300-Sq.-Foot LED Show Hid Behind “Regular” Wall
What does a wall fitted with 90,000 APA102 programmable LEDs appear to be? In the event you occur to go to the Oregon Museum of Science, now you can discover out — so long as it’s turned on that’s. The enormous show runs on 4 Spartan 6 Mojo FPGA boards, and is put in behind a wooden grain sample. Which means that when its powered off, the wall seems to be like, effectively, only a wall.
To shine by way of the wooden grain and acrylic concealing electronics inside, APA102 LEDs have been chosen for the job due to their excessive brightness ranges. The ultimate show is a powerful 24’ broad x 14’ excessive and a complete decision of 408 x 220 — 89,760 factors of sunshine when you’re counting at residence.
In motion, a video sign is distributed through HDMI to the 4 FPGA boards, which break photos down into their respective pixel quadrants. On account of reminiscence restrictions, it takes three passes to rearrange the outputs, giving a remaining video refresh charge of 20 frames per second. A number of customized shields are carried out to arrange this large wiring job, and the LED panels themselves are merely LED strips linked collectively in a customized sample.
As soon as the whole lot was in place, plates of acrylic have been then mounted — giving it the look of a normal-ish wall with a vivid secret inside!