I had found some tweets by the company where they talked about using an Adafruit panel that was $40. The price on Amazon was about $30 so I figured I would go with the lower price. They may have switched to a lower cost panel but my guess is that didn't happen.
The generic name for these panels are "HUB75", based on the interface they use for driving them. I can confirm, these are $10-15/ea in small quantities on sites like Aliexpress. But you're likely right, they were probably buying retail from Adafruit.
"HUB75" refers to the 16 pin connector and specific structure of the square wave signals it's expecting (row order, pixel order, etc). This particular sign appears to use a 4mm pitch (space between each R/G/B led), indoor-level brightness SMD leds, and modules that are 32x64 pixels, like this one on AliExpress: https://www.aliexpress.us/item/2251832064290423.html?spm=a2g... ( ~$8 + ~$9 shipping to the US for single qty).
There are various "HUB75" panels of different pitch, brightness, LED type, matrix size, etc. Also, there's variations like "HUB75E" with 5 address lines instead of 4. Address lines are typically A/B/C, A/B/C/D, or A/B/C/D/E. And there's also "HUB08", "HUB12" and other standards.
jamesmunns|3 years ago
tyingq|3 years ago
There are various "HUB75" panels of different pitch, brightness, LED type, matrix size, etc. Also, there's variations like "HUB75E" with 5 address lines instead of 4. Address lines are typically A/B/C, A/B/C/D, or A/B/C/D/E. And there's also "HUB08", "HUB12" and other standards.
hef19898|3 years ago