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#leds

1 post1 participant0 posts today
Public
Stylus

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: adafruit-playground.com/u/jepl

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.

A bright pixelated LED panel shows the World 1 map in Super Mario Bros 3. A SNES style controller is sitting on top of the LED panel. On the right a red PCB with 3 connectors (2 occupied) can be seen. This is the "Active3" adapter. Under it (with just a few features visible, such as the USB ports) is a Pi 5. All around on the wood desk are pieces of electronics from those other projects I just never manage to tidy up...
A view of the back of the matrix. You can see 4 individual sub panels held together by a white plastic 3D print. There are ribbon connectors and power cables, making the thing a bit of a rats nest. As in the other photo, it's on my messy desk with a dark wood finish & lots of unrelated wires, PCBs, tools & more.
#Adafruit#RaspberryPi#Pi5
Continued thread
Public
Jer 🚵🏼

Measuring voltage w/bad LEDs it's around 80vdc. Short around a bad LED and it drops to around 40-50vdc. The LED driver shows its output from 36-65vdc and 300mA. It would seem the driver is cranking things up to hit some level of current flow?
#electronics #LEDs

side view of the LED driver, which has a transformer that’s tilted off the board at a jaunty angle. Also a number of capacitors, resistor or two, maybe a thermistor, diodes, and chip(s).
Public
Jer 🚵🏼

Good day and welcome to fun with white LED fixtures. Today we have two of them, one that’s dimly lit and another totally borked. Both can be semi-revived by shorting around a burnt out LED.
Most of these fixtures have all of the LEDs in series, which means if even one burns out the whole device quits working. Not a great design.
#electronics #LEDs

dimly lit LED lights in a zig-zagging circular pattern, a few of the LED chips are not lit at all. There’s a smaller light fixture near top of frame that is also plugged in, but no light.
Same fixture this time one of the burnt LEDs is shorted around w/alligator clip and everything is very bright (brighter than photo can reliably show)
same test on the smaller fixture, but on this only about half of the LEDs light up when bad one is shorted, so there’s at least one other bad LED on the other side.
Public
diyelectromusic

Yet another MIDI monitor on yet another small, neat, microcontroller - this one the Waveshare RP2040 Matrix which has a great little 5x5 programmable LED matrix onboard.

And no, I'm not bored of these things yet :)

diyelectromusic.com/2025/02/22

Simple DIY Electronic Music Projects · Waveshare RP2040 Matrix MIDI Monitor
More from Simple DIY Electronic Music Projects
#MIDI#RP2040#LEDs
Public
Straithe

Wore some LEDs on a call with my electronics friends yesterday. This set of LEDs is my first time working with WS2812s and second time working with a Pixelblaze. Sunday these lights will be going onto an art piece I have in the works. But maybe I should do a photoshoot with them first.

#LEDs#electronics
Public
HazeCore

I always liked the look of etched acrylic, but I don't have a laser. So I gave the Plotter+Transparent matte Paint Method a go.

The result seems quite neat, but I think it could use one or two more coats. But I wasn't patient :P

Testing with LEDs coming soon.

A hand holding a small sheet of acrylic on which a picture and the text HazeCore is somewhat visible
#make#leds
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