MAME - Custom graphics LED Matrix filter

[negative1]

I played the worlds largest pac-man awhile ago, and i liked the look of the LED matrix.

 

 

since we're not getting that version, even though its run off a pc,

i saw these:

 

but you need an LED matrix screen, and it's the wrong resolution, aspect ratio etc..

 

i do have an idea to get 4x4 matrix of 64x64.. but thats another project.

 

early versions of MAME let you define your own scanlines, etc..

 

so here's how mine came out:

-----------------------------

square grid:

 

 

circular grid:

 

and here's the video:

 

later

-1

Edited December 22, 2018 by negative1

[Keatah]

Mmm.. subtractive filters. Dunno about that.

[youxia]

Interesting, though these pixels are too big and scanlines too thick. But nicely round at least.

(I mean the first pic. The latter look fairly awful)

Edited December 22, 2018 by youxia

[negative1]

Interesting, though these pixels are too big and scanlines too thick. But nicely round at least.

(I mean the first pic. The latter look fairly awful)

there are no scanlines, and at full resolution, they almost match

the arcade ones.

 

in a way, its a cross hatch, because you have blank areas horizontally and

vertically around the pixels. and they don't match the dot pitch of the real pixels.

 

still, fine tuning them. buts thats good enough for now, and playing it, you don't notice them anyways.

 

there's not much you can do with 32x32 pixels, 64x64 gives you more room but not much for circles.

 

later

-1

[R.Cade]

When I saw one of those last year, I figured you could buy the panels and make one at home and adapt MAME. However, at the time the panels were expensive and it would have cost thousands. I haven't looked, but it may be better now.

 

If my math is correct, you'd need 992 of the 8x8 panels at $8-10/each. Ouch.

Edited December 22, 2018 by R.Cade

[negative1]

When I saw one of those last year, I figured you could buy the panels and make one at home and adapt MAME. However, at the time the panels were expensive and it would have cost thousands. I haven't looked, but it may be better now.

 

If my math is correct, you'd need 992 of the 8x8 panels at $8-10/each. Ouch.

math ? $8000+ - $10000, might as well buy the machine.

 

looking at the actual specs of grid of 7 x 9 panels,

each panel is 32x32 LED

pixel count approx 65,000

 

if you want a smaller 1/5 or 1/4 scale one, as a compromise.

you can get 64x64 panels for $40 with a much smaller pitch like p4 or p5,

and the panels are about 7 inches across.

 

doing the math, you would need a 64x32 panel at the end, and 32x32 panels for the botton

of the grid...

 

[1 2 3 4 5 6 7]

1

2

3

.

 

9

====================

This would match the 224 x 288 pixel, but matching the LED panels at 32x32..

in the end for a much smaller one.. it would cost about $1000 for the panels,

and a few hundred more for controllers, power supplies, wiring, controls, etc, etc..

 

but it could be done..

 

i'm going to do a test with 4 x [64x64 LED], just for fun.

should be about $200 or $300..

there's a good starter video here:

https://learn.adafruit.com/raspberry-pi-led-matrix-display?view=all#

 

and they are only using 1 x [64x64 LED]

 

later

-1