Beers AND/OR Boolean logic

Beers AND/OR Boolean logic

AND, OR, NAND, and NOR outputs from up to four inputs. The toggle switches next to each input select between on, off, and inverted logic for that input.

Down: ON - any signal greater than ~1V is logic 1

Middle: OFF - input is inactive

Up: INVERTED - any signal LESS than ~1V is logic 1

This scheme allows more customisable logic gates like A and not-B and C

Typically, any unused inputs would be set to OFF. An unused input left ON would prevent AND from ever being true, or if left INVERTED would make OR always true.

If you only require a 2-input logic gate leave the other two toggle switches OFF (middle position)

4HP +12V: 12mA, -12V: 0mA

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