An LED matrix installed in a real pumpkin ... Before we talk about how to design the circuit, let’s take a look and the build process. I decided from the start to use different colored LEDs.

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 ...

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 ...

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