Scanning at 80 frames per second he gets a nice, flickerless display. To make both the LED matrix circuit board and the control board, [Joekutz] carved out isolation paths in copper clad boards ...

Earlier this year [Skyhawkson] got ahold of an Apollo-era printed circuit board which he believes was ... for the Supercon badge and petal matrix. Being on a roll, I decided to take [Skyhawkson ...

and a built-in de-ghosting circuit to eliminate LED ghosting artifacts in matrix scanning operations. The device operates over a wide voltage range of 2.7V to 5.5V and an industrial temperature range ...