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Project: Pinball

A display for the pinball machine

The first idea for the display system is a monochrome LED matrix display in the pinball's backbox.

Currently, I am planning on a 37.5x16 cm display consisting of 75x32 LEDs of the right size - probably 0.5cm diameter.

This matrix of 2400 LEDs will then be controlled by a microcontroller board interfacing the main control computer's parallel port.

The microcontroller board will possess a RAM chip used as video memory, which will be accessed as bitmap from the microcontroller to turn LEDs off and on.

The microcontroller can then, through a 32-bit wide row bus, cycle through the 75 columns using a 7-bit wide bus and demultiplexers. For this, five 8-bit outputs on the microcontroller are needed.

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Last page update: 2006-10-30