Yet More Source of Uncertainty -- this is board number 1; but the 3rd of the boards that I have built. It has one rather old CMOS part in the 4006 -- for some reason this particular part has become very hard to get hold of but it is actually fitted here. All it needs is quite a few more resistors and we should be away! This one is a random Quantizer, from my rather brief look at the schematic it might be better called a Random Attenuator! Anyway I still need to finish it off and give it a real test to be more sure...
