5. A 32-Bit Calculator
https://www.youtube.com/watch?v=Ns4f8wqo8eQ Most calculators arent particularly interesting. Then again, most calculators arent the size of several football pitches, and dont take over 800 hours to build. This calculator fills both of those criteria. The sheer scale of the thing is what makes this machine so impressive the number of quartz blocks and the amount of redstone used is simply mind-boggling. I wont even attempt to explain how this one works mostly because I have absolutely no idea but you can see for yourself what the end product is actually doing. The calculator itself is very slow, as you can see but given how complicated the system must be to allow you to input numbers, choose a function, make things negative or positive, and then actually DO the whole calculation, it isnt really a surprise that it might take a little while for everything to fall into place. Especially with the amount of redstone causing lag by itself as it passes a pulse from one block to another. Unfortunately, you wont be able to take this one into an exam.