I think I'm done screwing around with analog goofiness for a while (hopefully). I've retested all of the monadic gates that require diodes. I've experimented with various resistor values and tried germanium diodes, silicon small signal switching diodes (1N4143's), and Schottky diodes (1N5817's). Using a combination of 2K resistors for the comparator outputs and 470K resistors for the final pull-down after the diode's gives the most desirable voltage outputs across all of the different diode types. The germanium diodes are consistently the best in that they have the lowest voltage drop and give the best 0V value at around 0.030 mV. Next best are the Schottky diodes which have a voltage drop only slightly worse, but which give a 0V value of around 0.080 mV. Finally there are the silicon switching diodes with have a pretty bad voltage drop and give a 0V value of around 0.380 mV. All of them are acceptable and function, but I'm changing all of my schematics to include the 470K pull-down resistor where applicable and making all the diodes Schottky type since they are much cheaper and easier to find than germanium diodes. As an odd note, both the germanium and Schottky diodes work perfectly without the pull-down. I'm including it anyways because it really ought to be there and the circuits fail when using the extremely common switching diodes if the pull-down is not present.

I've updated the monadic gates here, here, and here. The remaining schematics will follow soon and then I can finally get back to working on new gates.

And one other thing. Traditional breadboards are a waste of atoms. I'm going to try these. I don't know if they will be any better, but they can't be any worse.