Here’s a really fascinating circuit that implements a combination lock using relays and logic gates. Even with the schematic and written explanation of how it works we’re still left somewhat ...

this teaching tool allows different logic gates to be wired together with patch cables. While [David] first thought to use 74-series logic circuits directly, a much more versatile solution was to ...

Also known as "combinatorial logic," it ... made of primitive logic gates (AND, OR, NOT, etc.) in which all outputs of the function are directly related to the current combination of values ...