Boolean logic module

George is a Boolean logic module which can supply 6 different logic functions from the two inputs – OR, NOR, AND, NAND, XOR & XNOR.
The logic functions are all obtained from 4011 NAND chips configured to deliver the different types.
It will work with any signals crossing approx. 1V.
Outputs are 5V gates.

https://www.nonlinearcircuits.com/modules/p/george