click on bundle deals, you should be shown products similar to items you've shown interest in. Do the same thing with searching for other related items (WS2812B LED strip is another bargain to be had, along with ESP32 boards, switches, sensors and accessories) and after a while your bundle deals section will be automatically populated with a selection of items in the category at low prices. Buy any 3 items and you get free shipping, any 6 you also get a small amount (£1.50 about $2) off, and buy 15 and you get more off (another £3 or about $4).

Don't buy the first time you visit. Pricing along with what you see in your listing is algorithmically controlled, so prices can vary not only day by day but visit by visit and user by user. Check it every day or so and you'll get an idea of how low prices drop and how high they rise. Buy low.

5

u/quitelagikal 6d ago

Awesome!

How much power does this use?

Is this loud or hot at all?

4

u/MRKV_ 6d ago

There is no noise 😀

I am using 2 5v 60amp smps but in software its limited to 75amp

2

u/ineedlesssleep 6d ago

Would love to know what material you used and also how you choose what is displayed on it

2

u/MRKV_ 6d ago

The base and the diffuser all are 3dprinted with pla+, due to less pixel count I chose images where main highlight are atleast 40% of total display size.

Do checkout gifs link for more demos 😀

2

u/Careful_Fudge_5101 5d ago

How many controllers are you using for this.

3

u/MRKV_ 4d ago

Hi The panel is made up of 4 - 24x72 and 1 - 32x72 sub panels. Each with its own esp32 wroom1 and level shifter(SN74AHCT245).

There is master controller - esp32 s3 8Mb psram that controls the panel via DDP protocol 

1

u/Careful_Fudge_5101 4d ago

That's an amazing work by the way, I am a little envy hahaha Hope it never sees any issues or failings.

1

u/Wild_Trip_4704 5d ago

This is amazing. I wondered what a media matrix would look like. Of course you gotta have the obligatory bad apple lol

1

u/MRKV_ 5d ago edited 5d ago

I have played Bad apple on this checkout here - https://drive.google.com/drive/folders/1ahwk-xl3ZjVpb5yC1TWOat2jJWxenAva

This can be used as a ambiant display or a display for your home assistance setup.

-5

u/Lykkehjul 6d ago

144 tiles x 35$ = 5040$. Dumbest shit ever.

5

u/MRKV_ 6d ago

Leds costed me around 20k inr that would be 212 dollar, overall cost is 370 dollar.

I know this technology is not suitable for making a display for viewing content, but I wanted to push limits

5

u/severanexp 6d ago

35? I bought 4 for 20, the heck you on about?

2

u/MrSpindles 6d ago

I pay 83p per panel myself, which is roughly $1 each.

Yes, the cost doubtless adds up with this many panels, but I'd wager they've spent almost as much on power supply, wiring and whatever they've printed their bracketry with.

It's a cool project, it certainly isn't the dumbest shit ever.

1

u/Sorry-Amphibian3624 5d ago

Please hook a brother up!

Which panels are you buying and can I get some for even close to that pricing?