My hub75 based display has started having rendering issues lately. After messing around for a while and getting nowhere I believe I've finally fixed it by reducing the power supply voltage to 4.7V instead of 5V. I guess some of these displays don't really like 3.3V logic and reducing the difference helps.

#ESP32 #hub75 #LEDs

The new Steam Machine is a cube measuring 160mm on a side. In completely unrelated news, Adafruit is still selling 64x64 LED matrices that measure 160mm on a side.

https://www.adafruit.com/product/3649

#Steam #SteamMachine #HUB75 #LEDs

Just playing Super Mario All Stars on an RGB matrix panel as you do.

To keep things together better, I 3D printed a bracket in two pieces, the subject of a work in progress playground note: https://adafruit-playground.com/u/jepler/pages/3d-printed-bracket-for-4-64x64-2mm-rgb-matrix-panels

This is using a 3rd party breakout board with 3 HUB75 connectors. I recently added the ability to drive up to 3 connectors to Adafruit Piomatter, as well as temporal dithering.

In this specific interest, I'm using 2 connectors to drive a total of 4 64x64 panels. --num-planes=6 --num-temporal-planes=2 means I'm getting effective 18 bit color, albeit with the least significant 2 bits being shown on alternate refreshes, creating a tiny amount of 44Hz color shimmer.

All these "go faster" tricks together give me about 88Hz refresh rate on the panel, despite that we're still limited to about 10MB/s of data between the PI's main CPU and the PIO peripheral that's acting as the LED controller.

#Adafruit #RaspberryPi #Pi5 #HUB75 #LEDs

Rhaaaaa c'est D et pas GND.

Rhaaaaaaaaaa, bon je vais me coucher tiens.

Si vous achetez ce panneau de LEDs

https://fr.aliexpress.com/item/1005006875145275.html?spm=a2g0o.order_list.order_list_main.38.7fee5e5bRm1MPA&gatewayAdapt=glo2fra

Faites attention ! Évidemment, après y a pas toutes les leds qui s'affichent !

#electronic #aliexpress #led #matriceled #HUB75 #erreur #silkscreen

Capping my work for @adafruit this week with the first working demo for pi5 with the "active3" RGB matrix adapter.

This adapter lets you push out about 3x as many pixels per unit of time, which mean you can either improve your refresh rate or drive more pixels with the same refresh rate.

Mapping these pixels is more complicated than with a single matrix connector, so the open pull request punts and just makes you write the pixel map in Python. This is evaluated just once at your program startup, keeping the pixel mapping part of the code fast when you update the screen contents.

I hope that a future improvement will supply some standard mappers for 2- and 3-connection display setups; at a minimum, I'd like it to work when each strand is a single panel or string of linear panels, and they're in horizontal or vertical stripes.

#hub75 #raspberrypi #pi5 #pio #rp1 #piomatter #python

49152 LEDs! @adafruit

https://github.com/adafruit/Adafruit_Blinka_Raspberry_Pi5_Piomatter

These 64x64 panels worked, except my samples have R and B channels swapped so it did need some new code. I took the opportunity to turn the pinout & framebuffer format into constructor parameters, to avoid a combinatoric explosion with the original design, in which there was a separate constructor function for each (pinout, framebuffer) pair.

PR is open at
https://github.com/adafruit/Adafruit_Blinka_Raspberry_Pi5_Piomatter/pull/14

#Python #HUB75 #RaspberryPi #Pi5

Haven't seen this discussed anywhere so

Some #hub75 panels use an ASIC instead of a simple shift register for driving the LEDs to prevent burn-in etc - which means the chip expects a certain regular timing on its pins, else it goes dark. So if your simple test code isn't frigging latching and you've been debugging for hours, check your panel ICs!
#embedded #led