Any idea what these LED matrix signs cost as the raw unit, ready to integrate with your own thing for a DIY project?
Does the cost scale somewhat linearly with number of LEDs or horizontal x vertical resolution in pixels?
Does the cost scale somewhat linearly with number of LEDs or horizontal x vertical resolution in pixels?
You can also buy P5, P10 and other sizes. They number tells you how many millimeters between each physical pixel.
I use P10s for my Christmas display, they look good from about 15feet away or more.
$0.01 per LED
About $2 per 100x100 mm board if you order about 100 of them.
About $1 per above board for assembly service.
Total: $6 per 15x15 LED board of 100x100 mm.
Total: $12 per 30x30 LED board of 100x100 mm.
I have no idea about how many would you actually need.
As for the power supply, each LED draws 12 mA. So you are going to need quite a beefy supply.
15x15 grid = 2.7 A @ 5 V
30x30 grid = 10.8 A @ 5 V