LED Matrix Power and Size Calculator
Pick your HUB75 panel size and layout to get the total resolution, how much current it can draw, and what 5 V supply to buy.
Total display
64 x 32
2,048 pixels on 1 panel
Worst case (full white)
7.68 A
38.4 W at 5 V · typical graphics about 3.84 A
Suggested supply
5 V 10 A
Covers the full-white worst case with 20% headroom. Power the Raspberry Pi from its own supply.
How it's calculated
HUB75 panels light two rows at a time. Adafruit puts each lit pixel at up to about 0.06 A at full white, so a panel's worst case is its width × 2 × 0.06 A: 7.68 A for a 64-pixel-wide panel. Typical graphics use about half. The brightness cap scales the result, the same way a software brightness limit does. The full explanation is in the LED matrix power supply guide.
This is an estimate for sizing a supply, not a measurement. Panels vary by manufacturer and scan rate.
Building a scoreboard? See the Raspberry Pi sports scoreboard and the LED matrix mounting frame.